What is Anthony Merza's specialty?

Anthony Merza (NPI 1780709337) is a Medicare-billing provider whose primary specialty is Gastroenterology in Chicago, IL.

Where does Anthony Merza practice?

Anthony Merza practices in Chicago, IL, based on the location reported in the CMS Medicare provider datasets for NPI 1780709337.

How much does Medicare pay Anthony Merza?

Anthony Merza (NPI 1780709337) received approximately $9K in total Medicare Part B payments, serving 42 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1780709337

Anthony MerzaM.D.

PRACTICEAMC ANESTHESIA LTDSee all providers at this practice →

GastroenterologyChicago, ILI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$4K

Peer benchmark

Total Medicare services vs. 606 Gastroenterology providers in IL — bottom quintile (cohort median 726).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$2K

Distinct drugs

Brand share

62.7%

Top prescribed drugs

Sodium Chloride/Nahco3/Kcl/Peg42 claims

Omeprazole13 claims

Pantoprazole Sodium12 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (2)

CCN 140114

Hospital

CCN 140197

Hospital

REFERRAL NETWORK

Where Anthony Merza'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). 8 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
LIFESCAN LABORATORY, INC.	43	212
WANGERIN, REET	42	74
TAN, AILYN	34	46
Rene Velazco Family Practice · Chicago, IL	17	53
Ermias Tilahun Internal Medicine · Chicago, IL	17	34
NIZIOLEK, ROMAN	14	20
MIFF, STEPHEN	11	40
Bharat Shah Internal Medicine · Chicago, IL	11	59

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