Joseph Juyo Chen, M.D.
Ophthalmology Physician · Westlake Village, CA
Joseph Juyo Chen, M.D. is an ophthalmology physician with a practice address in Westlake Village, California, and NPI 1639496953, issued on Apr 26, 2010. Check the license (California A131213, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Juyo Chen
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- A131213 CA
BP20036802 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4353 Park Terrace Dr Ste 150, Westlake Village, CA 91361
- Phone
- (805) 987-5300
- Enumerated
- Apr 26, 2010
- Record last updated
- Jul 10, 2023
- Medicare enrollment
- Enrolled (PECOS I20140910002491); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 4353 Park Terrace Dr Ste 150
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Adam Abroms, MDOphthalmology Physician1497743702
- Alique Boulgourjian, ODOptometrist1891569356
- Lynn Huang, MD, MPHOphthalmology Physician1689808438
- Matthew Johnson, MDOphthalmology Physician1356967863
- Shalini Kapoor, M.D.Ophthalmology Physician1932206224
- Anh Le, OPTOMETRISTOptometrist1922158872
Verify Joseph Juyo Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A131213Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average ophthalmology physician in 2024
3,673 Medicare Part D claims for 679 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Latanoprost676 claims
- Dorzolamide-Timolol397 claims
- Prednisolone Acetate359 claims
- Timolol Maleate331 claims
- Brimonidine Tartrate224 claims
- Lumigan219 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 7.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,470.60
63 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Paul J Dougherty M D IncWestlake Village, CA
- Santa Barbara Eyecare Inc A Professional Medical CorporationSanta Barbara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Juyo Chen among 2,899 ophthalmology physician records in California
Joseph Juyo Chen, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 74% of them.
- NPI issued2010 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2009 · median 2001 among the 1,907 with a school on file
- Record last updated2023 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 ophthalmology physician records list a practice address in Westlake Village
They are 11 of the 1,397 NPPES records with a practice address in Westlake Village, and 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Westlake Village → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Adam Abroms, MDWestlake Village, CA 913611497743702
- Steven Corwin, MDThousand Oaks, CA 913611720089964
- Paul Dougherty, M.D.Westlake Village, CA 913611083744775
- Daniel Ebroon, M.D.Thousand Oaks, CA 913611023050655
- George Hoffman, MDWestlake Village, CA 913611689869356
- Lynn Huang, MD, MPHWestlake Village, CA 913611689808438
- Shalini Kapoor, M.D.Westlake Village, CA 913611932206224
- Rajesh Khanna, M.DWestlake Village, CA 913611104854249
Common questions
What is Joseph Juyo Chen, M.D.'s NPI number?
Joseph Juyo Chen, M.D.'s National Provider Identifier (NPI) is 1639496953, issued on Apr 26, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Juyo Chen, M.D. located?
The NPPES record lists a practice address at 4353 Park Terrace Dr Ste 150, Westlake Village, CA, 91361. Phone: (805) 987-5300. Providers update this record themselves, so call before visiting.
How can I verify Joseph Juyo Chen, M.D.'s license?
NPPES lists California license number A131213, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joseph Juyo Chen, M.D. prescribe under Medicare Part D?
In 2024, Joseph Juyo Chen, M.D. had 3,673 Medicare Part D claims for 679 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Joseph Juyo Chen, M.D.'s MIPS final score?
The 2023 MIPS final score is 7.9 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.