Quick answers
- Where does John A. Davis see patients?
- Medicare's clinician data lists 1 practice location in Grand Terrace, CA. Call before your visit to confirm the address.
- What is John A. Davis's specialty?
- Medicare lists Clinical Psychologist as the primary specialty.
- Does John A. Davis accept Medicare assignment?
- Yes. Medicare's clinician data says John A. Davis 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 A. Davis?
- (909) 864-1097, as listed in official Medicare / NPI Registry data.
- What is John A. Davis's NPI number?
- 1083728513. 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 A. Davis is enrolled with Medicare (CMS data updated 2026-10-02).
- 11980 Mount Vernon AveGrand Terrace, CA 92313 (909) 864‑1097
Group practices
Medicare enrollment lists John A. Davis as a member of this group (CMS data updated 2026-10-02).
- Riverside-San Bernardino County Indian Health Inc46 clinicians in the group
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | CP |
|---|---|
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1083728513 |
| 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