MICHAEL BRENNAN (DO) – Endocrinology, Diabetes & Metabolism Physician, NPI 1689889388
Endocrinology, Diabetes & Metabolism Physician
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Profile Insights
NPPES metrics only — not quality of care.
300 ENDOCRINOLOGY in MI
Provider Addresses for MICHAEL BRENNAN (DO)
468 Cadieux Rd
Grosse Pointe, MI 482301507
Phone: (313) 473-1000
Type: Location
28050 Grand River Ave
Farmington Hills, MI 483365919
Phone: (947) 521-8000
Type: Location
29751 LITTLE MACK AVE STE A
ROSEVILLE, MI 480666504
Phone: (586) 447-4000
Type: Location
23715 LITTLE MACK AVE STE 100
SAINT CLAIR SHORES, MI 480801181
Phone: (586) 447-8021
Type: Location
1555 South Blvd E Ste 360
Rochester Hills, MI 483075759
Phone: (248) 258-8740
Type: Location
17412 W 13 Mile Rd
Beverly Hills, MI 480255439
Phone: (248) 258-8740
Type: Location
Beaumont Boulevard, Southfield, Oakland County, Michigan, 48034, United States
SOUTHFIELD, MI 480333849
Phone:
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 157 Open Payments records for all available years, with a total value of $144,683.
Total Amount is formed as General ($144,683) + Research ($0) + Ownership ($0) = $144,683.
Last reported payment date: 2024-12-12 • Largest payer in this snapshot: Novo Nordisk Inc ($91,193).
Total Amount
$144,683
General + Research + Ownership
Payments
157
Total payment records
General Amount
$144,683
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-12
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Novo Nordisk Inc | $91,193 |
| Bayer Healthcare Pharmaceuticals Inc. | $36,862 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $9,113 |
| Lilly USA, LLC | $6,927 |
| Abbott Laboratories | $477 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2012-10-02
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20121002000368 | I | Endocrinology | MI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 188 | 74 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 70 | 58 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 59 | 59 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 18 | 18 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 13 | 12 | $0 |
Insurance plans in this area (ZIP 48230)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ENDOCRINOLOGY | MI | 83036 | Hemoglobin A1C level | 202 | 141 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MI | |
| Hematology/Oncology, Internal Medicine | MI | |
| P S Y C H I A T R Y | MI | |
| - | MI | |
| Internal Medicine, Cardiovascular Disease (Cardiology) | MI | |
| Interventional Cardiology, Cardiovascular Disease (Cardiology) | MI | |
| - | MI | |
| - | MI | |
| - | MI | |
| - | MI |
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