What is Ann Chen's specialty?

Ann Chen (NPI 1003840307) is a Medicare-billing provider whose primary specialty is Gastroenterology in Stanford, CA.

Where does Ann Chen practice?

Ann Chen practices in Stanford, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1003840307.

How much does Medicare pay Ann Chen?

Ann Chen (NPI 1003840307) received approximately $17K in total Medicare Part B payments, serving 112 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1003840307

Ann ChenMD

GastroenterologyStanford, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

106

Unique beneficiaries

—

Total services

107

Distinct HCPCS

Medicare payment

$7K

Peer benchmark

Total Medicare services vs. 1,398 Gastroenterology providers in CA — bottom quintile (cohort median 750).

PRESCRIBING · PART D · 2024

Total Rx claims

105

Beneficiaries

—

Total drug cost

$7K

Distinct drugs

Brand share

22.9%

Top prescribed drugs

Omeprazole47 claims

Entecavir17 claims

Famotidine17 claims

Linaclotide12 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl12 claims

QUALITY · MIPS · 2024

Final MIPS score

61.0

Quality

59.4

Cost

71.5

Improvement activities

40.0

Promoting interop.

0.0

Payment adjustment

-1.68%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 050038

Hospital

REFERRAL NETWORK

Where Ann Chen'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). 2 inbound referrers · 7 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
COUNTY OF SANTA CLARA	95	430
Young Kang Diagnostic Radiology · San Jose, CA	11	20

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
COUNTY OF SANTA CLARA	120	680
Young Kang Diagnostic Radiology · San Jose, CA	14	26
STANFORD HEALTH CARE	13	43
COUNTY OF SANTA CLARA	13	35
Rashmi Batra Pathology · Duarte, CA	12	37
Wendy Wu Pathology · San Jose, CA	11	29
Caroline Temmins Pathology · Stanford, CA	11	25

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