Quick answers
- Which hospitals does Warner Peng work at?
- Medicare's official clinician data lists Warner Peng at 2 hospitals: Community Memorial Hospital - Ventura and St Johns Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Warner Peng see patients?
- Medicare's clinician data lists 1 practice location in Oxnard, CA. Call before your visit to confirm the address.
- What is Warner Peng's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Warner Peng accept Medicare assignment?
- Yes. Medicare's clinician data says Warner Peng 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 Warner Peng offer telehealth?
- Medicare's clinician data says Warner Peng offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Warner Peng?
- (805) 485-7232, as listed in official Medicare / NPI Registry data.
- What is Warner Peng's NPI number?
- 1154584704. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Warner Peng works
Medicare's Facility Affiliation Data lists Warner Peng at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Community Memorial Hospital - VenturaVentura, CA · Acute Care Hospital · CCN 050394
- St Johns Regional Medical CenterOxnard, CA · Acute Care Hospital · CCN 050082
Practice locations
Addresses where Warner Peng is enrolled with Medicare (CMS data updated 2026-10-02).
- 1851 Lombard St, Suite 105Oxnard, CA 93030 (805) 485‑7232
Group practices
Medicare enrollment lists Warner Peng as a member of this group (CMS data updated 2026-10-02).
- Austin J Ma MD a Professional Corporation11 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Kansas School Of Med (kc/wich/sal) |
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1154584704 |
| 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