Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Anthony Laurence Zietman, MD

Radiation Oncology Physician in Boston, MA · enumerated 2005.

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

National Provider Identifier

1811972904

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Registry record

Entity type Individual (Type 1)

Name Dr. Anthony Laurence Zietman

Credential MD

Sex Male

Practice address 100 Blossom St Cox 3, Radiation Oncology, Boston, MA, 02114

Phone (617) 726-8150

Fax (617) 726-3603

Enumeration date Dec 12, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 76822 (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
J13183	Other	MA	BCBS OF MA
3101410	Medicaid	MA	-
076822	Other	MA	TUFTS HEALTH PLAN

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

How do I verify Anthony Zietman's NPI record?

Cross-check NPI 1811972904 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1811972904 active?

Yes, as of the latest NPPES snapshot, NPI 1811972904 is active (record last updated 2007-07-08).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.