Gregory James Challener, MD
Rheumatology Physician · Boston, MA
Gregory James Challener, MD is a rheumatology physician with a practice address in Boston, Massachusetts, and NPI 1659831865, issued on Mar 22, 2019. Check the license (Massachusetts 292803, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Gregory James Challener
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 292803 MA
Self-reported in NPPES; status is on the state search - Practice location
- 55 Fruit St, Boston, MA 02114
- Phone
- (412) 400-3003
- Enumerated
- Mar 22, 2019
- Record last updated
- Oct 18, 2022
- Medicare enrollment
- Enrolled (PECOS I20240423003045); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 343 in Massachusetts → Look up another NPI →
Also registered at 55 Fruit St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Taimur AbbasiInternal Medicine Physician1841673522
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- Moustafa AbdallaStudent in an Organized Health Care Education/Training Program1952046062
- Shadi Abdar Esfahani, MD, MPHDiagnostic Radiology Physician1497137590
Verify Gregory James Challener in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 292803Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average rheumatology physician in 2024
424 Medicare Part D claims for 70 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Prednisone95 claims
- Methotrexate50 claims
- Actemra Actpen32 claims
- Gabapentin21 claims
- Allopurinol17 claims
- Humira(Cf) Pen17 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.
Industry payments in 2024: $99.00
1 payment: education; the largest payer was Janssen Biotech, Inc. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Massachusetts General Physicians Organization IncOak Bluffs, MA
- The General Hospital CorporationBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory James Challener among 343 rheumatology physician records in Massachusetts
Gregory James Challener, MD is one of 343 rheumatology physician records with a practice address in Massachusetts. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 93% of them.
- NPI issued2019 · 93% of these records are older, 3% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2019 · median 2004 among the 212 with a school on file
- Record last updated2022 · 62% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Massachusetts
There are 343 rheumatology physician records in Massachusetts.
All 343 in Massachusetts → Every provider in Boston → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Syed Ahmed, M.D.Boston, MA 021141407829948
- Sheila Arvikar, M.D.Boston, MA 021141881721249
- Donald Bloch, MDBoston, MA 021141609857739
- Kurt Bloch, MDBoston, MA 021141326020652
- Marcy Bolster, MDBoston, MA 021141154439198
- Flavia Castelino, M.D.Boston, MA 021141962611301
- Robert Friday, MD PHDBoston, MA 021141053393074
- Nancy Kim, M.D.Boston, MA 021141669447090
Common questions
What is Gregory James Challener, MD's NPI number?
Gregory James Challener, MD's National Provider Identifier (NPI) is 1659831865, issued on Mar 22, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Gregory James Challener, MD located?
The NPPES record lists a practice address at 55 Fruit St, Boston, MA, 02114. Phone: (412) 400-3003. Providers update this record themselves, so call before visiting.
How can I verify Gregory James Challener, MD's license?
NPPES lists Massachusetts license number 292803, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory James Challener, MD prescribe under Medicare Part D?
In 2024, Gregory James Challener, MD had 424 Medicare Part D claims for 70 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.