Marissa Schaefer, P.A.
NPI 1508144544 · Physician Assistant · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Schaefer, P.A. is a Physician Assistant provider in Grand Rapids, MI (NPI 1508144544).
Provider details
- NPI number
- 1508144544
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Female
- Sole proprietor
- No
- License
- 5601006554 (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
14 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-07-25
- Last updated
- 2021-02-24
- Certified
- 2021-02-24
Frequently asked questions
- What is Marissa Schaefer's NPI number?
- Marissa Schaefer's National Provider Identifier (NPI) is 1508144544, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Schaefer's specialty?
- Marissa Schaefer is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marissa Schaefer located?
- Marissa Schaefer's practice location on file with NPPES is 100 Michigan St Ne, Grand Rapids, MI 49503-2560.
- What is Marissa Schaefer's phone number?
- The practice phone number listed in the NPPES registry for Marissa Schaefer is (616) 267-8244.
- Does Marissa Schaefer accept Medicare?
- Marissa Schaefer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Schaefer's NPI active?
- Yes — Marissa Schaefer's NPI (1508144544) is active in the NPPES registry as of the last update on 2021-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.