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Department Neurology
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English
Surgeon No
Locations Specialties & Treatments

Treatment & Services

  • Cerebrovascular Neurology
  • Clinical Evaluation, Diagnosis and Treatment
  • Neurovascular Ultrasound
  • Stroke Epidemiology
  • Stroke Prevention
  • Thrombolytic Therapy
View all 6 Treatment & Services +

Specialty in Diseases & Conditions

  • Acute Stroke
  • Atherosclerosis
  • Brain Hemorrhage
  • Carotid Artery Disease
  • Carotid Bruit
  • Central Nervous System Vasculitis
  • Cerebral Vasculitis
  • Cerebrovascular Disease
  • Cerebrovascular Occlusive Disease
  • Hemorrhagic Stroke
  • Intracranial Atherosclerosis
  • Intracranial Stenosis
  • Moyamoya Disease
  • Seizures
  • Stroke
  • Syringomyelia
  • Transient Ischemic Attack (TIA)
  • Vertebrobasilar Insufficiency
  • Von Hippel-Lindau Disease (VHL)
View all 19 Specialties +


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Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Graduate School - Case Western Reserve University School of Medicine
Epidemiology & Biostatistics
Cleveland, OH USA

Fellowship - Cleveland Clinic
Cerebrovascular Disease
Cleveland, OH USA

Residency - Cleveland Clinic
Cleveland, OH USA

Internship - Riverside Methodist Hospital
Preliminary Medicine
Columbus, OH USA

Medical Education - Ohio State University Hospital (Columbus)
Internal Medicine
Columbus, Oh United States (Archived)

Undergraduate - Kenyon College
Gambier, OH USA

Professional Highlights

  • Director, Center for Outcomes Research and Evaluation, Neurological Institute
  • Medical Director, Patient-Entered Data


  • Psychiatry and Neurology - Vascular Neurology
  • Psychiatry and Neurology - Neurology

Specialty Interests

cerebrovascular disease, neurovascular ultrasound, secondary stroke prevention, stroke outcomes, health information technology, patient-reported outcomes

Awards & Honors

  • Pacesetter Award for Excellence in Stroke Research and Treatment (2006), American Stroke Association, Northeastern Ohio Branch
  • Michael Pessin Stroke Leadership Award, American Academy of Neurology (2006)
  • Distinguished Achievement Award,  American Heart Association, Ohio Valley Affiliate (2004)
  • Best Doctors in America (2003-2004, 2005-2006, 2007,2008)
  • Award of Excellence, American Heart Association, Northeastern Ohio Branch (2003)
  • I.H. Page Center for Health Outcomes Research Award (2001)
Research & Publications

Research & Publications

See publications for Irene Katzan, MD.

(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 10/3/2023, Dr. Katzan 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

36 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
4.9 out of 5
Explains 4.9
Listens 5
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

11 Patient Comments

Reviewed on Jan 22, 2024

Dr made it a great experience. Very empathetic and listened

Reviewed on Jan 22, 2024

Dr. Katzan is highly competent and was well prepared for the visit. She truly listened to my concerns and was thorough in her analysis. I left the visit with a high level of confidence that I was in great hands with Dr. Katzan.

Reviewed on Jan 16, 2024

Don't care for telemedicine but Dr. Katzan's office was very helpful planning and supporting.

Reviewed on Jan 16, 2024

Dr. Katzan is very present, suggesting and responsive.

Reviewed on Jan 16, 2024

Dr. Katzan very good doctor. Prefer in person to telemedicine.

Reviewed on Jan 16, 2024

Dr Katzan has taken an interest in my healthcare since Day 1 in 2017. I really appreciate her and her concern for being cautious in ensuring to the best of her ability that I dont' experience another TIA

Reviewed on Jan 2, 2024

She is very caring and can explain in terms I understand. I very much appreciate that care she gave to me. Ty.

Reviewed on Oct 23, 2023

The doctor and staff were professional and courteous

Reviewed on Sep 25, 2023

Great Doctor

Reviewed on Jun 12, 2023

Very good Dr.

Reviewed on May 9, 2023

Dr. Katzen thoroughly explained all the finding from the MRI report and showed me on the image what the report was referencing. I felt so much more calm at the end of the visit.

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