John Ahern
Family Medicine Physician · Cambridge, MA
John Ahern is a family medicine physician with a practice address in Cambridge, Massachusetts, and NPI 1699397141, issued on May 7, 2020. Check the license (Massachusetts 1014642, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Ahern
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 1014642 MA
Self-reported in NPPES; status is on the state search - Practice location
- 163 Gore St, Cambridge, MA 02141
- Phone
- (617) 665-3000
- Enumerated
- May 7, 2020
- Record last updated
- May 24, 2023
- Medicare enrollment
- Enrolled (PECOS I20230608001131); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,265 in Massachusetts → Look up another NPI →
Also registered at 163 Gore St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kidmalem Adamu, RNAmbulatory Care Registered Nurse1114736261
- Amy Allen, OTD, OTR/LOccupational Therapist1124675376
- Elizabeth Attreed, RNRegistered Nurse1194003905
- Chris Babbage, M.D.Psychiatry Physician1134350481
- Curtis Ballard, RNRegistered Nurse1629512769
- Lourdes BarrosSocial Worker1578636874
Verify John Ahern in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1014642Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average family medicine physician in 2024
295 Medicare Part D claims for 37 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Lisinopril26 claims
- Atorvastatin Calcium23 claims
- Trazodone Hcl21 claims
- Omeprazole14 claims
- Simvastatin13 claims
- Naproxen12 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 one group practice
- Cambridge Public Health CommissionCambridge, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Ahern among 2,265 family medicine physician records in Massachusetts
John Ahern 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 2020, is newer than 87% of them.
- NPI issued2020 · 87% of these records are older, 10% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2015 · median 2006 among the 1,529 with a school on file
- Record last updated2023 · 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).
44 family medicine physician records list a practice address in Cambridge
They are 44 of the 5,145 NPPES records with a practice address in Cambridge, and 2,265 family medicine physician records in Massachusetts.
All 2,265 in Massachusetts → Every provider in Cambridge → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kenneth Gerweck, M.D.East Cambridge, MA 021411497733752
- Scott Latimer, M.D.Cambridge, MA 021411376978924
- Florentine Pepin, MDCambridge, MA 021411922445444
- Peter Yeracaris, M.D.East Cambridge, MA 021411801976543
- Austin Egan, MDCambridge, MA 021421689651267
- Radelys German, MDCambridge, MA 021401487394433
- Sherry Graham, M.D.Cambridge, MA 021401104811611
- Stella Kinyota, MD, MPHCambridge, MA 021421790913853
Common questions
What is John Ahern's NPI number?
John Ahern's National Provider Identifier (NPI) is 1699397141, issued on May 7, 2020. An NPI identifies a provider in billing; it is not a license.
Where is John Ahern located?
The NPPES record lists a practice address at 163 Gore St, Cambridge, MA, 02141. Phone: (617) 665-3000. Providers update this record themselves, so call before visiting.
How can I verify John Ahern's license?
NPPES lists Massachusetts license number 1014642, 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 Ahern prescribe under Medicare Part D?
In 2024, John Ahern had 295 Medicare Part D claims for 37 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.