Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Steven Michael Young, M.D.

Surgery Physician in Walnut Creek, CA · enumerated 2006.

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

National Provider Identifier

1659455103

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Registry record

Entity type Individual (Type 1)

Name Dr. Steven Michael Young

Credential M.D.

Sex Male

Practice address 130 La Casa Via, Building 3, Suite 211, Walnut Creek, CA, 94598

Phone (925) 933-0984

Fax (925) 933-0986

Enumeration date Oct 24, 2006

Last updated in NPPES Jul 23, 2021

Taxonomy & licenses

174400000X Specialist Other Service Providers · License A91467 (CA) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License A91467 (CA) 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 1659455103 active?

Yes, as of the latest NPPES snapshot, NPI 1659455103 is active (record last updated 2021-07-23).

How do I verify Steven Young's NPI record?

Cross-check NPI 1659455103 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 2021-07-23.