Marissa Hay, FNP
NPI 1346006913 · Family Nurse Practitioner · Washington, DC
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Hay, FNP is a Family Nurse Practitioner provider in Washington, DC (NPI 1346006913).
Provider details
- NPI number
- 1346006913
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- NP1047327 (DC)
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tacrolimus | 66 | 29 |
| Amlodipine Besylate | 16 | — |
| Ursodiol | 13 | — |
| Pantoprazole Sodium | 12 | — |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 11 | — |
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$144 across 2 records (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
- 2024-02-22
- Last updated
- 2024-02-22
- Certified
- 2024-02-22
Frequently asked questions
- What is Marissa Hay's NPI number?
- Marissa Hay's National Provider Identifier (NPI) is 1346006913, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Hay's specialty?
- Marissa Hay is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marissa Hay located?
- Marissa Hay's practice location on file with NPPES is 3800 Reservoir Rd Nw, Washington, DC 20007-2113.
- What is Marissa Hay's phone number?
- The practice phone number listed in the NPPES registry for Marissa Hay is (410) 772-6500.
- Does Marissa Hay accept Medicare?
- Marissa Hay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Hay's NPI active?
- Yes — Marissa Hay's NPI (1346006913) is active in the NPPES registry as of the last update on 2024-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.