Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. George J Papanicolaou, D.O.

Family Medicine Physician in Rowley, MA · enumerated 2005.

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

National Provider Identifier

1265437511

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Registry record

Entity type Individual (Type 1)

Name Mr. George J Papanicolaou

Credential D.O.

Sex Male

Practice address 303 Haverhill St # C, Rowley, MA, 01969

Phone (978) 948-3902

Fax (978) 948-7530

Enumeration date Jun 14, 2005

Last updated in NPPES Apr 23, 2013

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 155418 (MA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
3173763	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1265437511 active?

Yes, as of the latest NPPES snapshot, NPI 1265437511 is active (record last updated 2013-04-23).

How do I verify George Papanicolaou's NPI record?

Cross-check NPI 1265437511 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 2013-04-23.