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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas J Perille, M.D.

Internal Medicine Physician in Denver, CO · enumerated 2007.

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

National Provider Identifier

1821131301

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Registry record

Entity type Individual (Type 1)
Name Dr. Thomas J Perille
Credential M.D.
Sex Male
Practice address 1835 Franklin St, Denver, CO, 80218
Phone (303) 338-4545
Enumeration date Feb 15, 2007
Last updated in NPPES Sep 28, 2012

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 25264 (CO) 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
003111 Other - KAISER-COMMERCIAL NUMBER
01252642 Medicaid CO -

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 1821131301 active?
Yes, as of the latest NPPES snapshot, NPI 1821131301 is active (record last updated 2012-09-28).
How do I verify Thomas Perille's NPI record?
Cross-check NPI 1821131301 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 2012-09-28.