Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Giampiero A. Martignetti, M.D., PH.D.

Ph.D. Medical Genetics in New York, NY · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1265495907

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Registry record

Entity type Individual (Type 1)

Name Dr. Giampiero A. Martignetti

Credential M.D., PH.D.

Sex Male

Practice address Mt Sinai School of Medicine, 1425 Madison Avenue - Box 1498, New York, NY, 10029

Phone (212) 659-6744

Fax (212) 849-2638

Enumeration date Apr 11, 2006

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

170100000X Ph.D. Medical Genetics Other Service Providers · License 198481-1 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1265495907 active?

Yes, as of the latest NPPES snapshot, NPI 1265495907 is active (record last updated 2023-03-07).

How do I verify Giampiero Martignetti's NPI record?

Cross-check NPI 1265495907 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.