Marissa Walker, FNP-C
NPI 1487261392 · Family Nurse Practitioner · Novi, MI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Walker, FNP-C is a Family Nurse Practitioner provider in Novi, MI (NPI 1487261392).
Provider details
- NPI number
- 1487261392
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 4704304415 (MI)
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 tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 15 |
| Mirtazapine | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-09-24
- Last updated
- 2024-02-06
- Certified
- 2024-02-06
Frequently asked questions
- What is Marissa Walker's NPI number?
- Marissa Walker's National Provider Identifier (NPI) is 1487261392, 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 41850 W 11 Mile Rd Ste 202, Novi, MI 48375-1857.
- What is Marissa Walker's phone number?
- The practice phone number listed in the NPPES registry for Marissa Walker is (248) 860-4634.
- 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 (1487261392) is active in the NPPES registry as of the last update on 2024-02-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.