Marci Witkowski, LMSW
NPI 1972057081 · Clinical Social Worker · Greenville, MI
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marci Witkowski, LMSW is a Clinical Social Worker provider in Greenville, MI (NPI 1972057081).
Provider details
- NPI number
- 1972057081
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LMSW
- Sex
- Female
- Sole proprietor
- No
- License
- 6801100020 (MI)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 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
- 2016-08-05
- Last updated
- 2026-01-26
- Certified
- 2026-01-26
Frequently asked questions
- What is Marci Witkowski's NPI number?
- Marci Witkowski's National Provider Identifier (NPI) is 1972057081, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marci Witkowski's specialty?
- Marci Witkowski is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Marci Witkowski located?
- Marci Witkowski's practice location on file with NPPES is 1202 W Oak St, Greenville, MI 48838-2155.
- What is Marci Witkowski's phone number?
- The practice phone number listed in the NPPES registry for Marci Witkowski is (616) 754-2944.
- Does Marci Witkowski accept Medicare?
- Marci Witkowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marci Witkowski's NPI active?
- Yes — Marci Witkowski's NPI (1972057081) is active in the NPPES registry as of the last update on 2026-01-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.