MARY K LEWIS LMSW
NPI 1306019732
Social Worker in Chelsea, MI
About Mary K Lewis Lmsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY K LEWIS LMSW (NPI 1306019732) is an individual social worker in Chelsea, Michigan, licensed in Michigan (6801073041) and active in the NPI registry since April 2008. She is enrolled in Medicare PECOS and is a graduate of Other (1991).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Mary K Lewis 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
2Medicare enrollment records show Mary Lewis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chelsea, MI 48118
- Reassigned Medicare billing, Michigan enrollment
- 147 clinicians in this Medicare group
Chelsea, MI 48118
- Reassigned Medicare billing, Michigan enrollment
- 1,480 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.
Other Providers at the Same Location NPPES 16
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHELSEA, MI 48118
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 Mary Lewis's NPI number?
The NPI number for Mary Lewis is 1306019732. It was assigned to this individual provider in the NPPES registry on April 7, 2008.
Where is Mary Lewis located?
Mary Lewis practices at 350 North Main Street Ste 150, Chelsea, MI 48118. The listed phone number is (734) 593-5251.
What is Mary Lewis's specialty?
The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.
Is Mary Lewis enrolled in Medicare?
Yes. Mary Lewis 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 Mary Lewis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Lewis reassigns Medicare benefits to 2 organizations: Chelsea Community Hospital (Chelsea, MI) and Iha Health Services Corporation (Chelsea, 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 Mary Lewis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Lewis accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 2 other insurers list Mary Lewis 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 Mary Lewis was last updated on July 30, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Mary K Lewis, LMSW · NPI 1306019732
Social Worker provider in Chelsea, Michigan. Individual provider, active in the CMS NPPES registry since April 7, 2008.
## Identity
- **NPI:** 1306019732 (Entity type: Individual)
- **Enumerated:** April 7, 2008
- **Primary specialty:** Social Worker · taxonomy 104100000X
- **State license:** 6801073041 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 350 NORTH MAIN STREET, STE 150, Chelsea, MI 48118
- **Phone:** (734) 593-5251 · **Fax:** (734) 593-5255
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Chelsea Community Hospital (NPI 1912947409, Chelsea, MI); Iha Health Services Corporation (NPI 1477040343, Chelsea, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1991
## Record status
- **NPPES last updated:** July 30, 2024
- **Other identifiers:** Other 750910829 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1306019732) · Data from the CMS NPPES public registry.