Marissa Niemeyer, MSN, AGPCNP-C
NPI 1003485194 · Gerontology Nurse Practitioner · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Niemeyer, MSN, AGPCNP-C is a Gerontology Nurse Practitioner provider in Grand Rapids, MI (NPI 1003485194).
Provider details
- NPI number
- 1003485194
- Entity type
- Individual
- Primary specialty
- Gerontology Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, AGPCNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 4704330088 (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 tenure25% of score
4 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,487 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 595 | $87 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 259 | $60 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 197 | $87 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 172 | $51 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 91 | $38 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Empagliflozinbrand: Jardiance | 220 | 14 |
| Atorvastatin Calcium | 212 | 41 |
| Famotidine | 176 | 30 |
| Sitagliptin Phosphatebrand: Januvia | 173 | 11 |
| Apixabanbrand: Eliquis | 132 | 17 |
| Levothyroxine Sodium | 117 | 22 |
| Trazodone Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$457 across 10 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
- 2021-06-22
- Last updated
- 2025-01-31
- Certified
- 2025-01-31
Frequently asked questions
- What is Marissa Niemeyer's NPI number?
- Marissa Niemeyer's National Provider Identifier (NPI) is 1003485194, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Niemeyer's specialty?
- Marissa Niemeyer is listed in the NPPES registry with a primary specialty of Gerontology Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marissa Niemeyer located?
- Marissa Niemeyer's practice location on file with NPPES is 145 Michigan St Ne Ste 3410, Grand Rapids, MI 49503-2563.
- What is Marissa Niemeyer's phone number?
- The practice phone number listed in the NPPES registry for Marissa Niemeyer is (616) 391-9945.
- Does Marissa Niemeyer accept Medicare?
- Marissa Niemeyer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Niemeyer's NPI active?
- Yes — Marissa Niemeyer's NPI (1003485194) is active in the NPPES registry as of the last update on 2025-01-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.