Joselyn Diaz, PA-C
Physician Assistant · Los Angeles, CA
Joselyn Diaz, PA-C is a physician assistant with a practice address in Los Angeles, California, and NPI 1508498148, issued on Feb 11, 2020. Check the license (California 58303, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Joselyn Diaz
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 58303 CA
Self-reported in NPPES; status is on the state search - Practice location
- 808 W 58TH St, Los Angeles, CA 90037
- Phone
- (323) 541-1411
- Enumerated
- Feb 11, 2020
- Record last updated
- Oct 15, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210622002518); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 808 W 58TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Drew Ales-Pichugin, NPNurse Practitioner1932957826
- Heather AlexanderCounselor1295434322
- Ashley AlvarezNurse Practitioner1558005116
- Justin Amador, FNPFamily Nurse Practitioner1760772321
- Ivan AndradeMarriage & Family Therapist1811586894
- Zoe ArmasFamily Nurse Practitioner1316459274
Verify Joselyn Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 58303Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% fewer Medicare Part D claims than the average physician assistant in 2024
635 Medicare Part D claims for 77 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Metformin Hcl61 claims
- Atorvastatin Calcium54 claims
- Amlodipine Besylate39 claims
- Glipizide31 claims
- Losartan Potassium29 claims
- Hydrochlorothiazide24 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
- St. John's Community HealthCompton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joselyn Diaz among 14,451 physician assistant records in California
Joselyn Diaz, 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 updated2020 · 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).
935 physician assistant records list a practice address in Los Angeles
They are 935 of the 69,537 NPPES records with a practice address in Los Angeles, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Los Angeles → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Janae Floyd, PALos Angeles, CA 900371699071571
- Diane Garcia, PA-CLos Angeles, CA 900371427292911
- Adrienne Hurley, PALos Angeles, CA 900371356457550
- Lakesha Johnson, P.A.-CLos Angeles, CA 900371639348261
- Felicia Kuo, PA-CLos Angeles, CA 900371093065088
- Christine LevinLos Angeles, CA 900371508268996
- Hilla Moaddel, PA-CLos Angeles, CA 900371255700423
- Stephen Neal, PA-CLos Angeles, CA 900371659628378
Common questions
What is Joselyn Diaz, PA-C's NPI number?
Joselyn Diaz, PA-C's National Provider Identifier (NPI) is 1508498148, issued on Feb 11, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Joselyn Diaz, PA-C located?
The NPPES record lists a practice address at 808 W 58TH St, Los Angeles, CA, 90037. Phone: (323) 541-1411. Providers update this record themselves, so call before visiting.
How can I verify Joselyn Diaz, PA-C's license?
NPPES lists California license number 58303, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Joselyn Diaz, PA-C prescribe under Medicare Part D?
In 2024, Joselyn Diaz, PA-C had 635 Medicare Part D claims for 77 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.