
Dr. Ronald Markos, MD
Gastroenterologist
521.5 mi · 817 Lawn Avenue, Sellersville, PA 18960
At a glance
4.84 stars (25 reviews)
97% are satisfied with this provider ·
Accepts 19 insurances
Aetna, BlueCross BlueShield, Cigna, Medicare, UnitedHealthcare, more+ ·
Has 20+ years of experience
Graduated from Drexel University, Doctor of Medicine
Works at The Center for GI Health
3 office locations
4.84
25 reviews
Bedside manner
4.8
Wait time
4.4
Recent reviews
It is very hard to find docs that have the same kindness, and interest as we experienced 30 plus years ago. Having an appointment with Dr. Markos, was like stepping back in time, in the best way possible. He is very smart, and just as importantly, interested, easy to talk to, very kind, friendly and cheerful. I would say in my opinion he is the holy grail of doctors.
I have a multitude of complicated medical problems and that is not good news, in the era of HMO's. Doctors are no longer afforded the luxury of time to treat their patients anymore. However you would never know it, as Dr Markos spent an extremely generous amount of time treating me. Just another aspect that makes him far above all of his peers. Quite frankly he made me feel like I made a new friend, and that is something that is just as important to someone who is ill, as the actual medical treatment itself. It is also something that is nearly impossible to find these days.
So if I were asked to rate Dr Markos on a scale of 1 to 10, I would have to say 11.
He said he would like to see me when I have a certain condition, and just to call when it occurs and they would fit me into the schedule. A specialist offering to fit their new patient into the schedule? Well I think my jaw may have hit the floor from shock.
Needless to say I think he is fabulous, and will doubtless stay his patient as long as the is practicing medicine.
September 9, 2017Melanie O.Verified patient
Dr. Markos is an excellent GI doc! He listened to me, conducted appropriate tests and diagnosed my illness. His treatment plan has been effective and he is thorough in long-term treatment.
More than 1 year agoInitials hidden
Office locations
1
1.
The Center for GI Health
521.5 mi · 817 Lawn Avenue, Sellersville, PA, 18960
2
2.
The Center for GI Health
527.6 mi · 909 Sumneytown Pike, Spring House, PA, 19477
3
3.
The Center for GI Health
522.9 mi · 815 Sumneytown Pike, Suite 210, Lansdale, PA, 19446
Ronald Markos does not participate in Zocdoc to offer online booking at this time
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In-network insurances
Aetna
BlueCross BlueShield
Cigna
Medicare
UnitedHealthcare
Aetna
BlueCross BlueShield
Cigna
Medicare
Areas of expertise
This doctor's experience enhances their expertise in similar cases. Below are the conditions or surgeries they treat most frequently.
Acid reflux
Chronic Inflammatory Bowel Disease (IBD)
Acute hemorrhoids
Colonoscopy
Upper GI endoscopy
Acute stomach inflammation/infection
Acid reflux
Chronic Inflammatory Bowel Disease (IBD)
Acute hemorrhoids
Colonoscopy
More about Dr. Ronald Markos, MD
Dr. Markos was trained at Hahnemann University Hospital and has been part of the practice since 1992. Every year he learns more about himself and his calling as a physician. Dr. Markos has a goal to always improve himself for the sake of his patients who rely on him. He strives to apply these skills with compassion and understanding with the hope that his patients will experience these priorities. Dr. Markos met his wife when they were teenagers in his church’s youth group. They went to college in Central New Jersey and eventually in Philadelphia. They have two children and he draws his strength and the balance for his life from his family.
Education & experience
Education
Medical School - Drexel University, Doctor of Medicine
Hahnemann University Hospital, Fellowship in Gastroenterology
Practice
The Center for GI Health
Certifications
Gastroenterology (Internal Medicine)
Awards and publications
Castle Connolly Top Doctor
Background
Languages spoken
English
Gender
Male
NPI number
#1851399786
Ronald Markos does not participate in Zocdoc to offer online booking at this time
Similar providers on Zocdoc
Top-rated
Closest to you
Available today

Paul Mensah, NP
Gerontology Nurse Practitioner
27 mi5050 Parkside Ave, Philadelphia, PA, 19131
Â
27 mi5050 Parkside Ave, Philadelphia, PA, 19131
Â

Dr. Elizabeth Wetterer, MD
Family Physician
28 mi5201 Haverford Ave, Philadelphia, PA, 19139
Â
28 mi5201 Haverford Ave, Philadelphia, PA, 19139
Â

Dr. Noi Walkenstein, DO
Primary Care Doctor
4.605 reviews
29 mi3717 Chestnut St, Ste 202, Philadelphia, PA, 19104
Â
4.605 reviews
29 mi3717 Chestnut St, Ste 202, Philadelphia, PA, 19104
Â
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Dr. Uzma Kewan, MD
Primary Care Doctor
4.7788 reviews
24 mi1205 Langhorne-Newtown Road, Suite 208, Langhorne, PA, 19047
Next available: Apr 28Offers telehealth
4.7788 reviews
24 mi1205 Langhorne-Newtown Road, Suite 208, Langhorne, PA, 19047
Next available: Apr 28Offers telehealth

Dr. Stacey Zavala, MD
Gastroenterologist
4.95110 reviews
35 mi807 North Haddon Avenue, Suite 201, Haddonfield, NJ, 08053
Â
4.95110 reviews
35 mi807 North Haddon Avenue, Suite 201, Haddonfield, NJ, 08053
Â

Dr. Jack Devita, MD
Gastroenterologist
4.8840 reviews
37 mi106 Creek Crossing Blvd, Hainesport, NJ, 08036
Â
4.8840 reviews
37 mi106 Creek Crossing Blvd, Hainesport, NJ, 08036
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Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.84
Wait time
4.38
Bedside manner
4.83
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
25 reviews
Most relevant
Well done, although I'd rather be playing golf. Everyone here is extremely helpful & professional.
More than 1 year agoRH
Great experience!!! Look forward to working with such a knowledgable doctor to improve my health.
More than 1 year agoInitials hidden
He was extremely easy to talk to and very professional. I think he is a very good fit for me.
More than 1 year agoInitials hidden
I recommend The Center for GI Health,Dr. Ronald Markos,& his staff are very pleasant.
September 13, 2017Nancy T.Verified patient
It is very hard to find docs that have the same kindness, and interest as we experienced 30 plus years ago. Having an appointment with Dr. Markos, was like stepping back in time, in the best way possible. He is very smart, and just as importantly, interested, easy to talk to, very kind, friendly and cheerful. I would say in my opinion he is the holy grail of doctors.
I have a multitude of complicated medical problems and that is not good news, in the era of HMO's. Doctors are no longer afforded the luxury of time to treat their patients anymore. However you would never know it, as Dr Markos spent an extremely generous amount of time treating me. Just another aspect that makes him far above all of his peers. Quite frankly he made me feel like I made a new friend, and that is something that is just as important to someone who is ill, as the actual medical treatment itself. It is also something that is nearly impossible to find these days.
So if I were asked to rate Dr Markos on a scale of 1 to 10, I would have to say 11.
He said he would like to see me when I have a certain condition, and just to call when it occurs and they would fit me into the schedule. A specialist offering to fit their new patient into the schedule? Well I think my jaw may have hit the floor from shock.
Needless to say I think he is fabulous, and will doubtless stay his patient as long as the is practicing medicine.
September 9, 2017Melanie O.Verified patient
Dr. Markos is an excellent GI doc! He listened to me, conducted appropriate tests and diagnosed my illness. His treatment plan has been effective and he is thorough in long-term treatment.
More than 1 year agoInitials hidden
I was happy to get an appointment the same day.
Appointment was right on time and the staff and Dr.Markos were very accommodating.
His exam was thorough and he carefully explained to me all my options.
October 11, 2016George V.Verified patient
Very informative
September 19, 2016Robert M.Verified patient
Dr. Markos hardly spent time with me as a patient. I saw him on three separate occasions including an endoscopy. On each of the occasions, my appointments lasted a total of 5-7 minutes each. He didn't seem interested in wanting to know how I was feeling or getting to know me as a patient. I wish I went to the 2nd opinion doctor the first time around.
More than 1 year agoInitials hidden
Short & pleasant
More than 1 year agoInitials hidden
Professional and friendly. He listened.
February 24, 2016Michael O.Verified patient
Dr Markos is, by far, the kindest and most confident dr I have worked with. He performed a surgery for my sister and she was so pleased with his demeanor that she recommended him to me. I have been working with a previous GI for the last year with no success. Dr Markos is giving me hope for a diagnosis which is something I haven't had in almost a decade. He is kind, caring, respectful and very comforting. He explains things extremely well. I have nothing but wonderful things to say!
June 27, 2014Leah M.Verified patient
Excellent.
More than 1 year agoJH
Very informative and not rushed.
More than 1 year agoLK
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What practice does Dr. Ronald Markos work with?
Dr. Ronald Markos works with The Center for GI Health.
Where is Dr. Ronald Markos's office located?
Dr. Ronald Markos has 3 office locations, including in Sellersville, Spring House, and Lansdale, view full addresses on Dr. Markos's profile.
Which board certifications does Dr. Ronald Markos have?
Dr. Ronald Markos is certified by Gastroenterology (Internal Medicine).
What are common reasons for patients to see Dr. Ronald Markos?
Dr. Ronald Markos frequently sees patients for Colon Cancer Screening, Colonoscopy, Diarrhea, Gastroenterology Consultation, and Hemorrhoids. You can see other visit reasons for Dr. Ronald Markos on their profile.
What languages does Dr. Ronald Markos speak?
Dr. Ronald Markos speaks English.
How do patients rate Dr. Ronald Markos in reviews?
25 patients have reviewed Dr. Ronald Markos. The overall rating for this doctor is 4.84/5. They have a 4.83/5 rating for bedside manner and a 4.38/5 rating for wait time. You can read individual reviews and ratings on their profile.