Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Warner Peng, MD

Individual provider Hematology & Oncology Physician · NPI 1154584704

Warner Peng, MD practises Hematology/Oncology in Oxnard, California. Graduated from University of Kansas School of Med (KC/WICH/SAL) in 2008, 18 years ago. Practices with Austin J MA MD a Professional Corporation, a 12-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
18
Trained at
University of Kansas School of Med (KC/WICH/SAL)
Licensed in
CA
In the registry since
2008
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1851 Lombard St Ste 105
Oxnard, CA 93030-8231
Phone: (805) 485-7232
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence C167982 (CA)

Record details

NPI number1154584704
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 3, 2008
Last updated in NPPESDecember 23, 2021
Certification dateDecember 23, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolUNIVERSITY OF KANSAS SCHOOL OF MED (KC/WICH/SAL)
Graduated 2008 (18 years in practice)
Group practice Austin J Ma Md A Professional Corporation — 12 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients43
Services billed 665 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $4,749 204 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • St Johns Regional Medical Center Hospital · Oxnard, CA · listed as St Johns Regional Imaging Center LLC
  • Community Memorial Hospital - Ventura Hospital · Ventura, CA

Colleagues at Austin J MA MD a Professional Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Oxnard