What is Ghassan Zalzaleh's specialty?

Ghassan Zalzaleh (NPI 1992704035) is a Medicare-billing provider whose primary specialty is Internal Medicine in Oak Lawn, IL.

Where does Ghassan Zalzaleh practice?

Ghassan Zalzaleh practices in Oak Lawn, IL, based on the location reported in the CMS Medicare provider datasets for NPI 1992704035.

How much does Medicare pay Ghassan Zalzaleh?

Ghassan Zalzaleh (NPI 1992704035) received approximately $3.8M in total Medicare Part B payments, serving 679 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1992704035

Ghassan ZalzalehMD

PRACTICEAFFILIATED ONCOLOGISTS, LLCSee all providers at this practice →

Internal MedicineOak Lawn, ILI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

2,640

Unique beneficiaries

—

Total services

121,387

Distinct HCPCS

Medicare payment

$2.4M

Peer benchmark

Total Medicare services vs. 3,790 Internal Medicine providers in IL — top quintile (cohort median 760).

PRESCRIBING · PART D · 2024

Total Rx claims

316

Beneficiaries

—

Total drug cost

$802K

Distinct drugs

Brand share

43.0%

Top prescribed drugs

Apixaban64 claims

Prednisone44 claims

Hydrocodone/Acetaminophen33 claims

Lenalidomide28 claims

Imatinib Mesylate23 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$8K

Payment records

208

By payment type

Food and Beverage$5K

Consulting Fee$3K

Education$304

Top paying entities

Food and Beverage$5K

Consulting Fee$3K

Education$304

REFERRAL NETWORK

Where Ghassan Zalzaleh'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). 56 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
High Technology Inc Independent Diagnostic Testing Facility (IDTF) · Palos Heights, IL	63	224
Masood Qazi Cardiology · Oak Lawn, IL	55	210
Beck Hur Diagnostic Radiology · Lake Forest, IL	47	82
PIERCE, KENNETH	46	129
Mahmoud Mahafzah Hematology-Oncology · Chicago Ridge, IL	38	191
Mauna Pandya Hematology-Oncology · Oak Lawn, IL	38	113
James Song Diagnostic Radiology · Oak Lawn, IL	37	87
Yanxia Li Pathology · Oak Lawn, IL	37	111
Jeffrey Neiger Clinical Cardiac Electrophysiology · Oak Lawn, IL	33	93
HELLER, RICHARD	30	47
Anisha Martin Diagnostic Radiology · Oak Lawn, IL	28	53
WALLOCH, JAMI	28	64

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