PROVIDER PROFILE · NPI 1679675904

Oscar ChienM.D.

Internal MedicineSan Gabriel, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,394

Unique beneficiaries

—

Total services

5,234

Distinct HCPCS

Medicare payment

$385K

Peer benchmark

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

PRESCRIBING · PART D · 2024

Total Rx claims

42,007

Beneficiaries

—

Total drug cost

$7.0M

Distinct drugs

273

Brand share

31.0%

Top prescribed drugs

Atorvastatin Calcium1,782 claims

Losartan Potassium1,463 claims

Amlodipine Besylate1,333 claims

Pantoprazole Sodium1,040 claims

Empagliflozin875 claims

QUALITY · MIPS · 2024

Final MIPS score

75.0

Quality

0.0

Cost

72.1

Improvement activities

0.0

Promoting interop.

0.0

Payment adjustment

0.00%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$27K

Payment records

151

By payment type

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$20K

Food and Beverage$5K

Travel and Lodging$1K

Consulting Fee$1K

REFERRAL NETWORK

Where Oscar Chien'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). 66 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
AHMC SAN GABRIEL VALLEY MEDICAL	135	876
Sun Clinical Laboratories Clinical Laboratory · El Monte, CA	98	370
Greg Yen Cardiology · San Gabriel, CA	70	525
I Kawei Day Pulmonary Disease · Montery Dark, CA	61	595
Wilson Wong Diagnostic Radiology · Arcadia, CA	60	488
Adam Sun Nephrology · Monterey Park, CA	54	617
LIS, LEON	54	528
Unilab Corporation Clinical Laboratory · West Hills, CA	50	165
Jose Tandoc Diagnostic Radiology · Arcadia, CA	48	437
HAPPY HHA, INC.	48	225
AHMC SAN GABRIEL VALLEY MEDICAL	36	145
AG SAN GABRIEL, LLC	32	338

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