PROVIDER PROFILE · NPI 1568534964

William Fonfeder

Internal MedicineBrooklyn, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$2K

Peer benchmark

Total Medicare services vs. 7,864 Internal Medicine providers in NY — bottom quintile (cohort median 552).

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 · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where William Fonfeder'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). 36 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
George Tavoulareas Psychiatry · Santa Barbara, CA	159	432
ADVANCED MULTI DIAGNOSTIC SERVICES	133	710
ALAM, HAMID	88	185
Abdul Malik Cardiology · Brooklyn, NY	79	157
Marina Ravich Internal Medicine · Richmond Hill, NY	77	180
Bioreference Health, Llc Clinical Laboratory · Elmwood Park, NJ	73	242
Lenco Diagnostic Laboratories,inc. Clinical Laboratory · Brooklyn, NY	68	178
NPI 1225073356	53	103
ALEXIS, ELISABETH	49	86
ELSHEBINI, ISLAM	39	72
Mikhail Korogluyev Osteopathic Manipulative Medicine · Brooklyn, NY	32	199
Quality Healthcare Management Inc Clinical Laboratory · Brooklyn, NY	30	68

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