Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert Thomas Stoffer, MD

Internal Medicine Physician in Phoenix, AZ · enumerated 2006.

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

National Provider Identifier

1538123427

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Registry record

Entity type Individual (Type 1)

Name Robert Thomas Stoffer

Credential MD

Sex Male

Practice address 3201 W Peoria Ave, Suite 604, Phoenix, AZ, 85029

Phone (602) 993-1773

Fax (602) 993-1323

Enumeration date Apr 17, 2006

Last updated in NPPES Oct 20, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 10355 (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
BLUE CROSS BLUE SHIE	Other	AZ	AZ0015390

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 1538123427 active?

Yes, as of the latest NPPES snapshot, NPI 1538123427 is active (record last updated 2023-10-20).

How do I verify Robert Stoffer's NPI record?

Cross-check NPI 1538123427 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-20.