MICHAEL TSIMIS M.D.
NPI 1174840185
Obstetrics & Gynecology - Maternal & Fetal Medicine in Troy, MI
About Michael Tsimis M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL TSIMIS M.D. (NPI 1174840185) is an individual maternal & fetal medicine provider in Troy, Michigan, licensed in Michigan (4301111316) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS and is a graduate of Wayne State University School Of Medicine (2010).
NPPES Registry Identity
Specialties & Licenses 3
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
Michael Tsimis M.d. 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
4Medicare enrollment records show Michael Tsimis reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Grand Rapids, MI 49546
- Reassigned Medicare billing, Michigan enrollment
- 2,446 clinicians in this Medicare group
Grand Rapids, MI 49503
- Reassigned Medicare billing, Michigan enrollment
- 405 clinicians in this Medicare group
Muskegon, MI 49442
- Reassigned Medicare billing, Michigan enrollment
- 23 clinicians in this Medicare group
Ludington, MI 49431
- Reassigned Medicare billing, Michigan enrollment
- 168 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48083 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Tsimis's NPI number?
The NPI number for Michael Tsimis is 1174840185. It was assigned to this individual provider in the NPPES registry on April 29, 2010.
Where is Michael Tsimis located?
Michael Tsimis practices at 3979 Mark Dr, Troy, MI 48083. The listed phone number is (248) 225-5253.
What is Michael Tsimis's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.
Is Michael Tsimis enrolled in Medicare?
Yes. Michael Tsimis 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 Michael Tsimis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Tsimis reassigns Medicare benefits to 4 organizations: Spectrum Health Primary Care Partners (Grand Rapids, MI), Spectrum Health Hospitals (Grand Rapids, MI), Mercy Women's Health Services (Muskegon, MI) and Memorial Medical Center Of West Michigan (Ludington, 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 Michael Tsimis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Tsimis accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, McLaren Health Plan Community and Priority Health list Michael Tsimis 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 Tsimis was last updated on March 2, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Michael Tsimis, M.D. · NPI 1174840185
Maternal & Fetal Medicine physician in Troy, Michigan. Individual provider, active in the CMS NPPES registry since April 29, 2010.
## Identity
- **NPI:** 1174840185 (Entity type: Individual)
- **Enumerated:** April 29, 2010
- **Primary specialty:** Obstetrics & Gynecology - Maternal & Fetal Medicine · taxonomy 207VM0101X
- **State license:** 4301111316 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 3979 MARK DR, Troy, MI 48083-5333
- **Phone:** (248) 225-5253
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Spectrum Health Primary Care Partners (NPI 1528374683, Grand Rapids, MI); Spectrum Health Hospitals (NPI 1558407189, Grand Rapids, MI); Mercy Women's Health Services (NPI 1467476143, Muskegon, MI); Memorial Medical Center Of West Michigan (NPI 1356510259, Ludington, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wayne State University School Of Medicine, class of 2010
## Record status
- **NPPES last updated:** March 2, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1174840185) · Data from the CMS NPPES public registry.