Courtley Yan, PA-C
Physician Assistant · Glendora, CA
Courtley Yan, PA-C is a physician assistant with a practice address in Glendora, California, and NPI 1205435583, issued on Oct 19, 2020. Check the license (California 58550, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Courtley Yan
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 58550 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2025 E Route 66, Glendora, CA 91740
- Phone
- (626) 334-4610
- Enumerated
- Oct 19, 2020
- Record last updated
- Jan 15, 2026
- Medicare enrollment
- Enrolled (PECOS I20201026001295); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 2025 E Route 66
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rosemary Castillo, NPNurse Practitioner1891854519
- Ihsan Hakimeh, MDInternal Medicine Physician1407805153
Verify Courtley Yan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 58550Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average physician assistant in 2024
755 Medicare Part D claims for 309 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate43 claims
- Atorvastatin Calcium39 claims
- Metformin Hcl38 claims
- Gabapentin31 claims
- Prednisone31 claims
- Albuterol Sulfate Hfa30 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.
Bills Medicare through one group practice
- Healthcare Partners Affiliates Medical GroupGlendora, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Courtley Yan among 14,451 physician assistant records in California
Courtley Yan, PA-C is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 62% of them.
- NPI issued2020 · 62% of these records are older, 33% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2020 · median 2018 among the 7,214 with a school on file
- Record last updated2026 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 physician assistant records list a practice address in Glendora
They are 21 of the 921 NPPES records with a practice address in Glendora, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Glendora → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- David Abovian, PAGlendora, CA 917401326349960
- Gloria Chen, PA-CGlendora, CA 917401760704258
- Maggie ChenGlendora, CA 917401700476835
- Amanda Duncan, PA-CGlendora, CA 917401346672680
- Timothy Hong, PA-CGlendora, CA 917401710766621
- David Kim, PA-CGlendora, CA 917401922035948
- Ashlene Korcek, PA-CGlendora, CA 917401275886715
- Tiffany KupferGlendora, CA 917401023614922
Common questions
What is Courtley Yan, PA-C's NPI number?
Courtley Yan, PA-C's National Provider Identifier (NPI) is 1205435583, issued on Oct 19, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Courtley Yan, PA-C located?
The NPPES record lists a practice address at 2025 E Route 66, Glendora, CA, 91740. Phone: (626) 334-4610. Providers update this record themselves, so call before visiting.
How can I verify Courtley Yan, PA-C's license?
NPPES lists California license number 58550, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Courtley Yan, PA-C prescribe under Medicare Part D?
In 2024, Courtley Yan, PA-C had 755 Medicare Part D claims for 309 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
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.