What is John Chang's specialty?

John Chang (NPI 1780692517) is a Medicare-billing provider whose primary specialty is Gastroenterology in Tampa, FL.

Where does John Chang practice?

John Chang practices in Tampa, FL, based on the location reported in the CMS Medicare provider datasets for NPI 1780692517.

How much does Medicare pay John Chang?

John Chang (NPI 1780692517) received approximately $174K in total Medicare Part B payments, serving 266 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1780692517

John ChangM.D.,FACP,FACG

GastroenterologyTampa, FLI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

503

Unique beneficiaries

—

Total services

614

Distinct HCPCS

Medicare payment

$62K

Peer benchmark

Total Medicare services vs. 1,135 Gastroenterology providers in FL — top quintile (cohort median 817).

PRESCRIBING · PART D · 2024

Total Rx claims

863

Beneficiaries

—

Total drug cost

$147K

Distinct drugs

Brand share

22.8%

Top prescribed drugs

Famotidine307 claims

Pantoprazole Sodium147 claims

Dicyclomine Hcl112 claims

Linaclotide49 claims

Diphenoxylate Hcl/Atropine46 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$913

Payment records

By payment type

Food and Beverage$913

Top paying entities

Food and Beverage$913

REFERRAL NETWORK

Where John Chang'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
WEST FLORIDA - TCH, LLC	91	203
Amir Awad Gastroenterology · Tampa, FL	46	101
FLORIDA SURGERY CENTER ENTERPRISES LLC	45	90
BOGGIO, RAUL	34	90
Laboratory Corporation Of America Clinical Laboratory · Tampa, FL	22	75
PEREZ-MILLAN, ROBERTO	21	70
Pedro Troya Endocrinology · Tampa, FL	13	40
Hillsborough County Florida Board Of County Commissioners Ambulance Service Provider · Tampa, FL	11	17

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