Quick answers
- Where does Ammar Charestan see patients?
- Medicare's clinician data lists 3 practice locations, including San Bernardino, CA, Escondido, CA and El Cajon, CA. Call before your visit to confirm the address.
- What is Ammar Charestan's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Ammar Charestan accept Medicare assignment?
- Yes. Medicare's clinician data says Ammar Charestan 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 Ammar Charestan?
- (909) 382-7100, as listed in official Medicare / NPI Registry data.
- What is Ammar Charestan's NPI number?
- 1295181543. 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 Ammar Charestan is enrolled with Medicare (CMS data updated 2026-10-02).
- 1454 E 2nd StSan Bernardino, CA 92408 (909) 382‑7100
- 460 N Elm StEscondido, CA 92025 (760) 520‑8100
- 855 E Madison AveEl Cajon, CA 92020 (619) 440‑2751
Group practices
Medicare enrollment lists Ammar Charestan as a member of these groups (CMS data updated 2026-10-02).
- Sac Health System227 clinicians in the group
- Neighborhood Healthcare150 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in San Bernardino
Clinicians with the same Medicare primary specialty in San Bernardino, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1295181543 |
| 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