What is Herbert Gretz's specialty?

Herbert Gretz (NPI 1376593301) is a Medicare-billing provider whose primary specialty is Gynecological Oncology in Purchase, NY.

Where does Herbert Gretz practice?

Herbert Gretz practices in Purchase, NY, based on the location reported in the CMS Medicare provider datasets for NPI 1376593301.

How much does Medicare pay Herbert Gretz?

Herbert Gretz (NPI 1376593301) received approximately $104K in total Medicare Part B payments, serving 250 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1376593301

Herbert GretzM.D.

Gynecological OncologyPurchase, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

501

Unique beneficiaries

—

Total services

614

Distinct HCPCS

Medicare payment

$64K

Peer benchmark

Total Medicare services vs. 89 Gynecological Oncology providers in NY — top quintile (cohort median 316).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$43

Payment records

By payment type

Education$43

Top paying entities

Education$43

REFERRAL NETWORK

Where Herbert Gretz'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). 7 inbound referrers · 11 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
WHITE PLAINS HOSPITAL MEDICAL CENTER	87	393
Steven Warren Diagnostic Radiology · Mt Kisco, NY	22	62
NPI 1396877882	21	54
Stuart Feldman Hematology-Oncology · White Plains, NY	19	228
Christina Day Pathology · Los Angeles, CA	14	41
Gennifer Geller Diagnostic Radiology · White Plains, NY	13	48
MIZRACHI, HOWARD	11	14

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
WHITE PLAINS HOSPITAL MEDICAL CENTER	84	520
NPI 1396877882	22	40
GREENWICH HOSPITAL	19	117
MIZRACHI, HOWARD	18	75
Quest Diagnostics Incorporated Clinical Laboratory · Clifton, NJ	16	33
Stuart Feldman Hematology-Oncology · White Plains, NY	16	130
Peter Hobeika Diagnostic Radiology · New York, NY	14	48
Gennifer Geller Diagnostic Radiology · White Plains, NY	12	31
Christina Day Pathology · Los Angeles, CA	12	31
Matthew Weissler Hematology-Oncology · White Plains, NY	11	105
ROJAS, PEDRO	11	35

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