John Foster, MD
Internal Medicine Physician · Boston, MA
John Foster, MD is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1194716753, issued on Nov 2, 2005. Check the license (Massachusetts 58548, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Foster
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 58548 MA
Self-reported in NPPES; status is on the state search - Practice location
- 332 Hanover St, Boston, MA 02113
- Phone
- (617) 643-8000
- Enumerated
- Nov 2, 2005
- Record last updated
- Aug 1, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (617) 643-8122
- Medicaid ID
- 2001551 MA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 332 Hanover St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Foster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 58548Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
589 Medicare Part D claims for 112 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium53 claims
- Omeprazole39 claims
- Amlodipine Besylate37 claims
- Rosuvastatin Calcium30 claims
- Lisinopril26 claims
- Metoprolol Succinate23 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.
John Foster among 6,825 internal medicine physician records in Massachusetts
John Foster, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2012 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,320 internal medicine physician records list a practice address in Boston
They are 2,320 of the 41,865 NPPES records with a practice address in Boston, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Boston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Catherine Buettner, MDBoston, MA 021131487692604
- Ottavio Nardone, M.D.Boston, MA 021131952389892
- Rebecca Patel, MD, MPHBoston, MA 021131336313899
- Diane Rich, MDBoston, MA 021131013991942
- Catherine Yu, M.D.Boston, MA 021131548228455
- Jaime Chang, MDBoston, MA 021141205825197
- James Evans, MDBoston, MA 021141215939533
- Nicolette Fontaine, MDBoston, MA 021141841287174
Common questions
What is John Foster, MD's NPI number?
John Foster, MD's National Provider Identifier (NPI) is 1194716753, issued on Nov 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Foster, MD located?
The NPPES record lists a practice address at 332 Hanover St, Boston, MA, 02113. Phone: (617) 643-8000. Providers update this record themselves, so call before visiting.
How can I verify John Foster, MD's license?
NPPES lists Massachusetts license number 58548, 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 John Foster, MD prescribe under Medicare Part D?
In 2024, John Foster, MD had 589 Medicare Part D claims for 112 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.