Marissa Walker, FNP
NPI 1528820578 · Family Nurse Practitioner · Exeter, CA
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Walker, FNP is a Family Nurse Practitioner provider in Exeter, CA (NPI 1528820578).
Provider details
- NPI number
- 1528820578
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 95028660 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
2 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2024-01-25
- Last updated
- 2024-01-25
- Certified
- 2024-01-25
Frequently asked questions
- What is Marissa Walker's NPI number?
- Marissa Walker's National Provider Identifier (NPI) is 1528820578, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Walker's specialty?
- Marissa Walker is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marissa Walker located?
- Marissa Walker's practice location on file with NPPES is 28959 Road 208, Exeter, CA 93221-9789.
- What is Marissa Walker's phone number?
- The practice phone number listed in the NPPES registry for Marissa Walker is (559) 280-7294.
- Does Marissa Walker accept Medicare?
- Marissa Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Walker's NPI active?
- Yes — Marissa Walker's NPI (1528820578) is active in the NPPES registry as of the last update on 2024-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.