Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Marti L. Willey, N.P.

Nurse Practitioner in Encinitas, CA · enumerated 2012.

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

National Provider Identifier

1144574062

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Registry record

Entity type Individual (Type 1)

Name Marti L. Willey

Credential N.P.

Sex Female

Practice address Encinitas, CA, 92024

Phone (760) 452-3340

Fax (760) 452-3344

Enumeration date Oct 30, 2012

Last updated in NPPES Dec 22, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 22548 (CA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
GT229Z	Other	CA	MEDICARE PTAN
2012003305	Other	CA	ANCC NATIONAL CERTIFICATION
22548	Other	CA	NURSE PRACTITIONER MEDICAL LICENSE
588647	Other	CA	RN MEDICAL LICENSE

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 specialty is Marti Willey?

Marti Willey is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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Alberto Bessudo Hematology & Oncology Physician · Encinitas, CA NPI 1003888074 Laurie Frakes Hematology & Oncology Physician · Encinitas, CA NPI 1174595144 John Schwerkoske Hematology & Oncology Physician · Encinitas, CA NPI 1912260829 Barbara Mae Madriaga Family Nurse Practitioner · Encinitas, CA NPI 1912659442

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-22.