Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Martha Anne Stewart, PA

Physician Assistant in Santa Cruz, CA · enumerated 2006.

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

National Provider Identifier

1285707653

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Registry record

Entity type Individual (Type 1)

Name Mrs. Martha Anne Stewart

Credential PA

Sex Female

Practice address 1665 Dominican Way, Suite 222, Santa Cruz, CA, 95065

Phone (844) 387-5337

Fax (866) 264-3890

Enumeration date Nov 15, 2006

Last updated in NPPES Feb 21, 2017

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 52362 (CA) Primary

PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program. About the PA credential

Other identifiers

Identifier	Type	State	Issuer
CA147934	Other	CA	MEDICARE PTAN

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 Martha Stewart?

Martha Stewart is registered in NPPES with the primary taxonomy of Physician Assistant. 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 2017-02-21.