NPI Portal NPI Lookup & Verification

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

Dr. Gregory B Auffenberg, M.D., M.S.

Urology Physician in Saint Louis, MO · enumerated 2009.

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

National Provider Identifier

1396977328

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Registry record

Entity type Individual (Type 1)
Name Dr. Gregory B Auffenberg
Credential M.D., M.S.
Sex Male
Practice address Saint Louis, MO, 63141
Phone (314) 567-6071
Fax (314) 453-9965
Enumeration date Aug 8, 2009
Last updated in NPPES Sep 12, 2023

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

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 036132771 (IL) Secondary
208800000X Urology Physician Allopathic & Osteopathic Physicians · License 2021039448 (MO) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Gregory Auffenberg's NPI record?
Cross-check NPI 1396977328 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1396977328 active?
Yes, as of the latest NPPES snapshot, NPI 1396977328 is active (record last updated 2023-09-12).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-12.