What is Joseph Mermelstein's specialty?

Joseph Mermelstein (NPI 1689963662) is a Medicare-billing provider whose primary specialty is Gastroenterology in Scarsdale, NY.

Where does Joseph Mermelstein practice?

Joseph Mermelstein practices in Scarsdale, NY, based on the location reported in the CMS Medicare provider datasets for NPI 1689963662.

How much does Medicare pay Joseph Mermelstein?

Joseph Mermelstein (NPI 1689963662) received approximately $115K in total Medicare Part B payments, serving 478 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1689963662

Joseph MermelsteinMD

GastroenterologyScarsdale, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

744

Unique beneficiaries

—

Total services

791

Distinct HCPCS

Medicare payment

$100K

Peer benchmark

Total Medicare services vs. 1,360 Gastroenterology providers in NY — above median (cohort median 521).

PRESCRIBING · PART D · 2024

Total Rx claims

323

Beneficiaries

—

Total drug cost

$71K

Distinct drugs

Brand share

23.2%

Top prescribed drugs

Pantoprazole Sodium129 claims

Omeprazole66 claims

Linaclotide34 claims

Famotidine25 claims

Sod Sulf/Pot Chloride/Mag Sulf15 claims

QUALITY · MIPS · 2024

Final MIPS score

99.2

Quality

35.0

Cost

64.8

Improvement activities

40.0

Promoting interop.

99.0

Payment adjustment

1.02%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$29

Payment records

By payment type

Food and Beverage$29

Top paying entities

Food and Beverage$29

REFERRAL NETWORK

Where Joseph Mermelstein'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). 47 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
BETH ISRAEL MEDICAL CENTER	366	1,374
New York City Health And Hospitals Corporation Ambulance Service Provider · Brooklyn, NY	114	311
TRANSCARE NEW YORK, INC.	58	116
TC AMBULANCE CORPORATION	49	142
Richard Libes Diagnostic Radiology · New York, NY	49	158
Bruce Saffran Internal Medicine · Columbus, NJ	32	81
Susan Hecht Cardiology · New York, NY	31	110
Jessica Fleischer-Black Emergency Medicine · New York, NY	29	80
David Frager Diagnostic Radiology · New York, NY	27	80
Barbara Zeifer Diagnostic Radiology · New York, NY	27	65
Morris Hayim Diagnostic Radiology · Los Angeles, CA	26	71
NPI 1225071137	25	77

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