PROVIDER PROFILE · NPI 1639146442

Chester ZahnMD

GastroenterologySan Gabriel, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

2,069

Unique beneficiaries

—

Total services

2,761

Distinct HCPCS

Medicare payment

$230K

Peer benchmark

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

PRESCRIBING · PART D · 2024

Total Rx claims

3,053

Beneficiaries

—

Total drug cost

$252K

Distinct drugs

Brand share

18.3%

Top prescribed drugs

Bethanechol Chloride1,180 claims

Omeprazole622 claims

Isosorbide Mononitrate208 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl167 claims

Entecavir110 claims

QUALITY · MIPS · 2024

Final MIPS score

75.0

Quality

15.0

Cost

97.4

Improvement activities

0.0

Promoting interop.

0.0

Payment adjustment

0.00%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$296

Payment records

By payment type

Food and Beverage$264

Education$32

REFERRAL NETWORK

Where Chester Zahn'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). 88 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
AHMC SAN GABRIEL VALLEY MEDICAL	166	593
LIS, LEON	127	485
Wilson Wong Diagnostic Radiology · Arcadia, CA	124	423
Jose Tandoc Diagnostic Radiology · Arcadia, CA	114	420
NPI 1083649883	72	178
Unilab Corporation Clinical Laboratory · West Hills, CA	68	198
Aldric Shim Diagnostic Radiology · Monterey Park, CA	66	204
Sun Clinical Laboratories Clinical Laboratory · El Monte, CA	63	183
Daniel Garza Diagnostic Radiology · Alhambra, CA	61	160
YANG, BAO	59	212
ALAKOR HEALTHCARE LLC	59	112
Chin Shun Shih Internal Medicine · Monterey Park, CA	52	165

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