Quick answers
- Where does John J. Ray see patients?
- Medicare's clinician data lists 4 practice locations, including Los Angeles, CA, Simi Valley, CA and Westlake Village, CA. Call before your visit to confirm the address.
- What is John J. Ray's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does John J. Ray accept Medicare assignment?
- Yes. Medicare's clinician data says John J. Ray accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John J. Ray?
- (310) 443-8999, as listed in official Medicare / NPI Registry data.
- What is John J. Ray's NPI number?
- 1619042447. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John J. Ray is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 UCLA Medical Plz, Suite 460Los Angeles, CA 90024 (310) 443‑8999
- 2655 1st St, Suite 300Simi Valley, CA 93065 (805) 578‑8550
- 30870 Russell Ranch Rd, Suite 330Westlake Village, CA 91362 (805) 497‑7015
- 757 Westwood PlzLos Angeles, CA 90095 (310) 825‑9111
Group practices
Medicare enrollment lists John J. Ray as a member of this group (CMS data updated 2026-10-02).
- Regents of the University of California140 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619042447 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians