Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Allan S Kratzer, M.D.

Radiation Oncology Physician in Meriden, CT · enumerated 2006.

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

National Provider Identifier

1639257058

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Registry record

Entity type Individual (Type 1)

Name Dr. Allan S Kratzer

Credential M.D.

Sex Male

Practice address 435 Lewis Ave, Meriden, CT, 06451

Phone (203) 694-8433

Fax (203) 694-7630

Enumeration date Nov 2, 2006

Last updated in NPPES Sep 28, 2007

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 029775 (CT) 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
4124913	Other	-	AETNA
763823	Other	-	CONNECTICARE
OV5222	Other	-	HEALTH NET
500HBX153CT01	Other	-	BCBS OF CT
P00061763	Other	-	MVP SELECT

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

How do I verify Allan Kratzer's NPI record?

Cross-check NPI 1639257058 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639257058 active?

Yes, as of the latest NPPES snapshot, NPI 1639257058 is active (record last updated 2007-09-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-28.