Gwyneth Ellen Markowitz, PA
Physician Assistant · Mentor, OH
Gwyneth Ellen Markowitz, PA is a physician assistant with a practice address in Mentor, Ohio, and NPI 1124904479, issued on Aug 13, 2025. Check the license with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gwyneth Ellen Markowitz
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 9485 Mentor Ave, Mentor, OH 44060
- Phone
- (440) 701-6612
- Enumerated
- Aug 13, 2025
- Record last updated
- Aug 13, 2025
- Medicare enrollment
- Enrolled (PECOS I20251007002560); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 5,325 in Ohio → Look up another NPI →
Also registered at 9485 Mentor Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gwyneth Ellen Markowitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Lake Hospital System, Inc.Willoughby, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gwyneth Ellen Markowitz among 5,325 physician assistant records in Ohio
Gwyneth Ellen Markowitz, PA is one of 5,325 physician assistant records with a practice address in Ohio. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 88% of them.
- NPI issued2025 · 88% of these records are older, 4% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2025 · median 2019 among the 3,621 with a school on file
- Record last updated2025 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 physician assistant records list a practice address in Mentor
They are 18 of the 1,824 NPPES records with a practice address in Mentor, and 5,325 physician assistant records in Ohio.
All 5,325 in Ohio → Every provider in Mentor → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Abigail Cicero, PA-CMentor, OH 440601649813700
- Adrienne Colabuno, PA-CMentor, OH 440601194002006
- Anna Gray, PA-CMentor, OH 440601932609161
- Susan Hollobaugh, P.A.Mentor, OH 440601710181532
- Courtney Kozek, PA-CMentor, OH 440601821547274
- Kendra Mariacher, PA-CMentor, OH 440601518570373
- Rachel McKernan, P.A.Mentor, OH 440601275243404
- Kelly O'Connor, PA-CMentor, OH 440601841534336
Common questions
What is Gwyneth Ellen Markowitz, PA's NPI number?
Gwyneth Ellen Markowitz, PA's National Provider Identifier (NPI) is 1124904479, issued on Aug 13, 2025. An NPI identifies a provider in billing; it is not a license.
Where is Gwyneth Ellen Markowitz, PA located?
The NPPES record lists a practice address at 9485 Mentor Ave, Mentor, OH, 44060. Phone: (440) 701-6612. Providers update this record themselves, so call before visiting.
How can I verify Gwyneth Ellen Markowitz, PA's license?
Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.