What is Keith Hsu's specialty?

Keith Hsu (NPI 1891921458) is a Medicare-billing provider whose primary specialty is Internal Medicine in Mission Viejo, CA.

Where does Keith Hsu practice?

Keith Hsu practices in Mission Viejo, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1891921458.

How much does Medicare pay Keith Hsu?

Keith Hsu (NPI 1891921458) received approximately $55K in total Medicare Part B payments, serving 284 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1891921458

Keith HsuMD

Internal MedicineMission Viejo, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

526

Unique beneficiaries

—

Total services

995

Distinct HCPCS

Medicare payment

$54K

Peer benchmark

Total Medicare services vs. 10,499 Internal Medicine providers in CA — above median (cohort median 531).

PRESCRIBING · PART D · 2024

Total Rx claims

179

Beneficiaries

—

Total drug cost

$7K

Distinct drugs

Brand share

38.5%

Top prescribed drugs

Pantoprazole Sodium28 claims

Atorvastatin Calcium18 claims

Clopidogrel Bisulfate18 claims

Methylprednisolone16 claims

Amoxicillin/Potassium Clav16 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$170

Payment records

By payment type

Food and Beverage$170

Top paying entities

Food and Beverage$170

REFERRAL NETWORK

Where Keith Hsu'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). 27 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Steven Sorenson Diagnostic Radiology · Redlands, CA	106	432
Jeffrey Dym Diagnostic Radiology · Laguna Niguel, CA	96	363
HERREN ENTERPRISES INC	75	235
Navid Jahed Diagnostic Radiology · Mission Viejo, CA	66	229
Jackson Penry Diagnostic Radiology · Mission Viejo, CA	65	255
Mark Garfinkle Internal Medicine · Redding, CA	59	161
Absalom Hepner Cardiology · Mission Viejo, CA	39	136
Sanjay Bhojraj Interventional Cardiology · Murrieta, CA	28	88
Tze Ip Cardiology · Mission Viejo, CA	28	103
Unilab Corporation Clinical Laboratory · West Hills, CA	27	102
Daniel Ponticiello Critical Care (Intensivists) · Mission Viejo, CA	22	45
Raj Patel Emergency Medicine · La Jolla, CA	20	59

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