Quick answers
- Which hospitals does Andrew Ma work at?
- Medicare's official clinician data lists Andrew Ma at 2 hospitals: Adventist Health Simi Valley and Los Robles Hospital & Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Andrew Ma see patients?
- Medicare's clinician data lists 1 practice location in Thousand Oaks, CA. Call before your visit to confirm the address.
- What is Andrew Ma's specialty?
- Medicare lists Infectious Disease as the primary specialty, and also Internal Medicine.
- Does Andrew Ma accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew Ma 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 Andrew Ma offer telehealth?
- Medicare's clinician data says Andrew Ma offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Andrew Ma?
- (805) 495-1073, as listed in official Medicare / NPI Registry data.
- What is Andrew Ma's NPI number?
- 1528299708. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Andrew Ma works
Medicare's Facility Affiliation Data lists Andrew Ma at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health Simi ValleySimi Valley, CA · Acute Care Hospital · CCN 050236
- Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · CCN 050549
Practice locations
Addresses where Andrew Ma is enrolled with Medicare (CMS data updated 2026-10-02).
- 2220 Lynn Rd, Suite 301Thousand Oaks, CA 91360 (805) 495‑1073
Group practices
Medicare enrollment lists Andrew Ma as a member of this group (CMS data updated 2026-10-02).
- Mark H Mazur MD and Barry Statner MD a Professional Corporation15 clinicians in the group
Specialties
- Infectious Diseaseprimary
- Internal Medicinealso
Other infectious disease doctors in Thousand Oaks
Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1528299708 |
| 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