ANNE MARIE WILLIAMSON LMSW
NPI 1245569185
Social Worker in Plymouth, MI
About Anne Marie Williamson Lmsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANNE MARIE WILLIAMSON LMSW (NPI 1245569185) is an individual social worker in Plymouth, Michigan, licensed in Michigan (680-106-8377) and active in the NPI registry since December 2009. She is enrolled in Medicare PECOS and is a graduate of Wayne State University School Of Medicine (1993).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Anne Marie Williamson Lmsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Anne Williamson reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Plymouth, MI 48170
- Reassigned Medicare billing, Michigan enrollment
Mt Pleasant, MI 48858
- Reassigned Medicare billing, Michigan enrollment
- 63 clinicians in this Medicare group
Grand Rapids, MI 49548
- Reassigned Medicare billing, Michigan enrollment
- 261 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Anne Williamson's NPI number?
The NPI number for Anne Williamson is 1245569185. It was assigned to this individual provider in the NPPES registry on December 23, 2009. The provider is also known as Anne Marie Johnston Bsw.
Where is Anne Williamson located?
Anne Williamson practices at 192 N. Main St, Plymouth, MI 48170. The listed phone number is (734) 459-6016.
What is Anne Williamson's specialty?
The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.
Is Anne Williamson enrolled in Medicare?
Yes. Anne Williamson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Anne Williamson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Anne Williamson reassigns Medicare benefits to 3 organizations: Anne Williamson Counseling PLLC (Plymouth, MI), Community Mental Health For Central Michigan (Mt Pleasant, MI) and Pine Rest Christian Mental Health Services (Grand Rapids, MI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Anne Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Anne Williamson accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Oscar Insurance Company, Priority Health and UnitedHealthcare list Anne Williamson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Anne Williamson was last updated on May 8, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Anne Marie Williamson, LMSW · NPI 1245569185
Social Worker provider in Plymouth, Michigan. Individual provider, active in the CMS NPPES registry since December 23, 2009.
## Identity
- **NPI:** 1245569185 (Entity type: Individual)
- **Enumerated:** December 23, 2009
- **Primary specialty:** Social Worker · taxonomy 104100000X
- **State license:** 680-106-8377 (Michigan)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 192 N. MAIN ST, Plymouth, MI 48170
- **Phone:** (734) 459-6016
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Anne Williamson Counseling PLLC (NPI 1457826075, Plymouth, MI); Community Mental Health For Central Michigan (NPI 1881622892, Mt Pleasant, MI); Pine Rest Christian Mental Health Services (NPI 1922019157, Grand Rapids, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wayne State University School Of Medicine, class of 1993
## Record status
- **NPPES last updated:** May 8, 2019
---
Source: [NPI Profile](https://npiprofile.com/npi/1245569185) · Data from the CMS NPPES public registry.