Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sam S. Yang, MD

Ophthalmology Physician in Walnut Creek, CA · enumerated 2007 · practices at Kaiser Medical Offices.

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

National Provider Identifier

1811049034

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Registry record

Entity type Individual (Type 1)

Name Sam S. Yang

Credential MD

Sex Male

Practice address 320 Lennon Ln, Walnut Creek, CA, 94598

Phone (925) 906-2000

Enumeration date Jan 17, 2007

Last updated in NPPES Dec 13, 2021

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License A75699 (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
00A756990	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

How do I verify Sam Yang's NPI record?

Cross-check NPI 1811049034 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1811049034 active?

Yes, as of the latest NPPES snapshot, NPI 1811049034 is active (record last updated 2021-12-13).

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Ethan Kutzscher Ophthalmology Physician · Walnut Creek, CA NPI 1700881661 Allison Hanson Nurse Practitioner · Walnut Creek, CA NPI 1376537589 Filomena Khodayari Family Nurse Practitioner · Walnut Creek, CA NPI 1871588913 Clemens Grosskinsky Reproductive Endocrinology Physician · Walnut Creek, CA NPI 1235128315 Errol Craig Dermatology Physician · Walnut Creek, CA NPI 1659344281 Pavani Kuruma Family Medicine Physician · Walnut Creek, CA NPI 1285601310 Tammy Hong Optometrist · Walnut Creek, CA NPI 1790753960 Robert Ozaki Sports Medicine (Family Medicine) Physician · Walnut Creek, CA NPI 1851358915

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-13.