Jason Shaffer, MD
Family Medicine Physician · Somerville, MA
Jason Shaffer, MD is a family medicine physician with a practice address in Somerville, Massachusetts, and NPI 1043898273, issued on Mar 30, 2021. Check the license (Massachusetts 1018961, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Jason Shaffer
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 1018961 MA
1043898273 RI
LP05391 RI
Self-reported in NPPES; status is on the state search - Practice location
- 300 Broadway, Somerville, MA 02145
- Phone
- (401) 737-7010
- Enumerated
- Mar 30, 2021
- Record last updated
- Nov 4, 2024
- Medicare enrollment
- Enrolled (PECOS I20250204002383); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2021
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,265 in Massachusetts → Look up another NPI →
Also registered at 300 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Barbara Bowe, RNRegistered Nurse1629376959
- Laura BrightmanInternal Medicine Physician1801970546
- Casey Callahan, MDFamily Medicine Physician1225657919
Verify Jason Shaffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1018961Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average family medicine physician in 2024
1,110 Medicare Part D claims for 121 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Atorvastatin Calcium74 claims
- Amlodipine Besylate70 claims
- Gabapentin58 claims
- Metformin Hcl41 claims
- Lisinopril40 claims
- Albuterol Sulfate Hfa30 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
- Cambridge Public Health CommissionSomerville, MA
- Mass General Brigham Medical Group Northern Massachusetts IncDanvers, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jason Shaffer among 2,265 family medicine physician records in Massachusetts
Jason Shaffer, MD 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
- Graduated2021 · median 2006 among the 1,529 with a school on file
- Record last updated2024 · 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).
30 family medicine physician records list a practice address in Somerville
They are 30 of the 1,860 NPPES records with a practice address in Somerville, and 2,265 family medicine physician records in Massachusetts.
All 2,265 in Massachusetts → Every provider in Somerville → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Zev Allen, MD, MPH, MBASomerville, MA 021451861132953
- Christine Amitay, M.D.Somerville, MA 021451083681522
- Uilst Bat-Erdene, MDSomerville, MA 021451235985342
- Casey Callahan, MDSomerville, MA 021451225657919
- Andrew Chandler, MDSomerville, MA 021451548607112
- Lucia Dias-Hoff, MDSomerville, MA 021451104893155
- Amanda Klein, M.D.Somerville, MA 021451003854399
- Yulya Kutsman, D.O.Somerville, MA 021451588611735
Common questions
What is Jason Shaffer, MD's NPI number?
Jason Shaffer, MD's National Provider Identifier (NPI) is 1043898273, issued on Mar 30, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Jason Shaffer, MD located?
The NPPES record lists a practice address at 300 Broadway, Somerville, MA, 02145. Phone: (401) 737-7010. Providers update this record themselves, so call before visiting.
How can I verify Jason Shaffer, MD's license?
NPPES lists Massachusetts license number 1018961, 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 Jason Shaffer, MD prescribe under Medicare Part D?
In 2024, Jason Shaffer, MD had 1,110 Medicare Part D claims for 121 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.