Quick answers
- Does Steven R. Mason accept Medicare assignment?
- Medicare's clinician data says Steven R. Mason may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Steven R. Mason's NPI number?
- 1811472921. 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 Steven R. Mason is enrolled with Medicare (CMS data updated October 2, 2026).
- 11022 Santa Monica Blvd, Suite 370Los Angeles, CA 90025 (424) 235‑5315
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | CP |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1811472921 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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