What is Charissa Chang's specialty?

Charissa Chang (NPI 1649299686) is a Medicare-billing provider whose primary specialty is Gastroenterology in New York, NY.

Where does Charissa Chang practice?

Charissa Chang practices in New York, NY, based on the location reported in the CMS Medicare provider datasets for NPI 1649299686.

How much does Medicare pay Charissa Chang?

Charissa Chang (NPI 1649299686) received approximately $24K in total Medicare Part B payments, serving 126 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1649299686

Charissa ChangMD

GastroenterologyNew York, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

175

Unique beneficiaries

—

Total services

327

Distinct HCPCS

Medicare payment

$20K

Peer benchmark

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

PRESCRIBING · PART D · 2024

Total Rx claims

2,468

Beneficiaries

—

Total drug cost

$858K

Distinct drugs

Brand share

20.8%

Top prescribed drugs

Tacrolimus515 claims

Tenofovir Alafenamide260 claims

Ursodiol210 claims

Entecavir133 claims

Mycophenolate Mofetil95 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$157

Payment records

By payment type

Food and Beverage$157

Top paying entities

Food and Beverage$157

REFERRAL NETWORK

Where Charissa 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). 16 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MOUNT SINAI HOSPITAL	105	877
Jennifer Leong Gastroenterology · New York, NY	24	86
Joseph Odin Gastroenterology · New York, NY	23	70
Ally Rosen Diagnostic Radiology · New York, NY	18	39
Priya Grewal Gastroenterology · New York, NY	16	67
Jawad Ahmad Gastroenterology · New York, NY	15	96
Hyung Leona Kim Gastroenterology · New York, NY	15	40
Bioreference Health, Llc Clinical Laboratory · Elmwood Park, NJ	15	48
LIU, LAWRENCE	14	90
TRANSCARE NEW YORK, INC.	13	25
Manjil Chatterji Diagnostic Radiology · New York, NY	13	34
Serge Sicular Diagnostic Radiology · New York, NY	13	32

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