SYNTHESIS MEDICAL SPECIALTIES, P.C.
NPI 1558557983
Internal Medicine - Geriatric Medicine in Fenton, MI
About Synthesis Medical Specialties, P.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SYNTHESIS MEDICAL SPECIALTIES, P.C. (NPI 1558557983) is a healthcare organization registered as a geriatric medicine in Fenton, Michigan and active in the NPI registry since September 2007. The organization lists Matthew Weiss, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
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)
Synthesis Medical Specialties, P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by December 31, 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
2Medicare enrollment records show 2 clinicians reassign Medicare billing to Synthesis Medical Specialties, P.C., which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.
Clinicians, nearest first (2)
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 Synthesis Medical Specialties, P.C.'s NPI number?
The NPI number for Synthesis Medical Specialties, P.C. is 1558557983. It was assigned to this organization in the NPPES registry on September 19, 2007.
Where is Synthesis Medical Specialties, P.C. located?
Synthesis Medical Specialties, P.C. is located at 1 Chateaux Du Lac, Fenton, MI 48430. The listed phone number is (810) 603-3702.
What is Synthesis Medical Specialties, P.C.'s specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.
Is Synthesis Medical Specialties, P.C. enrolled in Medicare?
Yes. Synthesis Medical Specialties, P.C. is registered in the Medicare PECOS enrollment system.
When is Synthesis Medical Specialties, 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 (Michigan, Clinic/Group Practice) is due for revalidation by December 31, 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 Synthesis Medical Specialties, P.C.?
According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Synthesis Medical Specialties, P.C., in Endocrinology and Geriatric Medicine. 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. Of these, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Synthesis Medical Specialties, P.C. accept?
Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Synthesis Medical Specialties, 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 Synthesis Medical Specialties, P.C. was last updated on March 17, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Synthesis Medical Specialties, P.c. · NPI 1558557983
Geriatric Medicine organization in Fenton, Michigan. Organization record, active in the CMS NPPES registry since September 19, 2007.
## Identity
- **NPI:** 1558557983 (Entity type: Organization)
- **Enumerated:** September 19, 2007
- **Primary specialty:** Internal Medicine - Geriatric Medicine · taxonomy 207RG0300X
- **Organization subpart:** No
- **Authorized official:** Matthew Weiss, OWNER
## Practice location
- **Address:** 1 CHATEAUX DU LAC, Fenton, MI 48430-9140
- **Phone:** (810) 603-3702 · **Fax:** (810) 603-3704
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** December 31, 2026 (Non-DME Part B, Michigan, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 2 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Endocrinology (1), Geriatric Medicine (1); 1 practice at this address and 2 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 17, 2023
---
Source: [NPI Profile](https://npiprofile.com/npi/1558557983) · Data from the CMS NPPES public registry.