NPI Portal NPI Lookup & Verification

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

Dr. Gregorius Resuma Penilla, M.D.

Internal Medicine Physician in Fenton, MO · enumerated 2006.

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

National Provider Identifier

1023024973

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Registry record

Entity type Individual (Type 1)
Name Dr. Gregorius Resuma Penilla
Credential M.D.
Sex Male
Practice address Fenton, MO, 63026
Phone (636) 496-5040
Enumeration date Jul 31, 2006
Last updated in NPPES Oct 26, 2020

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 36678 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1023024973 active?
Yes, as of the latest NPPES snapshot, NPI 1023024973 is active (record last updated 2020-10-26).
How do I verify Gregorius Penilla's NPI record?
Cross-check NPI 1023024973 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 2020-10-26.