Riley McKeown, PA-C
Physician Assistant · Portland, ME
Riley McKeown, PA-C is a physician assistant with a practice address in Portland, Maine, and NPI 1598414443, issued on Mar 19, 2022. Check the license (Maine PA2415, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Riley McKeown
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA2415 ME
1847 NH
Self-reported in NPPES; status is on the state search - Practice location
- 191 Marginal Way, Portland, ME 04101
- Phone
- (207) 571-7991
- Enumerated
- Mar 19, 2022
- Record last updated
- Nov 16, 2023
- Medicare enrollment
- Enrolled (PECOS I20230126001045); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 979 in Maine → Look up another NPI →
Also registered at 191 Marginal Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Camilla Horton, PA-CPhysician Assistant1598443939
- Rachel Matusko, FNP-CFamily Nurse Practitioner1477249837
- Cassandra O'Connor, FNP-BCFamily Nurse Practitioner1316719594
Verify Riley McKeown in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license PA2415Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average physician assistant in 2024
243 Medicare Part D claims for 188 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Amoxicillin-Clavulanate Potass38 claims
- Doxycycline Monohydrate36 claims
- Ofloxacin17 claims
- Albuterol Sulfate Hfa14 claims
- Cephalexin14 claims
- Prednisone14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Convenientmd - Ffs UC LLCSanford, ME
- Mercy HospitalGorham, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Riley McKeown among 979 physician assistant records in Maine
Riley McKeown, PA-C is one of 979 physician assistant records with a practice address in Maine. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 77% of them.
- NPI issued2022 · 77% of these records are older, 17% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2021 · median 2017 among the 648 with a school on file
- Record last updated2023 · 47% 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 Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
243 physician assistant records list a practice address in Portland
They are 243 of the 6,022 NPPES records with a practice address in Portland, and 979 physician assistant records in Maine.
All 979 in Maine → Every provider in Portland → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Victoria Davis, PA-CPortland, ME 041011609817691
- Ellen Jankowski, PA-CPortland, ME 041011417963109
- Lorraine Laliberte, PACPortland, ME 041011982673638
- Jennifer Landry, PA-CPortland, ME 041011790740835
- Michelle Lavigne, PAPortland, ME 041011720025703
- Elizabeth Levesque, PA-CPortland, ME 041011982641833
- Stephen Parenteau, PA-CPortland, ME 041011558308403
- Elizabeth Peterson, PA-CPortland, ME 041011952450231
Common questions
What is Riley McKeown, PA-C's NPI number?
Riley McKeown, PA-C's National Provider Identifier (NPI) is 1598414443, issued on Mar 19, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Riley McKeown, PA-C located?
The NPPES record lists a practice address at 191 Marginal Way, Portland, ME, 04101. Phone: (207) 571-7991. Providers update this record themselves, so call before visiting.
How can I verify Riley McKeown, PA-C's license?
NPPES lists Maine license number PA2415, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
How much does Riley McKeown, PA-C prescribe under Medicare Part D?
In 2024, Riley McKeown, PA-C had 243 Medicare Part D claims for 188 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions 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.