Quick answers
- Which hospitals does Mark A. Cooper Jr. work at?
- Medicare's official clinician data lists Mark A. Cooper Jr. at 4 hospitals: Northridge Hospital Medical Center, Palmdale Regional Medical Center, Providence Cedars Sinai Tarzana Medical Center and Sherman Oaks Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark A. Cooper Jr. see patients?
- Medicare's clinician data lists 2 practice locations, including Palmdale, CA and Sherman Oaks, CA. Call before your visit to confirm the address.
- What is Mark A. Cooper Jr.'s specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Mark A. Cooper Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Mark A. Cooper Jr. 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 Mark A. Cooper Jr.'s NPI number?
- 1336894914. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark A. Cooper Jr. works
Medicare's Facility Affiliation Data lists Mark A. Cooper Jr. at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northridge Hospital Medical CenterNorthridge, CA · Acute Care Hospital · CCN 050116
- Palmdale Regional Medical CenterPalmdale, CA · Acute Care Hospital · CCN 050204
- Providence Cedars Sinai Tarzana Medical CenterTarzana, CA · Acute Care Hospital · CCN 050761
- Sherman Oaks HospitalSherman Oaks, CA · Acute Care Hospital · CCN 050755
Practice locations
Addresses where Mark A. Cooper Jr. is enrolled with Medicare (CMS data updated 2026-10-02).
- 38660 Medical Ctr DrPalmdale, CA 93551
- 4955 Van Nuys Blvd, Suite 615Sherman Oaks, CA 91403
Group practices
Medicare enrollment lists Mark A. Cooper Jr. as a member of this group (CMS data updated 2026-10-02).
- Domenick J Sisto M D Inc10 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Palmdale
Clinicians with the same Medicare primary specialty in Palmdale, CA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336894914 |
| 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