Joshua Andrew Keller, M.D.
Rheumatology Physician · Portland, ME
Joshua Andrew Keller, M.D. is a rheumatology physician with a practice address in Portland, Maine, and NPI 1578975439, issued on May 27, 2014. Check the license (Maine MD21587, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Joshua Andrew Keller
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- MD21587 ME
Self-reported in NPPES; status is on the state search - Practice location
- 51 Sewall St, Portland, ME 04102
- Phone
- (207) 774-5761
- Enumerated
- May 27, 2014
- Record last updated
- Sep 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170811001248); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 26 in Maine → Look up another NPI →
Also registered at 51 Sewall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Catherine Crute, MDFamily Medicine Physician1508834441
- Brian Daikh, MDSpecialist1184617953
- Elizabeth Evans, PA-CMedical Physician Assistant1366616252
- Edward Fels, MDSpecialist1508086083
- Stephanie Gartner-Fanburg, MDRheumatology Physician1619914587
- Brian Keroack, MDSpecialist1891788659
Verify Joshua Andrew Keller in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD21587Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average rheumatology physician in 2024
2,017 Medicare Part D claims for 437 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 67 claims were for opioids.
Most prescribed
- Prednisone546 claims
- Methotrexate309 claims
- Hydroxychloroquine Sulfate176 claims
- Allopurinol147 claims
- Alendronate Sodium99 claims
- Methylprednisolone56 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.
The MIPS final score for 2023 (Medicare payment program): 98.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
2 hospitals and group practices
- York HospitalYork, ME · Acute Care Hospitals4 of 5 stars
- Rheumatology Associates P.A.Portland, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Joshua Andrew Keller among 26 rheumatology physician records in Maine
Joshua Andrew Keller, M.D. is one of 26 rheumatology physician records with a practice address in Maine. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 77% of them.
- NPI issued2014 · 77% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2014 · median 2009 among the 14 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Maine
There are 26 rheumatology physician records in Maine.
All 26 in Maine → Every provider in Portland → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Stephanie Gartner-Fanburg, MDPortland, ME 041021619914587
- Diana Vradii, M.D.Brunswick, ME 040111972768166
- Lee Kendall, MDLewiston, ME 042401265420590
- Charles Molta, MDLewiston, ME 042401225253792
- Sean Stanhope, D.O.Lewiston, ME 042401144511528
- Erik O'Connell, D.O.Augusta, ME 043301891085122
- Margaret Duston, M.D.Manchester, ME 043511396750485
- Sidney Block, MDBangor, ME 044011841290376
Common questions
What is Joshua Andrew Keller, M.D.'s NPI number?
Joshua Andrew Keller, M.D.'s National Provider Identifier (NPI) is 1578975439, issued on May 27, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Joshua Andrew Keller, M.D. located?
The NPPES record lists a practice address at 51 Sewall St, Portland, ME, 04102. Phone: (207) 774-5761. Providers update this record themselves, so call before visiting.
How can I verify Joshua Andrew Keller, M.D.'s license?
NPPES lists Maine license number MD21587, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joshua Andrew Keller, M.D. prescribe under Medicare Part D?
In 2024, Joshua Andrew Keller, M.D. had 2,017 Medicare Part D claims for 437 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Joshua Andrew Keller, M.D.'s MIPS final score?
The 2023 MIPS final score is 98.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.