What is Gregg Zimmerman's specialty?

Gregg Zimmerman (NPI 1790766228) is a Medicare-billing provider whose primary specialty is Urology in Denville, NJ.

Where does Gregg Zimmerman practice?

Gregg Zimmerman practices in Denville, NJ, based on the location reported in the CMS Medicare provider datasets for NPI 1790766228.

How much does Medicare pay Gregg Zimmerman?

Gregg Zimmerman (NPI 1790766228) received approximately $362K in total Medicare Part B payments, serving 1,087 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1790766228

Gregg ZimmermanMD

PRACTICEMORRIS UROLOGY, PCSee all providers at this practice →

UrologyDenville, NJI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

3,681

Unique beneficiaries

—

Total services

5,334

Distinct HCPCS

Medicare payment

$263K

Peer benchmark

Total Medicare services vs. 307 Urology providers in NJ — top quintile (cohort median 4,214).

PRESCRIBING · PART D · 2024

Total Rx claims

1,387

Beneficiaries

—

Total drug cost

$245K

Distinct drugs

Brand share

32.6%

Top prescribed drugs

Tamsulosin Hcl507 claims

Finasteride174 claims

Vibegron125 claims

Mirabegron85 claims

Cefuroxime Axetil64 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$2K

Payment records

By payment type

Food and Beverage$2K

Education$55

Top paying entities

Food and Beverage$2K

Education$55

REFERRAL NETWORK

Where Gregg Zimmerman'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). 17 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Laboratory Corporation Of America Holdings Clinical Laboratory · Raritan, NJ	128	301
AHS HOSPITAL CORP.	117	322
Ara Meradian Pathology · Berkeley Heights, NJ	71	231
Gilbert Mandel Internal Medicine · Denville, NJ	48	149
Marc Colton Urology · Naples, FL	45	112
Lawrence Yu Diagnostic Radiology · Denville, NJ	35	95
Edward Solomon Diagnostic Radiology · Denville, NJ	33	66
Bioreference Health, Llc Clinical Laboratory · Elmwood Park, NJ	24	77
WEXLER, JEFFREY	22	35
SUTKER, BURTON	22	41
Neil Freeman Diagnostic Radiology · Denville, NJ	18	39
Priti Chandiwala-Mody Diagnostic Radiology · Bayonne, NJ	15	30

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

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