John Alexander Zambrano, M.D., M.H.S
Internal Medicine Physician · Boston, MA
John Alexander Zambrano, M.D., M.H.S is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1730422593, issued on Mar 30, 2013. Check the license (Massachusetts 266903, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Alexander Zambrano
- Credential
- M.D., M.H.S
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 266903 MA
Self-reported in NPPES; status is on the state search - Practice location
- 147 Milk St, Boston, MA 02109
- Phone
- (617) 654-7200
- Enumerated
- Mar 30, 2013
- Record last updated
- Nov 17, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (617) 654-7165
- Medicare enrollment
- Enrolled (PECOS I20161021001407); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 147 Milk St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Adams, M.D.Dermatology Physician1871777615
- Martha Bagby, LICSWClinical Social Worker1942251186
- Olivia Bane, FNPNurse Practitioner1053144956
- Linda Barnard, MS, APRN-BCNurse Practitioner1710994553
- John Beneski, D.C.Chiropractor1003973058
- Karen Bikofsky, NPAdult Health Nurse Practitioner1720337207
Verify John Alexander Zambrano in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 266903Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,467 Medicare Part D claims for 260 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 52 claims were for opioids.
Most prescribed
- Atorvastatin Calcium111 claims
- Amlodipine Besylate95 claims
- Rosuvastatin Calcium62 claims
- Lisinopril48 claims
- Metformin Hcl Er48 claims
- Simvastatin43 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
- Atrius Health IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Alexander Zambrano among 6,825 internal medicine physician records in Massachusetts
John Alexander Zambrano, M.D., M.H.S 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 2013, is newer than 70% of them.
- NPI issued2013 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2013 · median 2004 among the 4,103 with a school on file
- Record last updated2020 · 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
- Talia Herman, M.D.Boston, MA 021091881662369
- Helen Hunt, M.D.Boston, MA 021091194793695
- Erin Jospe, M.D.Boston, MA 021091033224092
- Julie Kaufman, M.D.Boston, MA 021091487622536
- Kathleen Kennedy McCarey, NPBoston, MA 021091326051582
- David Krieger, M.D.Boston, MA 021091346219326
- Jeffrey Levin-Scherz, MD MBABoston, MA 021091699702555
- Kenneth Luna, D.O.Boston, MA 021091033183298
Common questions
What is John Alexander Zambrano, M.D., M.H.S's NPI number?
John Alexander Zambrano, M.D., M.H.S's National Provider Identifier (NPI) is 1730422593, issued on Mar 30, 2013. An NPI identifies a provider in billing; it is not a license.
Where is John Alexander Zambrano, M.D., M.H.S located?
The NPPES record lists a practice address at 147 Milk St, Boston, MA, 02109. Phone: (617) 654-7200. Providers update this record themselves, so call before visiting.
How can I verify John Alexander Zambrano, M.D., M.H.S's license?
NPPES lists Massachusetts license number 266903, 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 Alexander Zambrano, M.D., M.H.S prescribe under Medicare Part D?
In 2024, John Alexander Zambrano, M.D., M.H.S had 1,467 Medicare Part D claims for 260 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.