What is George Grunberger's specialty?

George Grunberger (NPI 1477558450) is a Medicare-billing provider whose primary specialty is Internal Medicine in Bloomfield Hills, MI.

Where does George Grunberger practice?

George Grunberger practices in Bloomfield Hills, MI, based on the location reported in the CMS Medicare provider datasets for NPI 1477558450.

How much does Medicare pay George Grunberger?

George Grunberger (NPI 1477558450) received approximately $102K in total Medicare Part B payments, serving 260 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1477558450

George GrunbergerMD

Internal MedicineBloomfield Hills, MII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,099

Unique beneficiaries

—

Total services

2,510

Distinct HCPCS

Medicare payment

$99K

Peer benchmark

Total Medicare services vs. 3,459 Internal Medicine providers in MI — top quintile (cohort median 549).

PRESCRIBING · PART D · 2024

Total Rx claims

1,518

Beneficiaries

—

Total drug cost

$1.2M

Distinct drugs

Brand share

69.3%

Top prescribed drugs

Tirzepatide200 claims

Metformin Hcl200 claims

Semaglutide82 claims

Dapagliflozin Propanediol79 claims

Empagliflozin76 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$139K

Payment records

239

By payment type

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$87K

Consulting Fee$14K

Travel and Lodging$12K

Compensation for serving as faculty or as a speaker for a medical education program$10K

Honoraria$9K

Top paying entities

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$87K

Consulting Fee$14K

Travel and Lodging$12K

Compensation for serving as faculty or as a speaker for a medical education program$10K

Honoraria$9K

REFERRAL NETWORK

Where George Grunberger's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 12 inbound referrers · 19 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
ST JOSEPH MERCY HOSPITAL-SMHC	67	201
Anjana Myneni Endocrinology · Bloomfield Hills, MI	56	160
AMAN, LINDA	45	128
Biotech Clinical Laboratories Inc Clinical Laboratory · Novi, MI	27	94
MCLAREN OAKLAND	20	74
WILLIAM BEAUMONT HOSPITAL	17	39
Kiritkumar Patel Cardiology · Bloomfield Hills, MI	16	71
HENRY FORD HEALTH ST. JOHN HOSPITAL	15	48
William Wilkinson Ophthalmology · Pontiac, MI	13	25
HENRY FORD HEALTH SYSTEM	11	34
HENRY FORD HEALTH SYSTEM	11	31
HENRY FORD HEALTH ROCHESTER HOSPITAL	11	24

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
ST JOSEPH MERCY HOSPITAL-SMHC	65	172
AMAN, LINDA	64	217
Anjana Myneni Endocrinology · Bloomfield Hills, MI	61	163
WILLIAM BEAUMONT HOSPITAL	59	200
Quest Diagnostics Llc Il Clinical Laboratory · Wood Dale, IL	39	89
REGENTS OF THE UNIVERSITY OF MICHIGAN	29	120
Biotech Clinical Laboratories Inc Clinical Laboratory · Novi, MI	21	48
MCLAREN OAKLAND	20	67
Triad Diagnostic Technologies, Llc. Independent Diagnostic Testing Facility (IDTF) · Farmington Hills, MI	17	71
Michele Degregorio Interventional Cardiology · Bloomfield Hills, MI	16	39
WILLIAM BEAUMONT HOSPITAL	15	39
Kiritkumar Patel Cardiology · Bloomfield Hills, MI	13	45

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events