Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew Gretzer, MD

Urology Physician in Tucson, AZ · enumerated 2006.

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

National Provider Identifier

1033184700

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Registry record

Entity type Individual (Type 1)

Name Matthew Gretzer

Credential MD

Sex Male

Practice address 1501 N Campbell Ave, Tucson, AZ, 85724

Phone (520) 874-3500

Enumeration date Feb 17, 2006

Last updated in NPPES May 29, 2008

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 33803 (AZ) 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
P00236512	Other	AZ	RR MEDICARE

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 Matthew Gretzer's NPI record?

Cross-check NPI 1033184700 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1033184700 active?

Yes, as of the latest NPPES snapshot, NPI 1033184700 is active (record last updated 2008-05-29).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-29.