Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Warren C Rizzo, MD

Q: What is the NPI number for Warren Rizzo?

The National Provider Identifier (NPI) for Warren Rizzo is 1053371153, a Type 1 (individual) record in the CMS NPPES registry.

Rheumatology Physician in Scottsdale, AZ · enumerated 2006.

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

National Provider Identifier

1053371153

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Registry record

Entity type Individual (Type 1)

Name Dr. Warren C Rizzo

Credential MD

Sex Male

Practice address Scottsdale, AZ, 85258

Phone (480) 451-3222

Fax (480) 451-3224

Enumeration date Mar 24, 2006

Last updated in NPPES Apr 18, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License 28981 (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
3200086	Other	AZ	UNITED HEALTH CARE
320045672	Other	AZ	ALL OTHER INS PROVIDERS
AZ0726620	Other	AZ	BCBS
WORKERS COMPENSATION	Other	AZ	28981
110247592	Other	AZ	PALMETTO RAILROAD MEDICAR
563826	Other	AZ	AHCCCS
1Z6190	Other	AZ	HEALTHNET
5403601	Other	AZ	CCN
563826	Medicaid	AZ	-
7686072	Other	AZ	AETNA

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

Where does Warren Rizzo practice?

The practice location on file with NPPES is in Scottsdale, AZ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Warren Rizzo?

The National Provider Identifier (NPI) for Warren Rizzo is 1053371153, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-18.