Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Franklin Lewis

Peer Specialist in Littleton, CO · enumerated 2015.

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

National Provider Identifier

1679944755

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Registry record

Entity type Individual (Type 1)

Name Mr. William Franklin Lewis

Sex Male

Practice address 2200 W Berry Ave, Littleton, CO, 80120

Phone (303) 597-3997

Enumeration date Oct 14, 2015

Last updated in NPPES Oct 14, 2015

Taxonomy & licenses

175T00000X Peer Specialist Other Service Providers Primary

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is William Lewis?

William Lewis is registered in NPPES with the primary taxonomy of Peer Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-10-14.