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315 verified Doctors in Ontario, CA
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Availability last updated 04/21/2026
Availability last updated 04/21/2026

Dr. Rishi Majithia, MD

Primary Care Doctor
4.81
·320 reviews
Staff was friendly not much of a wait and doctor answered all my questions. Thank you! - Apr 7, 2025 by Estela C.Click to read more
2.5 mi · 99 N San Antonio Ave, Ste 210, Upland, CA 91786
Accepts Aetna, BlueCross BlueShield, Cigna + 12 more
Also offers video visits · Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Hello! Please review a few things when booking with me: Before booking, please make sure the location works for you. We are based out of Upland, California. We collect deductibles and copays at the time of service. If you have any questions or concerns, please call your insurance before your visi...Click to read more
Next available: today

Dr. Azhar Majeed, MD, FACP

Primary Care Doctor
4.79
·135 reviews
Yes, seemed genuinely concerned. Wanted to address my issues through testing and exams. - Feb 26, 2025Click to read more
4 mi · 255 E Bonita Ave, Pomona, CA 91767
Accepts Aetna, BlueCross BlueShield, Cigna + 40 more
Also offers video visits · Accepting new patients · 25+ years of experience · Highly recommended · Expertise in diabetic emergency + 9 more ·
Read bio
Serving members of the Pomona, Upland, and San Antonio communities, Dr. Azhar Majeed provides quality internal care with attention to detail, compassion, and a gifted support staff. He uses only the most up-to-date equipment to ensure accurate diagnoses and safe treatment plans. Dr. Majeed offers a...Click to read more
Next available: Thu, May 7

Heidi Larson, APRN, RN, NP

Family Nurse Practitioner
2.5 mi · 525 N 13th Ave, Ste A, Upland, CA 91786
Accepts Aetna, BlueCross BlueShield, Cigna + 20 more
Also offers video visits · Accepting new patients ·
Read bio
Heidi Larson, FNP-C is a board-certified family nurse practitioner with over 25 years of experience in medicine. She has been caring for patients at Rancho Wellness in Rancho Cucamonga for the past ten years. Originally from Huntington Beach, Heidi completed her undergraduate studies at Westmont Col...Click to read more
Next available: Thu, Apr 23

Dr. Lubna Isho, DO

Primary Care Doctor
4.82
·246 reviews
Dr. Isho is very nice and caring. You can tell she takes your concerns seriously. - Feb 24, 2024 by Magaret C.Click to read more
6 mi · 250 W Bonita Ave, #150, Pomona, CA 91767
Accepts Aetna, BlueCross BlueShield, Cigna + 13 more
Also offers video visits · Accepting new patients · 25 years of experience · Highly recommended · Excellent wait time ·
Read bio
NOW OFFERING LASER AESTHETIC TREATMENTS INCLUDING SKIN TAG REMOVAL, LASER HAIR REMOVAL, FACELIFT, SMOOTHEYE, LIPLASE. Dr. Lubna Isho is a board certified highly experienced Family Practice Physician. Through Compassion, meticulous attention to detail, and an atmosphere where patients can speak free...Click to read more
Next available: Tue, May 19

Martena Israil, NP

Nurse Practitioner (Virtual)
1.00
·1 review
Rancho Cucamonga, CA
Accepting new patients · Offers video visits ·
Read bio
Ms. Martena Israil is a skilled, friendly, and caring nurse practitioner. She currently offers her services at Rancho Weight Loss in Rancho Cucamonga, CA, and takes virtual appointments. As part of her formal education and training, Ms. Israil earned her master's degree in family health nursing fr...Click to read more
Next available: today

Carbon Health Urgent Care - Eastvale

Urgent Care Clinic
4.84
·64 reviews
The experience was great. I didn’t have to wait long, and I was out right away. by Tamara L.Click to read more
7 mi · 14117 Limonite Ave, Eastvale, CA 91752
Accepts Aetna, BlueCross BlueShield, Cigna + 16 more
Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Carbon Health combines smart technology and modern design to help make high-quality, inclusive, and personal healthcare accessible to all. With our convenient urgent care locations, we treat a full spectrum of health needs including cold, COVID and flu symptoms, urinary tract infections, sinus infec...Click to read more
Next available: today

Carbon Health Urgent Care - Rancho Cucamonga

Urgent Care Clinic
4.79
·99 reviews
We were seen very quickly and everyone was very kind and helpful. - Jun 12, 2025 by Josh G.Click to read more
7.5 mi · 7831 Monticello Ave, Ste 1102, Rancho Cucamonga, CA 91739
Accepts Aetna, BlueCross BlueShield, Cigna + 16 more
Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Carbon Health combines smart technology and modern design to help make high-quality, inclusive, and personal healthcare accessible to all. With our convenient urgent care locations, we treat a full spectrum of health needs including cold, COVID and flu symptoms, urinary tract infections, sinus infec...Click to read more
Next available: today

Hilda Mancilla, PA

Physician Assistant
2.5 mi · 525 N 13th Ave, Ste A, Upland, CA 91786
Accepts Aetna, BlueCross BlueShield, Cigna + 20 more
Also offers video visits · Accepting new patients ·
Read bio
Hilda Mancilla, PA-C, is a dedicated physician assistant at Rancho Wellness in Rancho Cucamonga and Upland. A lifelong Inland Empire resident, she earned her undergraduate degree from Cal State San Bernardino and her medical training from Western University of Health Sciences in Pomona. With 24 year...Click to read more
Next available: Wed, Apr 29

Dr. Aaron Lin, DO

Primary Care Doctor
4.94
·52 reviews
Friendly staff along with warm office environment. Doctor Lin engaged me in opening up about my medical history as that was my first visit. You feel at ease talking to Dr. Lin. - Sep 21, 2024 by Haissam D.Click to read more
9.5 mi · 253 S. Diamond Bar Blvd, Diamond Bar, CA 91765
Accepts Aetna, BlueCross BlueShield, Cigna + 9 more
Accepting new patients · Highly recommended · Excellent wait time · Expertise in lower back pain + 5 more ·
Read bio
I am committed to providing comprehensive health care for you and your family, working to achieve optimal health through a healthy lifestyle and disease prevention. I believe in caring for you when you are both sick and well. I earned my Doctor of Osteopathic Medicine degree from Rowan University an...Click to read more
Next available: Thu, May 14

Dr. Eric Lee, DO

Primary Care Doctor
4.91
·76 reviews
Great, patient communicator. Will go back to him next year for my physical. - Dec 17, 2024Click to read more
9.5 mi · 253 S. Diamond Bar Blvd, Diamond Bar, CA 91765
Accepts Aetna, BlueCross BlueShield, Cigna + 9 more
Accepting new patients · Highly recommended · Excellent wait time · Expertise in chronic diabetes + 3 more ·
Read bio
Dr. Eric Lee is a family physician and primary care doctor. He is a part of St. Jude - Family Medicine in Diamond Bar, CA. He treats a range of common illnesses and also offers consultations and check-ups as part of his services. Dr. Lee earned his medical degree from A. T. Still University. He co...Click to read more
Next available: Fri, May 15

Dr. Meisam Fekri, MD

Primary Care Doctor
4.80
·208 reviews
The staff and Doctor were awesome. Very friendly, professional and knowledgeable. I did Televisit. I was perfect. by Joe M.Click to read more
16.5 mi · 222 N Sunset Ave, Ste. F, West Covina, CA 91790
Accepts Aetna, BlueCross BlueShield, Cigna + 59 more
Also offers video visits · Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Medical, STRAIGHT MEDICAL ONLY! NO HMO MEDICAL! No Caloptima No Alameda Alliance No Care First No LA Care Health Plan No Kaiser Permanente No Inland Empire Education and Training: Doctor of Medicine, Shiraz University of Medical Sciences School of Medicine Residency in Internal ...Click to read more
Next available: today

Dr. Sergio B Villegas, MD

Primary Care Doctor
4.85
·48 reviews
Great job! - May 29, 2025 by Torreahno S.Click to read more
16.5 mi · 4646 Brockton Ave, Ste 201, Riverside, CA 92506
Accepts Aetna, BlueCross BlueShield, Cigna + 24 more
Accepting new patients · 25+ years of experience · Highly recommended · Excellent wait time · Expertise in diabetic emergency + 2 more ·
Read bio
Believing that prevention is the best medicine, Dr. Villegas makes health education a top priority for his practice. A San Gabriel Valley native who maintains strong ties with his home area, Dr. Villegas received his medical degree from the University of California-Davis and completed his residency ...Click to read more
Next available: today

Barbara Santacruz, PA

Physician Assistant
6.5 mi · 8231 Rochester Ave, Rancho Cucamonga, CA 91730
Accepts Aetna, BlueCross BlueShield, Cigna + 20 more
Also offers video visits · Accepting new patients ·
Read bio
Barbara Santa Cruz is a dedicated physician assistant at Rancho Wellness in Rancho Cucamonga and Upland, with over 44 years of experience in healthcare. A Southern California native, Barbara began her career in nursing before becoming a PA when the profession was still in its early days. Her backgro...Click to read more
Next available: Wed, Apr 29

Dr. Karen Kay G Alfonso, MD

Pediatrician
5.00
·1 review
7 mi · 15855 Pomona Rincon Rd, Chino Hills, CA 91709
Accepts Aetna, BlueCross BlueShield, Cigna + 9 more
Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Dr. Alfonso is a board-certified pediatrician practicing for over 10 years in Orange and LA county. She received her medical degree at UC Davis School of Medicine and completed her residency training at CHOC Children’s hospital. Her favorite thing about being a pediatrician is, of course, the kids!...Click to read more
Next available: Mon, May 18

Dr. Paul Usborne, MD

Primary Care Doctor
4.78
·89 reviews
Dr was very patient with me and listened very well. - Nov 19, 2024 by Mary M.Click to read more
14 mi · 256 W San Bernardino Rd, Covina, CA 91723
Accepts Aetna, BlueCross BlueShield, Cigna + 9 more
Also offers video visits · Accepting new patients · 24 years of experience · Excellent wait time · Expertise in lower back pain + 9 more ·
Read bio
Dr. Usborne is a Southern California native. He was born and raised in San Diego and graduated from Bonita Vista High School. He earned his undergraduate degree at the University of California, Davis. He received his doctorate degree from AUC School of Medicine and completed his post-graduate educat...Click to read more
Next available: Mon, Jun 22

Dr. Brian T Lai, DO

Primary Care Doctor
5.00
·3 reviews
- Sep 17, 2025 by Brenda M.Click to read more
16 mi · 4300 Rose Dr, Yorba Linda, CA 92886
Accepts Aetna, BlueCross BlueShield, Cigna + 10 more
Also offers video visits · Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Dr. Brian Lai is a board-certified Family Medicine physician who is born and raised in Southern California. He completed medical school at Western University of Health Sciences, College of Osteopathic Medicine of the Pacific in Pomona. After medical school, he completed his Family Medicine residency...Click to read more
Next available: Wed, May 6

Regina Robertson, NP

Family Nurse Practitioner
5.00
·5 reviews
Provider listened and provided good feedback and information pertaining to my issues. A clear plan was communicated to address my health problems. Regina was caring and empathetic. - Mar 31, 2026 by Marcia S.Click to read more
16.5 mi · 4646 Brockton Ave, Ste 201, Riverside, CA 92506
Accepts Aetna, BlueCross BlueShield, Cigna + 15 more
Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Regina Robertson, MSN, APRN, FNP-BC, is a compassionate and experienced Nurse Practitioner with more than 30 years in nursing and advanced clinical care. She is dedicated to providing thoughtful, patient-centered primary care that focuses on both physical and emotional well-being. Regina holds a Mas...Click to read more
Next available: today

Carbon Health Urgent Care - Placentia

Urgent Care Clinic
4.85
·71 reviews
I like to use Zocdoc for finding a doctor. It's convenient and save the time to make a appointment with the doctor. - Aug 6, 2025 by Lina W.Click to read more
17 mi · 858 N Rose Dr, Placentia, CA 92807
Accepts Aetna, BlueCross BlueShield, Cigna + 19 more
Accepting new patients · Excellent wait time ·
Read bio
Carbon Health combines smart technology and modern design to help make high-quality, inclusive, and personal healthcare accessible to all. With our convenient urgent care locations, we treat a full spectrum of health needs including cold, COVID and flu symptoms, urinary tract infections, sinus infec...Click to read more
Next available: today

Dr. Sabrina Cooley, MD

Primary Care Doctor
3.63
·27 reviews
The conversation with the doctor felt very rushed and dismissive. I felt as if my questions were not fully being heard or answered. The door also kept opening while I was in the examining position which made me feel very uncomfortable.Click to read more
20 mi · 1321 N Hbr Blvd, Ste 205, Fullerton, CA 92835
Accepts Aetna, BlueCross BlueShield, Cigna + 43 more
Accepting new patientsExpertise in schizophrenia + 1 more

Dr. Katia Alfaro Felix, MD

Primary Care Doctor
4.43
·121 reviews
Office staff and RN were very nice and their follow up was great. - Oct 3, 2024 by Thomas C.Click to read more
20 mi · 1321 N Hbr Blvd, Ste 205, Fullerton, CA 92835
Accepts Aetna, BlueCross BlueShield, Cigna + 43 more
Accepting new patients

Dr. Natalie Marino, MD

Primary Care Doctor
4.05
·20 reviews
Overall this was a pretty productive doctor's appointment, I felt very heard and while she ran through things quickly she made sure to take the time to explain everything in depth. I also felt her knowledge of my medical conditions was a lot more up-to-date than previous doctors were which I find in...Click to read more
20 mi · 1321 N Hbr Blvd, Ste 205, Fullerton, CA 92835
Accepts Aetna, BlueCross BlueShield, Cigna + 43 more
Also offers video visits · Accepting new patients ·
Read bio
Dr. Natalie Marino is a compassionate physician board-certified in Family Medicine. She practices both Primary Care General Medicine, as well as Dermatology. She received her Medical Degree, as well as a Masters in Public Health, from the University of Pittsburgh. She completed her residency trainin...Click to read more

Dr. Mark Giglio, MD

Primary Care Doctor
18 mi · 955 W Imperial Hwy, Ste 110, Brea, CA 92821
Accepts Aetna, BlueCross BlueShield, Cigna + 19 more
Also offers video visits · Accepting new patients · 25+ years of experience · Expertise in chronic high blood pressure + 9 more ·
Read bio
Dr. Mark Giglio is a family medicine doctor in Brea, California and is affiliated with St. Jude Medical Center. He received his medical degree from University of Virginia School of Medicine and has been in practice for more than 20 years.Click to read more
Next available: Thu, May 14

Carbon Health Urgent Care - Corona

Urgent Care Clinic
4.84
·76 reviews
Quick and efficient. Got out of there in minute and medication at my pharmacy and home within an hour. Feeling tons better! - Dec 8, 2025 by Rocio M.Click to read more
18.5 mi · 3955 Bedford Canyon Rd, Ste 103, Corona, CA 92883
Accepts Aetna, BlueCross BlueShield, Cigna + 16 more
Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Carbon Health combines smart technology and modern design to help make high-quality, inclusive, and personal healthcare accessible to all. With our convenient urgent care locations, we treat a full spectrum of health needs including cold, COVID and flu symptoms, urinary tract infections, sinus infec...Click to read more
Next available: today

Dr. Marienelle Banez, MD

Pediatrician
5.00
·30 reviews
16 mi · 4300 Rose Dr, Ste E, Yorba Linda, CA 92886
Accepts Aetna, BlueCross BlueShield, Cigna + 9 more
Also offers video visits · Accepting new patients · 25+ years of experience · Highly recommended ·
Read bio
Please note that this provider only sees children and adolescents under the age of 18. There is nothing more important to me than the health and safety of your children. As a strong advocate of vaccinations, I believe that ensuring the children who visit our office are fully vaccinated is the sin...Click to read more
Next available: tomorrow

Dr. Saagar Raju, MD

Family Physician
5.00
·2 reviews
Great experience with the doctor - Feb 17, 2026 by David W.Click to read more
16.5 mi · 4013 Brockton Ave, Riverside, CA 92501
Accepts Aetna, BlueCross BlueShield, Cigna + 25 more
Accepting new patients · Highly recommended · Excellent wait time · Expertise in chronic high blood pressure + 1 more ·
Read bio
Please review a few things when booking with me: Before booking, please make sure the location works for you. We have a number of locations in the Inland Empire. We collect deductibles, copays at the time of service. If you have any questions or concerns, please call your insurance before your visi...Click to read more
Next available: Wed, Apr 29

Dr. Johnny Wu, MD

Primary Care Doctor
5.00
·1 review
It was quick, simple, and helpful. Got everything I needed in matter of minutes. They understood my specific request and adapted quickly. - Nov 13, 2025 by Simon B.Click to read more
20 mi · 2141 N Harbor Blvd, Fullerton, CA 92835
Accepts Aetna, BlueCross BlueShield, Cigna + 10 more
Also offers video visits · Accepting new patients · Highly recommended · Excellent wait time · Expertise in upper respiratory infection (uri) + 2 more ·
Read bio
Dr. Johnny Wu is a board-certified Internal Medicine physician with St. Jude Heritage Medical Group. He received his medical degree from Saint Louis University in 2019 and finished Internal Medicine residency at the University of Illinois, Chicago in 2022. Dr. Wu's clinical interests include preven...Click to read more
Next available: Fri, May 8

Brittany A Camille, NP

Nurse Practitioner
4.94
·80 reviews
Brittany and Mary were great, thank you for your help and making me feel comfortable. - Apr 10, 2026 by Ashley N.Click to read more
16.5 mi · 4646 Brockton Ave, Ste 201, Riverside, CA 92506
Accepts Aetna, BlueCross BlueShield, Cigna + 10 more
Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Brittany Camille brings over a decade of diverse nursing experience to Altais Medical Group Riverside. Her background in primary care and medical-surgical units has given her a comprehensive understanding of patient care needs. Brittany chose to become a Family Nurse Practitioner for the opportunity...Click to read more
Next available: tomorrow

Dr. Larissa Isterabadi, MD

Pediatrician
4.97
·32 reviews
16 mi · 4300 Rose Dr, Ste E, Yorba Linda, CA 92886
Accepts Aetna, BlueCross BlueShield, Cigna + 9 more
Also offers video visits · Accepting new patients · 25 years of experience · Highly recommended · Excellent wait time ·
Read bio
Please note that this provider only sees children and adolescents under the age of 18. There is nothing more important to me than the health and safety of your children. As a strong advocate of vaccinations, I believe that ensuring the children who visit our office are fully vaccinated is the singl...Click to read more
Next available: Thu, Apr 23

Dr. Howard Pyo, DO

Family Physician
4.88
·1263 reviews
What a breath of fresh air. A doctor who seemed happy to be there with you ! - Aug 6, 2023 by Kathy F.Click to read more
19 mi · 2000 E Chapman Ave, Ste 100, Fullerton, CA 92831
Accepts Aetna, BlueCross BlueShield, Cigna + 11 more
Also offers video visits · Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
DISCLAIMER: Pyo Clinic is a learning facility but patient permission is ALWAYS sought before we include residents/students in their care. If patient prefers to see only Dr. Pyo, we fully respect their choice and will not include residents or students in their care. All of our patients are GUARANTEED...Click to read more
Next available: today

Dr. Jon Kramer, MD

Pediatrician
5.00
·31 reviews
- Nov 8, 2025 by Aries A.Click to read more
16 mi · 4300 Rose Dr, Ste E, Yorba Linda, CA 92886
Accepts Aetna, BlueCross BlueShield, Cigna + 9 more
Also offers video visits · Accepting new patients · 25+ years of experience · Highly recommended · Excellent wait time ·
Read bio
Please note that this provider only sees children and adolescents under the age of 18. I love being able to help families through the joys and challenges of raising happy, healthy children. It's a remarkable thing to sign a teenager's health form for college and remember the first time you saw that...Click to read more
Next available: Thu, Apr 23

Angela Huusfeldt, APRN, RN, NP

Family Nurse Practitioner
5.00
·3 reviews
Angela was a great communicator and followed up when necessary after the appointment to confirm that I had my questions answered. The office did have me wait about 45-55 minutes after I arrived a bit late. I inputted the wrong address and called ahead that I’d be about 15 minutes late. The front d...Click to read more
17 mi · 500 S Anaheim Hills Rd, Ste 246, Anaheim, CA 92807
Accepts Aetna, BlueCross BlueShield, Cigna + 24 more
Accepting new patients · Highly recommended · Expertise in high cholesterol ·
Read bio
Angela Huusfeldt is a Family Medicine Nurse Practitioner dedicated to providing compassionate, patient-centered care for individuals and families across all stages of life. She earned her nursing degree from San Diego State University and began her career in the Neonatal Intensive Care Unit at CHOC ...Click to read more
Next available: tomorrow

Carbon Health Urgent Care - La Habra

Urgent Care Clinic
4.90
·60 reviews
The staff was friendly and prompt. I got a last minute appointment on a Sunday evening and was seen right away. - Jun 10, 2024 by KATRINA G.Click to read more
20.5 mi · 1040 W Imperial Hwy, La Habra, CA 90631
Accepts Aetna, BlueCross BlueShield, Cigna + 19 more
Accepting new patients · Highly recommended · Excellent wait time ·
Read bio
Carbon Health combines smart technology and modern design to help make high-quality, inclusive, and personal healthcare accessible to all. With our convenient urgent care locations, we treat a full spectrum of health needs including cold, COVID and flu symptoms, urinary tract infections, sinus infec...Click to read more
Next available: today

Dr. Matthew Im, MD

Primary Care Doctor
25 mi · 24119 Hemlock Ave, Ste 104, Moreno Valley, CA 92557
Accepts Aetna, BlueCross BlueShield, Cigna + 20 more
Also offers video visits · Accepting new patients ·
Read bio
Dr. Matthew Im is a family physician at Rancho Family Medical Group’s Moreno Valley office. He grew up in Temecula and was inspired to pursue medicine by his father, Dr. Tae Im, who has long been part of Rancho Family. Early experiences on medical mission trips to Haiti and the Philippines further s...Click to read more
Next available: tomorrow

Dr. Eddie Wilcox Shum, DO

Primary Care Doctor
21.5 mi · 2501 E Chapman Ave, Ste 306, Orange, CA 92869
Accepts Aetna, BlueCross BlueShield, Cigna + 10 more
Accepting new patients ·
Read bio
Dr. Eddie Shum is a Family Medicine physician practicing in Orange County, CA.Click to read more
Next available: Fri, May 8

Dr. David Joung, MD

Pediatrician
5.00
·30 reviews
16 mi · 4300 Rose Dr, Ste B, Yorba Linda, CA 92886
Accepts Aetna, BlueCross BlueShield, Cigna + 9 more
Also offers video visits · Accepting new patients · Highly recommended ·
Read bio
Please note that this provider only sees children and adolescents under the age of 18. As a father of two adventurous and energetic boys, I understand the journey of parenthood, which often feels like a roller-coaster ride. When children are doing well and healthy, there is no greater joy and rew...Click to read more
Next available: Wed, Apr 29

Dr. Vincent Pan, DO

Primary Care Doctor
23 mi · 845 W La Veta Ave, Orange, CA 92868
Accepts Aetna, BlueCross BlueShield, Cigna + 10 more
Also offers video visits · Accepting new patients ·
Read bio
Dr. Vincent Pan is a board certified Family Medicine physician. An Orange County native, he completed medical school at Touro Nevada College of Osteopathic Medicine before finishing his residency at Loma Linda University Health. He has clinical experience in FQHC, private practice, preventative heal...Click to read more
Next available: Mon, Apr 27

Dr. Christine Wilson, MD

Pediatrician
4.31
·16 reviews
16 mi · 4300 Rose Dr, Yorba Linda, CA 92886
Accepts Aetna, BlueCross BlueShield, Cigna + 19 more
Also offers video visits · Accepting new patients ·
Read bio
Dr. Christine Wilson is a general pediatrician in Yorba Linda, CA. She completed her undergraduate studies at Baylor University in Texas, and attended medical school at Texas A&M College of Medicine. She moved back to southern California to the area where she grew up to complete her internship and r...Click to read more
Next available: Mon, May 4

Dr. Billy Zhang, MD

Primary Care Doctor
5.00
·1 review
24.5 mi · 13400 Jamboree Rd, Ste 200, Irvine, CA 92602
Accepts Aetna, BlueCross BlueShield, Cigna + 10 more
Also offers video visits · Accepting new patients · Highly recommended ·
Read bio
Dr. Billy Zhang is a board-certified Internist with an eclectic background, having trained in Philadelphia, Pennsylvania and working as a primary care provider in Brooklyn, New York. Dr. Zhang's area of interest is providing patient centered care, understanding the best way to team up and address bo...Click to read more
Next available: tomorrow

Dr. Henry Cheng, MD

Family Physician
4.64
·116 reviews
He is my kind of doctor I would highly recommend him to anyone by David S.Click to read more
17 mi · 500 S Anaheim Hills Rd, Ste 246, Anaheim, CA 92807
Accepts Aetna, BlueCross BlueShield, Cigna + 8 more
Accepting new patients · Excellent wait time · Expertise in chronic diabetes + 4 more ·
Read bio
Dr. Henry Cheng is a board-certified family medicine physician. He received his medical degree from the American University of the Caribbean School of Medicine and completed his family medicine residency at Mercy Medical Center in Redding, California. Outside of his practice, Dr. Cheng enjoys mount...Click to read more
Next available: Wed, Apr 29

Dr. Karoline Wang, MD

Primary Care Doctor
4.40
·5 reviews
Friendly professional - Sep 5, 2025 by Antonio N.Click to read more
24.5 mi · 13400 Jamboree Rd, Ste 200, Irvine, CA 92602
Accepts Aetna, BlueCross BlueShield, Cigna + 10 more
Accepting new patients · Excellent wait time ·
Read bio
Dr. Karoline Wang is a board-certified Internal Medicine doctor. She graduated from the Medical College of Wisconsin and completed her internship and residency training in internal Medicine at the California Pacific Medical Center in San Francisco. Dr. Wang also has a Masters in Public Health (MHSC)...Click to read more
Next available: Fri, Apr 24
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Zocdoc lets you search specifically for an Ontario Primary Care Doctor who takes your insurance. Just choose your carrier and plan from the drop-down menu at the top of the page. If you’re not sure which plan you have, you can use Zocdoc’s insurance checker to find out.

How can I book an appointment online with a Primary Care Doctor in Ontario?

Zocdoc is a free online service that helps patients find Doctors in Ontario and book appointments instantly. You can search for Ontario Doctors by symptom or visit reason. Then, choose your insurance plan. Based on that information, you’ll see a list of providers who meet your search criteria, along with their available appointment slots.

How can I find a female Primary Care Doctor in Ontario?

When you search for Ontario Doctors on Zocdoc, you can filter your results by gender, in addition to other criteria. That way, you’ll only see Doctors in Ontario who match your preferences.

How can I find an Ontario Primary Care Doctor who sees patients after hours?

On Zocdoc, you can search specifically for Ontario Doctors with availability after 5 p.m.

How can I find a top-rated Primary Care Doctor in Ontario?

You can use Zocdoc to find Doctors in Ontario who are highly rated by other patients. These ratings are based on verified reviews submitted by real patients. Every time a patient completes an appointment booked on Zocdoc, they’re invited to review their experience. Each review must comply with Zocdoc’s guidelines.

How can I find a video visit with a Primary Care Doctor online in Ontario?

Doctors in Ontario on Zocdoc who see patients through online video visits will have a purple video icon on their profiles. You can also filter your search results to show only Doctors who offer video visits.

Are video visits with a Primary Care Doctor online covered by my insurance?

Most insurers provide coverage for video visits at the same cost as in-person visits. You can search on Zocdoc specifically for Doctors in Ontario who accept your insurance for video visits by selecting your carrier and plan from the drop-down menu at the top of the page. We recommend you check with your insurance carrier directly to confirm your coverage and out of pocket costs for video visits.

How can I find a Primary Care Doctor in Ontario who sees patients in the morning or evening?

Zocdoc lets you search specifically for a Primary Care Doctor who has appointments available before 10:00 am, or after 5:00 pm. Just choose the special hours filter at the top of our search page.

How can I find a Primary Care Doctor in Ontario who sees patients during the weekend?

Zocdoc let's you see real-time availability for Doctors in Ontario. Many Doctors offer appointments on Saturdays and Sundays.

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Zocdoc›Doctors›Orange County, CA›Ontario, CA