Highlights
Age Groups Seen
- Adult
Languages
- English
Gender
FemaleLocations
- Cleveland Clinic Main Campus
- 9500 Euclid Avenue, Cleveland, OH 44195
- Get Directions
- Medical Outpatient Center, Lakewood
- 16215 Madison Avenue, Lakewood, OH 44107
- Get Directions
Education & Board Certifications
Education
- Graduate School: Marietta College, 2020
- Undergraduate: University of Dayton, 2018
- Undergraduate: University of Akron, 2014
Board Certifications
- Physician Assistant: National Commission on Certification of Physician Assistants, 2020
Research & Publications
See publications for this provider. (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
Cleveland Clinic physicians and scientists collaborate with industry to advance medical breakthroughs. These partnerships help commercialize discoveries for public benefit while maintaining scientific integrity. To ensure transparency and minimize potential bias, Cleveland Clinic reviews these relationships and publicly discloses when physicians/scientists receive significant compensation for consulting, serve in fiduciary roles, receive royalties, or hold equity interests related to their work. We manage potential conflicts through approval processes, annual reporting, and targeted management plans.
As of 2025-10-02, Dr. Grenfell 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.
Insurances Accepted
Ratings & Reviews
5 out of 5
188 ratings, 25 reviewsThe Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
- 5 out of 5 starsReviewed on 4/8/2026
Kathryn is my favorite provider to see. She is so wonderful at explaining options and I love having her as my migraine specialist! She has really helped me with the frequency and duration of my migraines and I have my life back!
- 5 out of 5 starsReviewed on 4/6/2026
Very great experience, Kathryn shows she is knowledgeable and cares a lot for my health. She does a recap at the end too, to summarize everything. Amazing experience so far within two visits.
- 5 out of 5 starsReviewed on 3/30/2026
PA Grenfell has treated my headache condition for a number of years and has always rendered me outstanding care and treatment. I have done very well with her guidance and medical advice.
- 5 out of 5 starsReviewed on 3/11/2026
Katherine is always friendly yet professional, thorough, and I trust her with my medical needs.
- 5 out of 5 starsReviewed on 3/6/2026
I would highly recommend Kathryn Grenfell for neurological needs. She is am amazing listener, provides options, and ensures I understand and am comfortable with the treatment plan.
- 5 out of 5 starsReviewed on 2/23/2026
Kathryn Grenfell is absolutely the best. She is always so respectful, caring and friendly. She is brilliant. A true asset to cleveland clinic.
- 5 out of 5 starsReviewed on 1/14/2026
Kathryn is a very thorough provider and listens to your concerns and will advocate for you. She includes you in your care and gives you the best treatment options. She's very personable and knowledgeable. Also has great bedside manner.
- 5 out of 5 starsReviewed on 1/9/2026
She was very to the point and thorough
- 5 out of 5 starsReviewed on 1/9/2026
I absolutely Love this staff and the dr.
- 5 out of 5 starsReviewed on 12/18/2025
Kathryn is a wonderful provider.
- 5 out of 5 starsReviewed on 12/8/2025
Kathryn Grenfell is great. I originally got an appointment with her in order to be seen more quickly. She listened to me so well that I switched over to her. I would recommend her to others with my same issues.
- 5 out of 5 starsReviewed on 10/13/2025
She is very good, fast, but knows when to pause and give a break.
- 5 out of 5 starsReviewed on 9/22/2025
Kathryn is always smiling and knows how to make the patients visit a good experience. She is always willing to go above and beyond to answer any questions or concerns that I may have.
- 5 out of 5 starsReviewed on 9/8/2025
I switched from another provider because of Kathryn's ability to listen, her expertise, her calm, pleasant demeanor, and her ability to put me at ease. I would highly recommend her!
- 5 out of 5 starsReviewed on 8/19/2025
Kathryn is one of the best care providers I've ever had in my life. This is saying quite a bit, as CC's Neurology Department is full of some of the best. I happen to think Kathryn would be a good candidate to teach others her skills in the field- as her level of professionalism is very high.
- 5 out of 5 starsReviewed on 8/4/2025
I've has 6 injections and all were handled with care. The care provider provided good information regarding botox.
- 5 out of 5 starsReviewed on 8/4/2025
Another excellent video visit with Dr. Grenfell. She is very familiar with me & my issues. It is very easy to converse with her about my treatment strategy. I have confidence in her judgment & recommendations.
- 5 out of 5 starsReviewed on 7/14/2025
I've reccomended her to another person already. She gives the best Botox shots for migraines.
- 5 out of 5 starsReviewed on 6/16/2025
She is a wonderful doctor. Very caring, listens to all concerns. I would highly recommend her to anyone seeking an excellent doctor.
- 5 out of 5 starsReviewed on 6/16/2025
Kathryn Grenfal is outstanding She listened to my concerns, she explains everything thoroughly, she is easy to talk to. I appreciate her very much
- 5 out of 5 starsReviewed on 6/9/2025
Most professional delightful kind caring thorough intelligent confident PA ever
- 5 out of 5 starsReviewed on 5/19/2025
I truly appreciated the courtesy and respect shown by my care provider during the visit. She took the time to listen carefully, answered my questions thoroughly, and made me feel valued and understood.
- 5 out of 5 starsReviewed on 5/8/2025
Talking with Kathryn is like talking with a friend. She is very personable, and I feel she really cares about my issues. :-)
- 5 out of 5 starsReviewed on 4/28/2025
First time meeting her , she was very professional and kind ! Would definitely recommend
- 5 out of 5 starsReviewed on 4/28/2025
Kathryn is just the best. Professional, caring, intelligent always takes the time to help me. There are not enough adjectives to describe just how wonderful she is. I always look forward to my appointment with her.