Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William A Rieck Jr., DO

Sports Medicine (Physical Medicine & Rehabilitation) Physician in Sacramento, CA · enumerated 2017.

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

National Provider Identifier

1669992418

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Registry record

Entity type Individual (Type 1)

Name William A Rieck Jr.

Credential DO

Sex Male

Practice address 3301 C St Ste 1600, Sacramento, CA, 95816

Phone (916) 734-6805

Enumeration date Jun 22, 2017

Last updated in NPPES Jun 27, 2026

Taxonomy & licenses

2081S0010X Sports Medicine (Physical Medicine & Rehabilitation) Physician Allopathic & Osteopathic Physicians · License 20A25378 (CA) Primary

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License 2022-01128 (NC) Secondary

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License 20A25378 (CA) Secondary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 William Rieck's NPI record?

Cross-check NPI 1669992418 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1669992418 active?

Yes, as of the latest NPPES snapshot, NPI 1669992418 is active (record last updated 2026-06-27).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-27.