MICHAEL BRENNAN DO
NPI 1689889388
Internal Medicine - Endocrinology, Diabetes & Metabolism in Saint Clair Shores, MI
About Michael Brennan Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL BRENNAN DO (NPI 1689889388) is an individual endocrinology, diabetes & metabolism provider in Saint Clair Shores, Michigan, licensed in Michigan (5101016966) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with Beaumont Hospital - Dearborn, and maintains 4 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 4
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 Brennan Do 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 Reassignment
Medicare enrollment records show Michael Brennan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Royal Oak, MI 48073
- Reassigned Medicare billing, Michigan enrollment
- 1,030 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 6
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beaumont Hospital - Dearborn
Acute Care Hospitals · Dearborn, MIBeaumont Hospital - Grosse Pointe
Acute Care Hospitals · Grosse Pointe, MIBeaumont Hospital Royal Oak
Acute Care Hospitals · Royal Oak, MIBeaumont Hospital, Troy
Acute Care Hospitals · Troy, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48080 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.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT CLAIR SHORES, MI 48080
SAINT CLAIR SHORES, MI 48080
SAINT CLAIR SHORES, MI 48080
SAINT CLAIR SHORES, MI 48080
SAINT CLAIR SHORES, MI 48080
SAINT CLAIR SHORES, MI 48080
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 Brennan's NPI number?
The NPI number for Michael Brennan is 1689889388. It was assigned to this individual provider in the NPPES registry on May 14, 2007.
Where is Michael Brennan located?
Michael Brennan practices at 23715 Little Mack Ave Ste 100, Saint Clair Shores, MI 48080. The listed phone number is (586) 447-8021.
What is Michael Brennan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Michael Brennan enrolled in Medicare?
Yes. Michael Brennan 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 organization bills Medicare for Michael Brennan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Brennan reassigns Medicare benefits to Beaumont Medical Group- Specialty Services (Royal Oak, MI). The 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 Brennan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Brennan 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 Michael Brennan 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 Brennan affiliated with any hospitals?
According to CMS data, Michael Brennan is affiliated with Beaumont Hospital - Dearborn, Beaumont Hospital - Grosse Pointe, Beaumont Hospital Royal Oak and Beaumont Hospital, Troy.
When was this NPI record last updated?
The NPPES record for Michael Brennan was last updated on August 21, 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.
# Michael Brennan, DO · NPI 1689889388
Endocrinology, Diabetes & Metabolism physician in Saint Clair Shores, Michigan. Individual provider, active in the CMS NPPES registry since May 14, 2007.
## Identity
- **NPI:** 1689889388 (Entity type: Individual)
- **Enumerated:** May 14, 2007
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** 5101016966 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 23715 LITTLE MACK AVE STE 100, Saint Clair Shores, MI 48080-1181
- **Phone:** (586) 447-8021
## 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:** Beaumont Medical Group- Specialty Services (NPI 1578072906, Royal Oak, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 2006
## Record status
- **NPPES last updated:** August 21, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1689889388) · Data from the CMS NPPES public registry.