Respiratory Virus and Vaccine Information

Practice Focus Areas

This medical professional has a particular interest or expertise in:

Advanced Cardiac Imaging
Aortic Valve Disease
Cardiomyopathy
Echocardiography
General Cardiology
Mitral Valve Disease
Structural Heart Disease
Valvular Heart Disease

Education

Medical Education:: MD, Loyola University Stritch School of Medicine - 2013
Residency:: Mayo Clinic College of Medicine and Science (Rochester) - 2016
Fellowships:: Mayo Clinic College of Medicine and Science (Rochester) - 2021

Languages Spoken

Farsi

Board Certifications

American Board of Internal Medicine - Internal Medicine (Certified)
American Board of Internal Medicine/Cardiovascular Disease - Cardiovascular Disease (Certified)
Certification Board of Nuclear Cardiology(CBNC) - Nuclear Cardiology (Certified)
National Board of Echocardiography - Basic Perioperative Transesophageal Echocardiography (Certified)

Faculty Profile

Clinical Assistant Professor, Feinberg School of Medicine

View Faculty Profile

Practice Groups and Affiliations

Medical Group:: Northwestern Medical Group
Alignment Category:: Northwestern Medicine Physician Network
On Medical Staff At:: Catherine Gratz Griffin Lake Forest Hospital

Northwestern McHenry Huntley & Woodstock Hospitals

Northwestern Memorial Hospital

Ratings and Reviews

At Northwestern Medicine, our patient’s feedback is important to us. While different care providers have their own unique strengths, we strive to be as transparent as possible with our quality of care.

Read Ratings FAQs

Overall Rating

4.9

4.9

618 Ratings

Reviews from Patients

89 Reviews

Reviews from Patients

89 Reviews

February 22, 2026

5.0

All of above and excellent results

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 18, 2026

5.0

Dr. Sharain demonstrates his caring and knowledge when he meets with me. I feel I'm in very capable hands.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 18, 2026

5.0

He's knowledgeable, patient and informative

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 16, 2026

5.0

Dr. Sharain shows much concern for my wellbeing.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 16, 2026

5.0

He is very congenial, professional, and easy to talk with. He doesn't rush the appointment.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 15, 2026

5.0

He is a fantastic listener. He's friendly and smiles easily, remembers me and our conversations at my 6 month appointments, helps me with a plan. Confident but never ever arrogant. He's everything I want in a physician

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 11, 2026

5.0

I am a new patient and just had open heart surgery a month ago and he checked my heart and health concerns. He was very informative and followed up HB. He was very kind and knowledgeable. I am very grateful he took me as his patient.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 11, 2026

5.0

Dr Sharain is top notch. He is greatly knowledgeable, caring bc he takes time to listen. Fine bedside manners

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 09, 2026

5.0

Friendly, thorough and patience

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 06, 2026

5.0

Great cardiologist. My hushand who had been a patient of Dr. [last name] will also become a patient of Dr. Sharain.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 04, 2026

5.0

Dr. Sharain is an excellent physician, very knowledgeable and Professional...

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 04, 2026

5.0

He reviewed my health and asked for my update. Plan was explained and he fully answered my questions. He listened.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 03, 2026

5.0

Because he's great

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 17, 2026

5.0

Well treated.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 14, 2026

5.0

Dr.Sharain made me feel comfortable, explained everything to me and had an excellent bedside manner.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 31, 2025

5.0

His caring and sharing ... feels like family!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 31, 2025

5.0

He gave straight forward information and a plan for my issues

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 31, 2025

5.0

See above. Very professional. Old Dr Robins, from Endover, would say your beautiful and 3 minutes later he was gone.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 30, 2025

5.0

He is a wonderfully caring doctor who listens well and explains things clearly when asked questions or providing a diagnosis

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 27, 2025

5.0

Responds to your question... knows what he is doing...explains your condition and is not only concerned with heart , but your whole body.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 26, 2025

5.0

Good counsel.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 17, 2025

5.0

Thorough evaluation and good communication.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 17, 2025

5.0

Very knowledgeable, calm demeanor and through exam. Very professional but relatable.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 17, 2025

5.0

He is personable and professional. His office staff is friendly and efficient.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 12, 2025

5.0

Easy to talk to. Personable.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 11, 2025

5.0

Very knowledgeable. Excellent communication skills. EXCELLENT DOCTOR for heart patients.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 05, 2025

5.0

I would recommend Dr Sharain because he was very helpful and patient centered.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 02, 2025

5.0

friendly, thorough, confidence in his judgment

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 28, 2025

5.0

Genuine concern... great bedside care...

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 26, 2025

5.0

He was very informative, and I feel confident that he will safeguard my health

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 21, 2025

5.0

First time meeting him....very professional.....took his time and really listened to my mom and her concerns.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 20, 2025

5.0

Knowledgeable and professional

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 06, 2025

5.0

The Dr is available always to listen and he has a great sense of humor

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 04, 2025

5.0

Professional, attentive and patient

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 03, 2025

5.0

competence and care

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 31, 2025

5.0

He's professional while at the same time make me feel completely comfortable . He always explains everything so that I know what it means.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 29, 2025

5.0

Smart and approachable

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 27, 2025

5.0

Dr. Sharain is very calm and kind listening to what I had to say and explained in detail. His exam note was exactly what he said, simple to understand. I recommend Dr. Sharain.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 23, 2025

5.0

Dr. Sharain answers all questions thoroughly, and never seems rushed. He has an excellent bedside manner.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 22, 2025

5.0

Incredibly gifted cardiologist who is skilled, knowledgeable and very personable. He rocks!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 03, 2025

5.0

Very caring and knowledgeable doctor who places his patients at ease under difficult circumstances.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 01, 2025

5.0

Knowledge, skill, and caring

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 01, 2025

5.0

Dr. Sharain is professional, a good listener, answered all of my questions and spent enough time with me.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 16, 2025

5.0

He is kind, competent, knowledgeable cardiologist, who truly cares for his patients.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 12, 2025

5.0

Very caring.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 12, 2025

5.0

He explained everything carefully, listened to my concerns and answered all my questions. Actions plans laid out. Very clear. Felt cared for and not rushed in the slightest.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 10, 2025

5.0

He really cares about his patients and always goes the extra mile

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 31, 2025

5.0

Great patient manner

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 27, 2025

5.0

Knows his medicine makes you feel comfortable.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 27, 2025

5.0

Very kind, takes his time, gets to a solution . Wish we would have started a long time ago with him.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 27, 2025

5.0

Awesome Dr

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 25, 2025

5.0

see the comment above. Also he is thoughtful.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 25, 2025

5.0

Dr. Sharain was just great to see and speak with. He's just so competent and thorough and accommodating. I feel I can ask him questions about my condition without hesitation. He has a really good "bedside" manner.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 25, 2025

5.0

Cares about the patient. Follows up. Intelligent.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 18, 2025

5.0

Excellent and compassionate

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 07, 2025

5.0

Understood my case.even though he is just starting to take over.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 06, 2025

5.0

Feel that I get tremendous care from Dr. Sharain.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 06, 2025

5.0

Great doctor,knowledgeable and friendly

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 06, 2025

5.0

Dr. Sharain addresses my concerns appropriately. He does a thorough assessment and is skillful and compassionate.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 04, 2025

5.0

Highly professional and very courteous doctor.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

August 03, 2025

5.0

Because I like northwestern hospital good experience

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 30, 2025

5.0

He is interested in your care and on tome.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 29, 2025

5.0

Dr. Sharain spends quality time with his patients, explains everything in laymen's terms and has a great personality. I always look forward to seeing him.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 20, 2025

5.0

See above. Have confidence in his knowledge and judgment

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 17, 2025

4.0

Dr Sharain was very nice, he brought in a student (no problem). He ordered a stress test, heart monitor and set up appt to see him in 6 months.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 17, 2025

5.0

Same as above . A credit to the hospital!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 17, 2025

5.0

Great doctor

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 16, 2025

5.0

Dr. Sharain brings excellence, compassion, and charisma to each visit.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 09, 2025

5.0

Dr. Sharain possesses the knowledge and expertise necessary to keep patients confident that they are receiving the best care possible.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 07, 2025

5.0

Doctor Sharain was the consummate professional who thoroughly explained his diagnosis and possible treatment plan.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 07, 2025

5.0

Dr. Sharain has a wonderful doctor to patient personality. Takes the time to listen & explains questions, concerns clearly.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

July 02, 2025

5.0

Kind, understanding and make you feel comfortable

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

June 30, 2025

4.0

I would have given him a 10, but only first visit. BUT, VERY pleased so far. Need a few more visits, before recommending him.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

June 30, 2025

5.0

I also feel he knows exactly what I need for my care. Dr Sharain is the best!!!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

June 19, 2025

5.0

A knowledgable physician who cares about the health and needs of his patients.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

June 16, 2025

5.0

Brilliant Doctor !

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

June 16, 2025

5.0

He listens and is generally concerned about his patents

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

June 11, 2025

5.0

Very personable, professional and obviously knows is craft!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

June 04, 2025

5.0

Dr. Sharain reviewed my history and tests and discussed the results with me. He was very patient and there were a lot of numbers and terms that I needed help understanding.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 28, 2025

5.0

Very professional, courteous, knowledgeable and a good listener.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 21, 2025

5.0

Thoughtful. Good listener.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 21, 2025

5.0

Very pleased with my care

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 19, 2025

5.0

Very smart and kind man

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 19, 2025

5.0

Dr is very patient. Listens to us and our concerns. Answers all of our questions.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 11, 2025

4.0

Dr Sharain is an excellent and caring Dr. He listens to his patients.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 09, 2025

5.0

Take time for you and listens

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 08, 2025

5.0

Excellent

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 05, 2025

5.0

Dr. Sharain, is focused, a great listener, communicates clearly/concisely and is effective in making the patient feel comfortable and not overwhelmed.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

May 05, 2025

5.0

Very caring, makes you feel comfortable and confident in care he gives.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

Disclosures

Korosh Sharain, MD reported no external professional relationships for calendar year 2024.

External Professional Relationships

Pharmaceutical, device, and biotechnology companies frequently collaborate with basic scientists and physicians within an academic medical center to help advance science and improve patient care. These relationships are important in achieving scientific breakthroughs and in establishing the effectiveness and safety of promising new therapies. In order to assure objectivity in clinical research and patient care, the Northwestern University Feinberg School of Medicine (Feinberg), Northwestern Memorial HealthCare, Children's Hospital of Chicago Medical Center, and the Shirley Ryan AbilityLab have adopted integrity policies that require research and clinical faculty (in full-time, part-time, and unpaid/voluntary categories) to report compensated and uncompensated external industry relationships. Patients are encouraged to discuss these disclosures with their physician as well as to inquire as to how these relationships are overseen by Feinberg. To learn more about our Disclosure and Professional Integrity Policy, and the conflict of interest policies of our joint affiliate survey partners, please go to our Office for Regulatory Affairs Policies page.

View More Disclosures