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Sara Mathew Holmes, MD

Nephrology Physician in Novato, CA · enumerated 2011 · practices at Kaiser.

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

National Provider Identifier

1801174479

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Registry record

Entity type Individual (Type 1)
Name Sara Mathew Holmes
Credential MD
Sex Female
Practice address 97 San Marin Dr, Novato, CA, 94945
Phone (415) 899-7880
Fax (415) 899-7815
Enumeration date Jul 29, 2011
Last updated in NPPES Nov 5, 2025

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License MD443610 (PA) Secondary
207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License MD600004898 (DC) Primary
207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License A133361 (CA) Secondary
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.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Sara Holmes?
Sara Holmes is registered in NPPES with the primary taxonomy of Nephrology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-05.