DR. MARKELLA V ZANNI M.D.
NPI 1790835056
Internal Medicine - Endocrinology, Diabetes & Metabolism in Boston, MA
About Dr. Markella V Zanni M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARKELLA V ZANNI M.D. (NPI 1790835056) is an individual endocrinology, diabetes & metabolism provider in Boston, Massachusetts, licensed in Massachusetts (231432) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Harvard Medical School (2004).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Markella V Zanni M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Markella Zanni reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02114
BOSTON, MA 02114
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Markella Zanni's NPI number?
The NPI number for Markella Zanni is 1790835056. It was assigned to this individual provider in the NPPES registry on January 11, 2007.
Where is Markella Zanni located?
Markella Zanni practices at 0 Emerson Pl Suite 112, Boston, MA 02114. The listed phone number is (617) 726-6813.
What is Markella Zanni's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Markella Zanni enrolled in Medicare?
Yes. Markella Zanni is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Markella Zanni's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Markella Zanni reassigns Medicare benefits to 2 organizations: Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Markella Zanni's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Markella Zanni affiliated with any hospitals?
According to CMS data, Markella Zanni is affiliated with Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for Markella Zanni was last updated on May 3, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Markella V Zanni, M.D. · NPI 1790835056
Endocrinology, Diabetes & Metabolism physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since January 11, 2007.
## Identity
- **NPI:** 1790835056 (Entity type: Individual)
- **Enumerated:** January 11, 2007
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** 231432 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 0 EMERSON PL, SUITE 112, Boston, MA 02114-2241
- **Phone:** (617) 726-6813 · **Fax:** (617) 726-1241
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2004
## Record status
- **NPPES last updated:** May 3, 2011
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Source: [NPI Profile](https://npiprofile.com/npi/1790835056) · Data from the CMS NPPES public registry.