MICHAEL W. MARCUS, M.D., P.C.
NPI 1780891697
Social Worker - Clinical in Winchester, MA
About Michael W. Marcus, M.d., P.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL W. MARCUS, M.D., P.C. (NPI 1780891697) is a healthcare organization registered as a clinical in Winchester, Massachusetts and active in the NPI registry since May 2007. The organization lists Michael W. Marcus, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 3
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Michael W. Marcus, M.d., P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by November 30, 2026
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
5Medicare enrollment records show 5 clinicians reassign Medicare billing to Michael W. Marcus, M.D., P.C., which bills Medicare for the services they deliver. They are listed nearest first.
Clinicians, nearest first (5)
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 Michael W. Marcus, M.D., P.C.'s NPI number?
The NPI number for Michael W. Marcus, M.D., P.C. is 1780891697. It was assigned to this organization in the NPPES registry on May 17, 2007.
Where is Michael W. Marcus, M.D., P.C. located?
Michael W. Marcus, M.D., P.C. is located at 898 Main St, Winchester, MA 01890. The listed phone number is (781) 721-2737.
What is Michael W. Marcus, M.D., P.C.'s specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Michael W. Marcus, M.D., P.C. enrolled in Medicare?
Yes. Michael W. Marcus, M.D., P.C. is registered in the Medicare PECOS enrollment system.
When is Michael W. Marcus, M.D., P.C.'s Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Massachusetts, Clinic/Group Practice) is due for revalidation by November 30, 2026. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Michael W. Marcus, M.D., P.C.?
According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians reassign their Medicare billing to Michael W. Marcus, M.D., P.C., in Certified Clinical Nurse Specialist (CNS), Clinical Social Worker, Nurse Practitioner and Psychiatry. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Michael W. Marcus, M.D., P.C. accept?
Health plans from Anthem Blue Cross and Blue Shield list Michael W. Marcus, M.D., P.C. 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 Michael W. Marcus, M.D., P.C. was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.
# Michael W. Marcus, M.d., P.c. · NPI 1780891697
Clinical organization in Winchester, Massachusetts. Organization record, active in the CMS NPPES registry since May 17, 2007.
## Identity
- **NPI:** 1780891697 (Entity type: Organization)
- **Enumerated:** May 17, 2007
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **Organization subpart:** No
- **Authorized official:** Michael Marcus, PRESIDENT
## Practice location
- **Address:** 898 MAIN ST, Winchester, MA 01890-1913
- **Phone:** (781) 721-2737
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** November 30, 2026 (Non-DME Part B, Massachusetts, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 5 clinicians in 4 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Psychiatry (2), Certified Clinical Nurse Specialist (CNS) (1), Clinical Social Worker (1) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 11, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1780891697) · Data from the CMS NPPES public registry.