What is Joseph Chen's specialty?

Joseph Chen (NPI 1639496953) is a Medicare-billing provider whose primary specialty is Ophthalmology in Westlake Village, CA.

Where does Joseph Chen practice?

Joseph Chen practices in Westlake Village, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1639496953.

How much does Medicare pay Joseph Chen?

Joseph Chen (NPI 1639496953) received approximately $354K in total Medicare Part B payments, serving 957 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1639496953

Joseph ChenM.D.

PRACTICEPAUL J DOUGHERTY M D INCSee all providers at this practice →

OphthalmologyWestlake Village, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

2,669

Unique beneficiaries

—

Total services

3,540

Distinct HCPCS

Medicare payment

$301K

Peer benchmark

Total Medicare services vs. 2,144 Ophthalmology providers in CA — above median (cohort median 1,859).

PRESCRIBING · PART D · 2024

Total Rx claims

3,567

Beneficiaries

—

Total drug cost

$511K

Distinct drugs

Brand share

39.4%

Top prescribed drugs

Latanoprost676 claims

Dorzolamide Hcl/Timolol Maleat397 claims

Prednisolone Acetate359 claims

Timolol Maleate331 claims

Brimonidine Tartrate224 claims

QUALITY · MIPS · 2024

Final MIPS score

75.0

Quality

0.0

Cost

73.0

Improvement activities

0.0

Promoting interop.

0.0

Payment adjustment

0.00%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$3K

Payment records

By payment type

Food and Beverage$3K

Top paying entities

Food and Beverage$3K

REFERRAL NETWORK

Where Joseph Chen'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). 8 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Unilab Corporation Clinical Laboratory · West Hills, CA	96	240
COMMUNITY MEMORIAL HEALTH SYSTEM	93	273
DIGNITY HEALTH	21	32
FRAMBACH, DONALD	17	39
John Fang Ophthalmology · Ventura, CA	15	23
DIGNITY HEALTH	13	27
MALOON, STEPHEN	12	74
Pacific Diagnostic Laboratories Clinical Laboratory · Santa Barbara, CA	12	56

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