Quick answers
- Which hospitals does Atef Mousa work at?
- Medicare's official clinician data lists Atef Mousa at 3 hospitals: Antelope Valley Hospital, Palmdale Regional Medical Center and Ridgecrest Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Atef Mousa see patients?
- Medicare's clinician data lists 2 practice locations, including Lancaster, CA. Call before your visit to confirm the address.
- What is Atef Mousa's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Atef Mousa accept Medicare assignment?
- Yes. Medicare's clinician data says Atef Mousa 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.
- Does Atef Mousa offer telehealth?
- Medicare's clinician data says Atef Mousa offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Atef Mousa?
- (661) 948-4429, as listed in official Medicare / NPI Registry data.
- What is Atef Mousa's NPI number?
- 1891006565. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Atef Mousa works
Medicare's Facility Affiliation Data lists Atef Mousa at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Antelope Valley HospitalLancaster, CA · Acute Care Hospital · CCN 050056
- Palmdale Regional Medical CenterPalmdale, CA · Acute Care Hospital · CCN 050204
- Ridgecrest Regional HospitalRidgecrest, CA · Critical Access Hospital · CCN 051333
Practice locations
Addresses where Atef Mousa is enrolled with Medicare (CMS data updated 2026-10-02).
- 44215 15th St W, Suite 103Lancaster, CA 93534 (661) 948‑4429
- 44567 15th St WLancaster, CA 93534 (661) 949‑5524
Group practices
Medicare enrollment lists Atef Mousa as a member of these groups (CMS data updated 2026-10-02).
- Horizon Multicare Group Inc28 clinicians in the group
- Unified Health Associates11 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Lancaster
Clinicians with the same Medicare primary specialty in Lancaster, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1891006565 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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