Jay Mainthia
Family Medicine Physician · Roslindale, MA
Jay Mainthia is a family medicine physician with a practice address in Roslindale, Massachusetts, and NPI 1306420781, issued on May 11, 2021. Check the license (Massachusetts 1015761, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Jay Mainthia
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 1015761 MA
Self-reported in NPPES; status is on the state search - Practice location
- 4199 Washington Street, Roslindale, MA 02131
- Phone
- (617) 323-4440
- Enumerated
- May 11, 2021
- Record last updated
- May 11, 2026
- Medicaid ID
- 110201935A MA
- Medicare enrollment
- Enrolled (PECOS I20260527000921); may accept Medicare assignment
- Medical or professional school
- Morehouse School Of Medicine, 2023
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,265 in Massachusetts → Look up another NPI →
Also registered at 4199 Washington Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachel Gerald, MDFamily Medicine Physician1710680657
- Julia Kirchner, MDFamily Medicine Physician1962907568
- Camille Singh, MDFamily Medicine Physician1053948927
Verify Jay Mainthia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1015761Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average family medicine physician in 2024
159 Medicare Part D claims for 41 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium16 claims
- Amlodipine Besylate13 claims
- Lisinopril13 claims
- Hydrochlorothiazide12 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.
Jay Mainthia among 2,265 family medicine physician records in Massachusetts
Jay Mainthia is one of 2,265 family medicine physician records with a practice address in Massachusetts. 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 2021, is newer than 90% of them.
- NPI issued2021 · 90% of these records are older, 8% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2023 · median 2006 among the 1,529 with a school on file
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 family medicine physician records list a practice address in Roslindale
They are 15 of the 677 NPPES records with a practice address in Roslindale, and 2,265 family medicine physician records in Massachusetts.
All 2,265 in Massachusetts → Every provider in Roslindale → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lily Black, MDRoslindale, MA 021311609495514
- Juliana Castedo, MDBoston, MA 021311992191167
- Ilia Coka, MDRoslindale, MA 021311083693386
- Colleen Farrell, M.D.Roslindale, MA 021311497038129
- Julian Gonzalez, MDRoslindale, MA 021311861996134
- Julia Kirchner, MDRoslindale, MA 021311962907568
- Kirstin Lee, MDRoslindale, MA 021311740868165
- Carol Oneil, MDRoslindale, MA 021311316935729
Common questions
What is Jay Mainthia's NPI number?
Jay Mainthia's National Provider Identifier (NPI) is 1306420781, issued on May 11, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Jay Mainthia located?
The NPPES record lists a practice address at 4199 Washington Street, Roslindale, MA, 02131. Phone: (617) 323-4440. Providers update this record themselves, so call before visiting.
How can I verify Jay Mainthia's license?
NPPES lists Massachusetts license number 1015761, 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 Jay Mainthia prescribe under Medicare Part D?
In 2024, Jay Mainthia had 159 Medicare Part D claims for 41 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.