caretrace.iopowered by▸healthparse
SearchCohort Builder
Tools▾
KOL FinderTerritoriesDrug Compare
AI Query
Browse▾
By stateBy specialty
Pricing
SearchCohort BuilderToolsKOL FinderTerritoriesDrug CompareAI QueryBrowseBy stateBy specialtyPricing
PROVIDER PROFILE · NPI 1013909407

Isaac Tsai

Internal MedicineCorona, CAI
CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore
OIG/SAM exclusion screening, sanctions history
© 2026 CareTrace
PricingContactPrivacyTerms
QUALITY · MIPS · 2024
No data available for this provider in 2024.
MEDICARE UTILIZATION · PART B · 2024
No data available for this provider in 2024.
PRESCRIBING · PART D · 2024
No data available for this provider in 2024.
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
REFERRAL NETWORK

Where Isaac Tsai'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). 44 inbound referrers · 112 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
UHS-CORONA INC372995
Michael Chan
Diagnostic Radiology · San Diego, CA
133269
Unilab Corporation
Clinical Laboratory · West Hills, CA
128334
Bruce Omiya
Diagnostic Radiology · Anaheim, CA
110198
John Kirby
Diagnostic Radiology · Anaheim, CA
99253
Gilbert Plasencia
Cardiology · Corona, CA
84159
Darice Liu
Interventional Radiology · Orange, CA
82213
L R Moscoso
Cardiology · Corona, CA
80142
Michael Molinari
Gastroenterology · Corona, CA
75260
KEATING, RUSSELL68123
Andrew Cheung
Nephrology · Corona, CA
41232
MISSION AMBULANCE INC3787
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
UHS-CORONA INC4991,312
Michael Chan
Diagnostic Radiology · San Diego, CA
198417
American Medical Response Ambulance Service, Inc.
Ambulance Service Provider · Riverside, CA
195385
John Kirby
Diagnostic Radiology · Anaheim, CA
152383
Bruce Omiya
Diagnostic Radiology · Anaheim, CA
143295
Thomas Lee
Diagnostic Radiology · Anaheim, CA
142243
POLITOSKE, EDWARD141869
Darice Liu
Interventional Radiology · Orange, CA
137278
Aimee French
Pulmonary Disease · Riverside, CA
131636
MISSION AMBULANCE INC122229
KEATING, RUSSELL117210
LAU, FRED113203
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.