Dr. Mark S. O'brien, MD | Carmel, IN | Family Physician

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Dr. Mark O'Brien is a family medicine physician with 38 years of experience providing comprehensive care to patients of all ages. He earned his medical degree from Indiana University School of Medicine and has dedicated nearly four decades to helping families maintain their health and wellness. Dr. O'Brien speaks both Spanish and English, allowing him to serve a diverse patient population throughout his practice.

Dr. O'Brien practices at IU Health Primary Care in Carmel, Indiana, and maintains affiliations with Indiana University Health North Hospital and IU Health Saxony Hospital. His expertise encompasses adolescent medicine and adult primary care, with a focus on routine and preventive care services. He treats a wide range of conditions including anxiety, allergies, and abnormal uterine bleeding. Patients have given Dr. O'Brien an average rating of 2.2 stars on Vitals.

Overview based on verified provider data

2.1

13 Ratings
38 years of experience
30 insurance plans accepted
speaks Spanish, English
Indiana University School Of Medicine
10 written reviews
1 specialty
7 areas of expertise
3 board certifications
2 hospital affiliations
1 office location
Male

13 ratings & reviews

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Showing 1 to 10 of 10 reviews

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I have been seeing Dr. O'Brien for years. He is quick and accurate. I've never had a single problem with his service. Recommended.

January 19th, 2024

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Worst doctor ever. He was in the room literally 3 minutes and would not answer any questions. VERY RUDE

November 7th, 2022

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Dr. O'Brien diagnosed my gout and high blood pressure. He actually listened to me when I told him I wanted to do things as naturally as possible, he is a great doctor!

November 29th, 2021

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Stated we had significant philosophical difference in our views medical care and treatment, Dr. O'Brien advised that I seek a new primary doctor. I never gave my views during our interaction and he was aware I had bad experiences with prior doctors. All of sudden after I asked to see a GI he mentions we have differences. I'm sure other doctors spoke to him after our visit. He didn't mention any concerns during our visit. This is very unprofessional. I don't recommend IU doctors at all. It's like a high-school where doctors spread gossip. The front office staff at IU always seem agitated and at times rude depending on who you speak with. I just think it's odd to mention our differences when we never discussed it. I'm relieved to move on from IU very big disappointment.

April 27th, 2021

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He basically told me my son needs a psychiatrist when he was not getting better! Went to get a second opinion and Found out he has terrible viral infection (mono)! Terrible chairside manners, he kept repeating that he is the one with the degree. The staff is great though, its sad that these nice girls have to work with such a jerk

September 22nd, 2015

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Staff is great...but the Dr. could care less how you feel, he talks to hear himself talk

September 22nd, 2015

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Horrible bed side manner! Rude, inconsiderate, would not take my dog to him!

May 4th, 2013

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I would not recommend this doctor. Although he may be very qualified his bedside manner leaves a lot to be desired!

September 4th, 2012

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my son had a tonsillar abscess that had missed by 2 other physicians and dr. obrien diagnosed it and my son had emergency surgery that night. I can't express my gratitude enough, I feel he saved my sons life.

April 15th, 2012

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The diagnosis in the room was allergies not the diagnosis on the release paper Broncitius. Ordered a chest Xray to prove my husand wrong that he only had allerges. Actual said "Results were clear just as I knew they would be. Then was told if he was not better in 2 weeks assume that after 6 weeks he has throat cancer until proven other wise by a ENT. Irony: My husband refuses to go to a dr because he says you dont have cancer until you go to a dr.

December 20th, 2011

IU Health Primary Care - Carmel - IU Health Spring Mill Professional Building

10300 N Illinois St Ste 1000Carmel, IN 46290

Tel: (317) 688-5626

Mon8:00 am - 5:00 pm

Tue8:00 am - 5:00 pm

Wed8:00 am - 5:00 pm

Thu8:00 am - 5:00 pm

Fri8:00 am - 5:00 pm

SatClosed

SunClosed


Dr. Mark S O'brien, MD	Dr. Ann Arno, DO	Dr. Mark Benson, DO	Dr. Ikechukwu Ozoigbo, MD
Family Medicine	Family Medicine	Family Medicine	Family Medicine
	Accepts New Patients	Accepts New Patients
2.1 (13 Ratings)	4.5 (12 Ratings)	4.5 (10 Ratings)	2.8 (4 Ratings)
38 Years of Experience	27 Years of Experience	37 Years of Experience	36 Years of Experience
No Virtual Visit Option	No Virtual Visit Option	No Virtual Visit Option	No Virtual Visit Option
Speaks Spanish, English	Speaks English	Speaks English	Speaks English
Carmel , IN	Indianapolis , IN	Indianapolis , IN	Indianapolis , IN
Med School: Indiana University School Of Medicine	Med School: Des Moines University College of Osteopathic Medicine and Health Sciences	Med School: Des Moines University College of Osteopathic Medicine and Health Sciences	Med School: University of Calabar, Coll of Med Sci, Calabar, Cross River, Nigeria
Current Profile	View Profile	View Profile	View Profile

Search for your insurance and plan

Family Medicine

Check-up
Contraception
Family Planning
Immunization
Influenza
Weight Loss
Weight Loss (non-surgical)

MEDICAL LICENSE

Medical Doctor, Indiana, 2025, Expired

EDUCATION & TRAINING

Medical School

Indiana University School Of MedicineGraduated in 1989

Indiana University School Of MedicineGraduated in 1988

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Is Dr. Mark O'brien accepting new patients?: Dr. Mark O'brien has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
What languages does Dr. Mark O'brien speak?: Dr. Mark O'brien speaks Spanish and English.
Does Dr. Mark O'brien accept my insurance?: You can see the insurance plans that Dr. Mark O'brien accepts on their Vitals profile.
Does Dr. Mark O'brien accept virtual/telehealth appointments?: Dr. Mark O'brien has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Which hospitals is Dr. Mark O'brien affiliated with?: Dr. Mark O'brien is affiliated with Indiana University Health North Hospital and Iu Health Saxony Hospital.

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