What patients are saying
Overall rating
4.75
Average wait time
4.70
Bedside manner
4.91
“Dr. Thomas is an excellent physician. His diagnosis and treatment helped me overcome some sinus issues.”
Sam P.February 11, 2026
“Dr. Alex Thomas was everything one could want in a doctor. He listened carefully to my symptoms and history then patiently explained a thorough treatment plan along with alternatives. I have had mixed experiences with video calls with doctors, but Dr. Thomas was an excellent listener and communicator.”
William K.September 4, 2025Video visit
About Dr. Alex Thomas
Dr. Alex Thomas is a board-certified specialist in Pediatrics and Adult Allergy and Immunology. He earned his MD at Rush University Medical College and completed his Pediatrics Residency and Fellowship in Adult and Pediatric Allergy/Immunology at the University of Wisconsin-Madison.
The Center for Asthma and Allergy has been serving the Chicagoland area for over 30 years, founded by Dr. Dolly Thomas. Dr. Alex Thomas (her son) joined the practice 7 years ago and has enjoyed seeing patients in Chicago’s Northwest side, Wicker Park and the Northwest Suburbs. Services provided include allergen desensitization, skin testing (food allergens, environmental allergens, drugs), patch testing (chemical/cosmetic allergy), biologic therapies (Anti-IgE, Anti-IL5, Anti-IL4/IL13), graded food and drug challenges, drug desensitization, Spirometry, medication management, asthma education, immune system evaluation and more.
He has a particular interest in patient education and creates educational materials for patients and families
Dr. Thomas is affiliated with Amita Saint Mary and Elizabeth Medical Center, Advocate Illinois Masonic Medical Center, Advocate Lutheran General Hospital and Northwest Community Hospital.
"I believe that medical care is a true collaboration between my patients and myself. Taking the time to truly listen is critical to finding the best individualized management plan for each of my patients. My goal is educate my patients about their disease process so that they can be empowered to make informed decisions about their health."
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In-network insurances
99% of patients have successfully booked with these insurances
Aetna
BlueCross BlueShield
Cigna
UnitedHealthcare
Areas of expertise
This doctor's experience enhances their expertise in similar cases. Below are the conditions or surgeries they treat most frequently.
Asthma
Chronic nose and throat inflammation due to allergies
Allergic skin reaction with hives
Asthma
Chronic nose and throat inflammation due to allergies
Allergic skin reaction with hives
Office locations
Dr. Alex Thomas, MD also offers online video visits for patients
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Education and background
Practice names
Hospital affiliations
- Advocate Illinois Masonic Medical Center
- Advocate Lutheran General Hospital
- Northwest Community Hospital
- Saints Mary and Elizabeth Medical Center - Saint Elizabeth Campus
Board certifications
- American Board of Allergy and Immunology
Education and training
- Medical School - Rush University, Doctor of Medicine
- University of Wisconsin Hospital and Clinics, Fellowship in Allergy and Immunology
- Northwestern University (Bachelor's)
- University of Wisconsin Hospital and Clinics, Residency in Pediatrics
- University of Wisconsin Hospital and Clinics, Internship in Pediatrics
Languages spoken
- English
Provider's gender
Male
NPI number
1265632574
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.75
Wait time
4.70
Bedside manner
4.91
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
61 reviews
Most relevant
Dr. Thomas is an excellent physician. His diagnosis and treatment helped me overcome some sinus issues.
February 11, 2026Sam P.Verified patient
Dr. Thomas is the best! He explains things so well and always answers all of my questions and addresses all my concerns
More than 1 year agoInitials hiddenVideo visit
A great listener and very efficient I was able to get the help I needed right away.
July 21, 2025Madelynn M.Verified patientVideo visit
My appointment was at 3:30 but I arrived at 2:00 because of my schedule and they saw me right away!
October 8, 2024Darlene N.Verified patient
Fabulous doc!! super nice, knowledgeable, and explained things so thoroughly and clearly. highly recommend!
September 13, 2023Samantha E.Verified patientVideo visit
Dr. Thomas listened to my history, set up testing, and we discussed a future plan. I recommend.
July 3, 2023Karen J.Verified patient
Very personable. Explains well his plan of care with the patient.
September 14, 2024Perlinda D.Verified patientVideo visit
Very kind, helpful, informative. Reviewed my documents beforehand
August 11, 2023Hala A.Verified patient
Dr. Alex Thomas was everything one could want in a doctor. He listened carefully to my symptoms and history then patiently explained a thorough treatment plan along with alternatives. I have had mixed experiences with video calls with doctors, but Dr. Thomas was an excellent listener and communicator.
September 4, 2025William K.Verified patientVideo visit
I wasn’t sure how seeing an allergist on line was going to work. But Dr.Thomas was great. He listened to my concerns and asked great questions to get a thorough health history. I left the appointment with next steps and am confident he will help me find relief from my long term allergy symptoms. I would highly recommend!
June 18, 2025Dawn S.Verified patientVideo visit
The doctor no call no showed me. I called the office twice trying to get clear instructions before my appointment, and was sent to voicemail both times. I left a voicemail asking to have my call returned and it was not. I never received an email or anything regarding my Telehealth appointment other than a confirmation stating that I DID have an appointment.
May 29, 2025Emma D.Verified patientVideo visit
super helpful and great listener!
January 5, 2024Sara K.Verified patient
They called me 2 days before my appointment to tell me my appointment was going to be virtual yet they didn't provide any further explanation as to where virtually I would get access to this. I called the office the day before to get further explanation and more information but no one called me back. I showed up to the office and no one was there just in case I misunderstood. Eventually I noticed the email with the Zoom link meeting sent that morning. Dr. Thomas was very nice but I was not happy with the visit. They said they would order some blood tests and instructed me to go to a center to have them draw my blood for allergy testing and they would provide me and send me links to the centers that were closest to me. Yet I have yet to receive any further links or instructions to where I'm supposed to go 3 hours later. So now I have to take another day off from work at some point to go to this blood center that I still don't know where it is.
December 27, 2023Karina D.Verified patient
Dr. Alex was incredibly knowledgeable and and an amazingly thorough professional. He ensured that I got the information I was seeking out, building a plan to help manage my allergies and the ways my life is affected by them. Genuine and truly cares about his clients!
December 20, 2023Craig M.Verified patient
Thank you Dr Thomas
November 9, 2023Cindy G.Verified patient
Dr. Thomas was great and helped me figure out what I was specifically allergic to and what solutions we could do for medications. Him and the nurses took great care of me. I will definitely be back for anything allergy related in the future!
October 30, 2023Initials hidden
Dr. Thomas was very good at explaining the next steps and listening and answering my questions. I am thankful that he offers virtual visits, too.
October 19, 2023Initials hiddenVideo visit
Dr. Alex Thomas is the best! He really takes the time to listen, figure out what is going on/address & explain the underlying issue(s), and make clear treatment recommendations. It’s easy to get ahold of him and/or schedule an appointment with him. He always thoroughly addresses my questions and concerns. And he is empathetic, personable, and compassionate. I highly recommend Dr. Thomas!
August 30, 2023Erin C.Verified patientVideo visit
Great. Like typical visit.
More than 1 year agoMA
Excellent service
February 21, 2022Sherinmol J.Verified patient
very well knowledge
January 4, 2022Mirela U.Verified patient
Dr. Thomas takes the time listen to my concerns and makes sure that I understand what the next steps are and the reasons behind them. His bedside manner is so positive, and I felt comfortable asking questions. The staff at the office are also very friendly and attentive. Checking in went very smoothly, because I was able to give them my information prior to coming in to the office. He also offers virtual visits which was very convenient for us when just needed a general follow up. I highly recommend Dr. Thomas.
August 30, 2021Initials hidden
Excellent professional
More than 1 year agoVanya K.Verified patient
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January 30, 2026Maja P.Verified patient
January 5, 2026Brooke S.Verified patient
December 30, 2025Jaylanie R.Verified patient
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June 12, 2025Claudia M.Verified patientVideo visit
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January 9, 2024Donnalee D.Verified patient
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December 23, 2023Carrie M.Verified patientVideo visit
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October 26, 2023Natalie S.Verified patient
September 14, 2023Ismael C.Verified patient
September 13, 2023Raquel Lynn W.Verified patientVideo visit
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How soon can I make an appointment with Dr. Alex Thomas?
Generally, Dr. Alex Thomas has appointments available on Zocdoc within 1 week. You can see Dr. Thomas's earliest availability on Zocdoc and make an appointment online.
Is Dr. Alex Thomas accepting new patients?
Dr. Alex Thomas generally accepts new patients on Zocdoc. You can see Dr. Thomas's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. Alex Thomas accept my insurance?
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Can I make an appointment with Dr. Alex Thomas online?
Yes, you can make an appointment online with Dr. Thomas using Zocdoc. It’s simple, secure, and free.
Which hospital is Dr. Alex Thomas affiliated with?
Dr. Alex Thomas is affiliated with Advocate Illinois Masonic Medical Center, Advocate Lutheran General Hospital, and Northwest Community Hospital.
What practice does Dr. Alex Thomas work with?
Dr. Alex Thomas works with Center for Asthma & Allergy.
Where is Dr. Alex Thomas's office located?
Dr. Alex Thomas has 4 office locations, including in Chicago and Mount Prospect, view full addresses on Dr. Thomas's profile.
Which board certifications does Dr. Alex Thomas have?
Dr. Alex Thomas is certified by American Board of Allergy and Immunology.
What are common reasons for patients to see Dr. Alex Thomas?
Dr. Alex Thomas frequently sees patients for Allergy Consultation, Allergy Testing, Rash, Sinus Problems / Sinusitis, and Sore Throat. You can see other visit reasons for Dr. Alex Thomas on their profile.
What languages does Dr. Alex Thomas speak?
Dr. Alex Thomas speaks English.
How do patients rate Dr. Alex Thomas in reviews?
61 patients have reviewed Dr. Alex Thomas. The overall rating for this doctor is 4.75/5. They have a 4.91/5 rating for bedside manner and a 4.7/5 rating for wait time. You can read individual reviews and ratings on their profile.