Markella V. Zanni, M.D.
Endocrinology, Diabetes & Metabolism Physician · Boston, MA
Markella V. Zanni, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Boston, Massachusetts, and NPI 1790835056, issued on Jan 11, 2007. Check the license (Massachusetts 231432, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Markella V. Zanni
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 231432 MA
Self-reported in NPPES; status is on the state search - Practice location
- 0 Emerson PL, Boston, MA 02114
- Phone
- (617) 726-6813
- Enumerated
- Jan 11, 2007
- Record last updated
- May 3, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (617) 726-1241
- Medicare enrollment
- Enrolled (PECOS I20090521000104); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 522 in Massachusetts → Look up another NPI →
Also registered at 0 Emerson PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ralph Metson, MDOtolaryngology Physician1104807551
- Emily Miller, MDEmergency Medicine Physician1568452282
- David Shaywitz, MD PHDEndocrinology, Diabetes & Metabolism Physician1093705436
Verify Markella V. Zanni in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 231432Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
14 Medicare Part D claims, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D.
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
- The General Hospital CorporationBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Markella V. Zanni among 522 endocrinology, diabetes & metabolism physician records in Massachusetts
Markella V. Zanni, M.D. is one of 522 endocrinology, diabetes & metabolism physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 40% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2004 · median 2002 among the 378 with a school on file
- Record last updated2011 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Massachusetts
There are 522 endocrinology, diabetes & metabolism physician records in Massachusetts.
All 522 in Massachusetts → Every provider in Boston → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Joseph Avruch, MDBoston, MA 021141851381941
- Giuseppe Barbesino, MDBoston, MA 021141366432635
- Enrico Cagliero, MDBoston, MA 021141700877347
- William Crowley, MDBoston, MA 021141417947599
- Marie Demay, MDBoston, MA 021141528058153
- Steven Grinspoon, MDBoston, MA 021141457342099
- Janet Hall, MDBoston, MA 021141548251002
- Anne Klibanski, MDBoston, MA 021141518958164
Common questions
What is Markella V. Zanni, M.D.'s NPI number?
Markella V. Zanni, M.D.'s National Provider Identifier (NPI) is 1790835056, issued on Jan 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Markella V. Zanni, M.D. located?
The NPPES record lists a practice address at 0 Emerson PL, Boston, MA, 02114. Phone: (617) 726-6813. Providers update this record themselves, so call before visiting.
How can I verify Markella V. Zanni, M.D.'s license?
NPPES lists Massachusetts license number 231432, 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 Markella V. Zanni, M.D. prescribe under Medicare Part D?
In 2024, Markella V. Zanni, M.D. had 14 Medicare Part D claims; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.