MARTI L. WILLEY N.P.
NPI 1144574062
Nurse Practitioner in Encinitas, CA
About Marti L. Willey N.p. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARTI L. WILLEY N.P. (NPI 1144574062) is an individual nurse practitioner in Encinitas, California, licensed in California (22548) and active in the NPI registry since October 2012. She is enrolled in Medicare PECOS, maintains 7 additional practice locations, and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 7
Other Identifiers 4
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Marti L. Willey N.p. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Marti Willey reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 1,051 clinicians in this Medicare group
Fresno, CA 93720
- Reassigned Medicare billing, California enrollment
- 75 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92024 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ENCINITAS, CA 92024
ENCINITAS, CA 92024
ENCINITAS, CA 92024
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marti Willey's NPI number?
The NPI number for Marti Willey is 1144574062. It was assigned to this individual provider in the NPPES registry on October 30, 2012.
Where is Marti Willey located?
Marti Willey practices at 326 Santa Fe Dr Ste 105, Encinitas, CA 92024. The listed phone number is (760) 452-3340.
What is Marti Willey's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Marti Willey enrolled in Medicare?
Yes. Marti Willey is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Marti Willey's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marti Willey reassigns Medicare benefits to 2 organizations: Regents Of The University Of California (San Diego, CA) and California Cancer Associates For Research And Excellence Inc (Fresno, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marti Willey's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Marti Willey was last updated on December 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Marti L. Willey, N.P. · NPI 1144574062
Nurse Practitioner physician in Encinitas, California. Individual provider, active in the CMS NPPES registry since October 30, 2012.
## Identity
- **NPI:** 1144574062 (Entity type: Individual)
- **Enumerated:** October 30, 2012
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 22548 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 326 SANTA FE DR STE 105, Encinitas, CA 92024-5157
- **Phone:** (760) 452-3340 · **Fax:** (760) 452-3344
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1487772380, San Diego, CA); California Cancer Associates For Research And Excellence Inc (NPI 1083661607, Fresno, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** December 22, 2025
- **Other identifiers:** Other GT229Z (CA); Other 2012003305 (CA); Other 22548 (CA); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1144574062) · Data from the CMS NPPES public registry.