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

Mr. William Allen Danz, B.C.O.

Prosthetic/Orthotic Supplier in San Francisco, CA · enumerated 2007.

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

National Provider Identifier

1659424604

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Registry record

Entity type Individual (Type 1)

Name Mr. William Allen Danz

Credential B.C.O.

Sex Male

Practice address San Francisco, CA, 94102

Phone (415) 433-3990

Fax (415) 986-0491

Enumeration date Jan 20, 2007

Last updated in NPPES Jun 6, 2008

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

Taxonomy & licenses

335E00000X Prosthetic/Orthotic Supplier Suppliers Primary

Other identifiers

Identifier	Type	State	Issuer
ZZZ75342Z	Medicaid	CA	-
CGP003405	Other	CA	CCS GHPP PROVIDER NUMBER

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 William Danz's NPI record?

Cross-check NPI 1659424604 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1659424604 active?

Yes, as of the latest NPPES snapshot, NPI 1659424604 is active (record last updated 2008-06-06).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-06.