What is Oscar Chien's specialty?

Oscar Chien (NPI 1679675904) is a Medicare-billing provider whose primary specialty is Internal Medicine in San Gabriel, CA.

Where does Oscar Chien practice?

Oscar Chien practices in San Gabriel, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1679675904.

How much does Medicare pay Oscar Chien?

Oscar Chien (NPI 1679675904) received approximately $388K in total Medicare Part B payments, serving 681 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

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

Top paying entities

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

Healthparse Signals

Monitor this provider for changes — dated NPI change events