DR. GEORGE GRUNBERGER (MD) – Endocrinology, Diabetes & Metabolism Physician, NPI 1477558450
Endocrinology, Diabetes & Metabolism Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
7,218 INTERNAL MEDICINE in MI
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Provider Addresses for DR. GEORGE GRUNBERGER (MD)
Woodward Avenue, Bloomfield Hills, Oakland County, Michigan, 48304, United States
STE 208
BLOOMFIELD HILLS, MI 483025054
Phone: (248) 335-7740
Fax: (248) 338-7979
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 394 Open Payments records for all available years, with a total value of $196,850.
Total Amount is formed as General ($196,100) + Research ($750) + Ownership ($0) = $196,850.
Last reported payment date: 2024-12-24 • Largest payer in this snapshot: Lilly USA, LLC ($120,787).
Total Amount
$196,850
General + Research + Ownership
Payments
394
Total payment records
General Amount
$196,100
General payments
Research Amount
$750
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-24
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Lilly USA, LLC | $120,787 |
| SANOFI-AVENTIS U.S. LLC | $34,811 |
| Abbott Laboratories | $13,966 |
| Ipsen Bioscience Inc. | $8,978 |
| CeQur Corporation | $4,686 |
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: 2010-08-05
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 |
|---|---|---|---|---|
| I20100805000039 | I | Internal Medicine | 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 |
|---|---|---|---|---|
| 83036 | Hemoglobin a1c level | 607 | 227 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 559 | 217 | $0 |
| 95251 | Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 335 | 123 | $0 |
| 82947 | Blood glucose (sugar) level | 334 | 145 | $0 |
| 97535 | Training for self-care or home management, each 15 minutes | 115 | 38 | $0 |
Insurance plans in this area (ZIP 48302)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Endocrinology, Internal Medicine | MI | |
| E N D O C R I N O L O G Y | MI |
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