Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stanley W Leff, MD

Q: What is the NPI number for Stanley Leff?

The National Provider Identifier (NPI) for Stanley Leff is 1699861492, a Type 1 (individual) record in the CMS NPPES registry.

Family Medicine Physician in Roseville, CA · enumerated 2006 · practices at Sutter Valley Medical Foundation.

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

National Provider Identifier

1699861492

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Registry record

Entity type Individual (Type 1)

Name Stanley W Leff

Credential MD

Sex Male

Practice address 568 N Sunrise Ave, Suite 250, Roseville, CA, 95661

Phone (916) 865-1140

Fax (916) 865-1145

Enumeration date Oct 5, 2006

Last updated in NPPES Jun 2, 2015

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License C37088 (CA) 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
00C370880	Medicaid	CA	-

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

What is the NPI number for Stanley Leff?

The National Provider Identifier (NPI) for Stanley Leff is 1699861492, a Type 1 (individual) record in the CMS NPPES registry.

Where does Stanley Leff practice?

The practice location on file with NPPES is in Roseville, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-06-02.