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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jack Leitner, MD

Medical Oncology Physician in Framingham, MA · enumerated 2007.

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

National Provider Identifier

1205975067

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Registry record

Entity type Individual (Type 1)
Name Dr. Jack Leitner
Credential MD
Sex Male
Practice address 95 Lincoln St, Framingham, MA, 01702
Phone (508) 875-1964
Fax (508) 626-7690
Enumeration date Feb 6, 2007
Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 31597 (MA) Secondary
207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 31597 (MA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
2017725 Medicaid MA -

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.

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Frequently asked questions

Is NPI 1205975067 active?
Yes, as of the latest NPPES snapshot, NPI 1205975067 is active (record last updated 2025-09-11).
How do I verify Jack Leitner's NPI record?
Cross-check NPI 1205975067 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.