Emergency icon Important Updates
Department Ophthalmology
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English
Surgeon Yes
Cleveland Clinic Main Campus
Primary Location

Cleveland Clinic Main Campus


Additional Locations

Specialties & Treatments

Treatment & Services

  • Cataract Evaluations
  • Cataract Implant Surgery
  • Cataract Surgery
  • Eye Examinations
  • Intraocular Lens Implantation
  • Ophthalmic Surgery
  • Ophthalmology
  • Phacoemulsification
View all 8 Treatment & Services +

Specialty in Diseases & Conditions

  • Cataracts
View all 1 Specialties +


Is Cleveland Clinic Part of Your Insurance?

Review a list of accepted insurance plans for our Northeast Ohio locations or learn more about purchasing a contracted managed care plan.

View All Plans

About Gregory Kosmorsky, DO

Gregory S. Kosmorsky, DO, is a Staff Physician in the Department of Ophthalmology at Cleveland Clinic Cole Eye Institute.

Dr. Kosmorsky's clinical interests include cataract surgery. He has been named a "Best Doctor" by Cleveland Magazine (2007-2008).

He completed his DO at Philadelphia College of Osteopathic Medicine in Philadelphia, Pa., in 1979. Then he finished a rotating internship at Delaware Valley Medical Center, Langhorne, Pa., and a residency focusing on adult neurology at Temple University Hospital in Philadelphia, Pa. He completed two fellowships, the first in ophthalmology at Cleveland Clinic and a second one in neurology/ophthalmology at Washington University Medical Center in St. Louis, Mo.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic
Cleveland, OH

Fellowship - Washington University Medical Center
St. Louis, MO

Residency - Temple University Hospital
Adult Neurology
Philadelphia, PA

Internship - Delaware Valley Medical Center
Rotating Internship
Langhorne, PA

Medical Education - Philadelphia College of Osteopathic Medicine
Philadelphia, PA

Undergraduate - Temple University
Philadelphia, PA


  • Psychiatry and Neurology - Neurology
  • Ophthalmology

Specialty Interests

Cataract Surgery, neuro-ophthalmology, Refractive Surgery, Strabismus

Awards & Honors

  • Cleveland Magazine, Best Doctors 2007-2008

Research & Publications

Research & Publications

See publications for Gregory Kosmorsky, DO.

(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 7/17/2023, Dr. Kosmorsky has reported no financial relationship with industry that is applicable to this listing. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

Patient Satisfaction Reviews

453 Patient Satisfaction Reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Cleveland Clinic.

Overall Star Ratings
4.7 out of 5
Explains 4.7
Courtesy, Respect & Concern 4.7
Patient Rating of Doctor 4.7

44 Patient Comments

Reviewed on Jun 11, 2024

It is always a pleasure to see Dr Kosmorsky, he's an excellent doctor and a good man

Reviewed on Jun 10, 2024

Doctor was very informative and very professional.

Reviewed on Jun 6, 2024

Excellent experience from assistant and dr.

Reviewed on May 28, 2024

I have been seeing Dr. Kasmorsky for over 8 years. He is very personable and knowledgeable about his field. He always eases nerves or worries. I will always recommend him.

Reviewed on May 28, 2024

Dr. And staff do an excellent job.

Reviewed on May 20, 2024

Perhaps, this trend is an ongoing involving interaction of patient & provider however, I'm very personal & donot care for outsiders knowing certain knowledge concerning myself period

Reviewed on Apr 25, 2024

Best doctor in town

Reviewed on Apr 9, 2024

Dr. Kosmorsky is very knowledgeable and professional

Reviewed on Mar 28, 2024

Dr. Kosmorsky is always very kind and explains all his procedures clearly.

Reviewed on Mar 21, 2024

Haven't been to a eye doctor in years he was patient and very informative

Reviewed on Mar 15, 2024

Everyone I talked to was professional and helpful from setting up an appointment that was convenient for me to administering my eye exam which I thought was very thorough. Then Dr. Kormosky came into the room and took his time explaining every thing that was going to take place with the surgery and answering all my questions. I felt at ease and in great hands looking forward to seeing better in a few weeks.

Reviewed on Mar 14, 2024


Reviewed on Feb 23, 2024

Love that doctor he told me more in one appointment than my past Optometrist did is the last 5 yrs. Will be back like he said in 2 yrs!

Reviewed on Feb 22, 2024

Doctor was excellent in all aspects addressing the issue and providing treatment.

Reviewed on Feb 20, 2024

Enjoyed optometrist who was very friendly & helpful. Dr. K was very efficient-told me all was well & I had 20/20 vision & all was wellThen I got a call telling me labs had been ordered-I was surprised & wondered why?!

Reviewed on Feb 13, 2024

Dr was very good

Reviewed on Feb 13, 2024

Very kind and personable physician .

Reviewed on Jan 30, 2024

Doctor, has a lot of patients, but he works very hard at accommodating my experience.

Reviewed on Jan 30, 2024

Glad to be a new patient of Doctor Kormosky, my wife was so impressed with him and his staff, since my cataract surgery, she is now a new patient also.

Reviewed on Jan 23, 2024

Greg is a fantastic physician, and I couldn't recommend him more!

Reviewed on Jan 16, 2024

I've seen this doctor for some time. He's very good. I appreciate him very much.

Reviewed on Dec 21, 2023

Dr K. He's great !

Reviewed on Dec 7, 2023

Very satisfied with Doctor and the office.

Reviewed on Nov 30, 2023

Dr. Kosmorsky's appearance was fleeting. He was direct with his findings, albeit brief in their discussion. He prescribed an over the counter supplement and then proceeded to disparage the vitamin industry. My reason for the visit was to discuss a condition I had had in the past and what I should do if it re-occurred. I was not satisfied with his response to this. He exited, not having asked me if he could help me with anything more.

Reviewed on Nov 30, 2023

Dr. Korsmorsky always goes above and beyond with my eye care

Reviewed on Nov 20, 2023

She did a thorough job and was very courteous.

Reviewed on Nov 10, 2023

Very informative doctor and nurse.

Reviewed on Nov 2, 2023

He's the best listens to every question.

Reviewed on Oct 24, 2023

I have recommended Dr. Kosmorsky to several people.

Reviewed on Oct 5, 2023

Dr. Kosmorsky took time with me and my questions.

Reviewed on Sep 26, 2023

Dr. Kosmorsky was very friendly, professional and answered all my questions.

Reviewed on Sep 26, 2023

He was a very great provider

Reviewed on Sep 26, 2023

Dr. Kosmorsky is fantastic. Please keep him at the Clinic forever.

Reviewed on Aug 31, 2023

She was wonderful

Reviewed on Aug 31, 2023

Very unprofessional. Showed no concern or offered any explanation of my condition. I was shocked at the flipped response from Dr Kormosky

Reviewed on Aug 31, 2023

The Dr. Did not acknowledge me when he entered the room. I was a new patient. He told me I had macular degeneration. Did not answer my questions. Told me nothing about it except I had it. Offered me no treatment plan except to take vitamins. Did not explain anything. I was upset and angry at my treatment as a new patient. I will not ever recommend him and am searching for a specialist now to help me understand what it anything I can do. The staff was good. He had no concern.

Reviewed on Aug 29, 2023

Thought staff and Dr were very nice

Reviewed on Aug 21, 2023

Excellent Doctor!!!

Reviewed on Aug 10, 2023

Dr K is always pleasant, is willing to explain things, etc.

Reviewed on Aug 10, 2023

I was very satisfied with the care I received from Dr.Kosmorsky!

Reviewed on Aug 8, 2023

Love Dr. Greg Kosmorsky!

Reviewed on Aug 8, 2023

Had to wait 45 minutes on dr. After nurse finish her work

Reviewed on Jul 31, 2023

Dr. Kosmorsky was very personable and exceeded my expectations. His knowledge was evident and I highly recommend his office!

Reviewed on Jul 27, 2023

Dr. KOSMORSKY was very knowledgeable and kind. Very reassuring.

Back to Top