DR. MICHAEL WILLIAM WARREN M.D.
NPI 1700140068
Radiology - Vascular & Interventional Radiology in Saginaw, MI
About Dr. Michael William Warren M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL WILLIAM WARREN M.D. (NPI 1700140068) is an individual vascular & interventional radiology provider in Saginaw, Michigan, licensed in Michigan (4301101113) and active in the NPI registry since July 2012. He is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
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
Dr. Michael William Warren 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
11Medicare enrollment records show Michael Warren reassigns Medicare billing to 11 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saginaw, MI 48603
- Reassigned Medicare billing, Michigan enrollment
- 720 clinicians in this Medicare group
Saginaw, MI 48607
- Reassigned Medicare billing, Michigan enrollment
- 229 clinicians in this Medicare group
Bay City, MI 48706
- Reassigned Medicare billing, Michigan enrollment
- 416 clinicians in this Medicare group
Bay City, MI 48708
- Reassigned Medicare billing, Michigan enrollment
- 250 clinicians in this Medicare group
Flint, MI 48532
- Reassigned Medicare billing, Michigan enrollment
- 242 clinicians in this Medicare group
Flint, MI 48532
- Reassigned Medicare billing, Michigan enrollment
- 444 clinicians in this Medicare group
Flint, MI 48532
- Reassigned Medicare billing, Michigan enrollment
- 8 clinicians in this Medicare group
Mt Pleasant, MI 48858
- Reassigned Medicare billing, Michigan enrollment
- 321 clinicians in this Medicare group
Grand Blanc, MI 48439
- Reassigned Medicare billing, Michigan enrollment
- 47 clinicians in this Medicare group
Lansing, MI 48912
- Reassigned Medicare billing, Michigan enrollment
- 167 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.
Areas of Expertise CMS Part B claims 69
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Spectrum Health
Acute Care Hospitals · Grand Rapids, MIMclaren Central Michigan
Acute Care Hospitals · Mount Pleasant, MIMclaren Flint
Acute Care Hospitals · Flint, MIMclaren Lapeer Region
Acute Care Hospitals · Lapeer, MIMclaren Oakland
Acute Care Hospitals · Pontiac, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48603 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 19
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAGINAW, MI 48603
SAGINAW, MI 48603
SAGINAW, MI 48603
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 Warren's NPI number?
The NPI number for Michael Warren is 1700140068. It was assigned to this individual provider in the NPPES registry on July 1, 2012.
Where is Michael Warren located?
Michael Warren practices at 3400 N Center Rd, Saginaw, MI 48603. The listed phone number is (989) 401-4253.
What is Michael Warren's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Vascular & Interventional Radiology, with taxonomy code 2085R0204X.
Is Michael Warren enrolled in Medicare?
Yes. Michael Warren 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 Warren's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Warren reassigns Medicare benefits to 11 organizations: Covenant Medical Center, Inc. (Saginaw, MI), Great Lakes Bay Health Centers (Saginaw, MI), Mclaren Medical Group (Bay City, MI), Mclaren Bay Region (Bay City, MI), Mclaren Flint (Flint, MI) and 6 more organizations, listed in the Medicare section above. 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 Warren's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Warren accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Michael Warren 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.
Is Michael Warren affiliated with any hospitals?
According to CMS data, Michael Warren is affiliated with Spectrum Health, Mclaren Central Michigan, Mclaren Flint, Mclaren Lapeer Region and Mclaren Oakland.
When was this NPI record last updated?
The NPPES record for Michael Warren was last updated on June 15, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.