Joselyn Diaz, PA-C
NPI 1508498148 · Physician Assistant · Los Angeles, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joselyn Diaz, PA-C is a Physician Assistant provider in Los Angeles, CA (NPI 1508498148).
Provider details
- NPI number
- 1508498148
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 58303 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
16 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Blood Glucose (sugar) Level82947 | 16 | $4 |
Typical Medicare-allowed amounts for these services range $4–$4 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metformin Hcl | 61 | 19 |
| Atorvastatin Calcium | 54 | 20 |
| Amlodipine Besylate | 39 | 15 |
| Glipizide | 31 | 12 |
| Losartan Potassium | 29 | 11 |
| Hydrochlorothiazide | 24 | — |
| Lisinopril | 22 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-02-11
- Last updated
- 2020-10-15
- Certified
- 2020-10-15
Frequently asked questions
- What is Joselyn Diaz's NPI number?
- Joselyn Diaz's National Provider Identifier (NPI) is 1508498148, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joselyn Diaz's specialty?
- Joselyn Diaz is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Joselyn Diaz located?
- Joselyn Diaz's practice location on file with NPPES is 808 W 58th St, Los Angeles, CA 90037-3632.
- What is Joselyn Diaz's phone number?
- The practice phone number listed in the NPPES registry for Joselyn Diaz is (323) 541-1411.
- Does Joselyn Diaz accept Medicare?
- Joselyn Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joselyn Diaz's NPI active?
- Yes — Joselyn Diaz's NPI (1508498148) is active in the NPPES registry as of the last update on 2020-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.