Dr. Warren Chow, MD

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.

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.

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.

• Uci Health-Orange Hospital · Orange, CA

Also affiliated with 1 hospital, which CMS identifies by certification number only.

Colleagues at Uc Regents

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 306 clinicians in the practice; 12 are shown here.

• Byron J Allen, MD Cardiovascular Disease Physician · Orange, CA
• Dr. Rosa Mercedes Andrade, MD Infectious Disease Physician · Orange, CA
• Harkiran Boparai, RD Registered Dietitian · Orange, CA
• Dr. Hoang Tran Le, MD Pulmonary Disease Physician · Fountain Valley, CA
• Bavani Nadeswaran, MD Internal Medicine Physician · Orange, CA
• Crystal Oelrich, NP Adult Health Nurse Practitioner · Los Angeles, CA
• Tapan Pandya, MD Pulmonary Disease Physician · Los Alamitos, CA
• Katarina Veskovic, MD Internal Medicine Physician · Irvine, CA
• Victoria M Villaflor, MD Medical Oncology Physician · Orange, CA
• Anastasia Weiland, MD Infectious Disease Physician · Orange, CA
• Yesim Yilmaz Demirdag, MD Allergy & Immunology Physician · Irvine, CA
• Dr. Elliot Sui Lung Yu, MD Internal Medicine Physician · Orange, CA

Other providers in Orange

• Dr. May Cho, MD

  Individual Internal Medicine Physician · NPI 1619263514

  101 The City Dr S, Orange, CA 92868-3201 · (714) 880-7812

• Divya Chode, MD

  Individual Internal Medicine Physician · NPI 1598040339

  1310 W Stewart Dr Ste 410, Orange, CA 92868-3854 · (714) 639-9401

• Dr. Shenfon Chou, MD

  Individual Internal Medicine Physician · NPI 1437334356

  2041 N Breckenridge St, Orange, CA 92867-2906 · (646) 823-6322

• Dr. Kevin Michael Chow, MD

  Individual Internal Medicine Physician · NPI 1396240206

  101 The City Dr S, Orange, CA 92868-3201 · (714) 456-5726

• Frederick Chua, MD

  Individual Internal Medicine Physician · NPI 1477180701

  101 The City Dr S Ste 400, Orange, CA 92868-3201 · (714) 456-5691

• Jacob Cortez, DO

  Individual Internal Medicine Physician · NPI 1740984707

  1010 W La Veta Ave Ste 750, Orange, CA 92868-4312 · (714) 361-6600

• Craig J Milhouse MD Inc

  Organization Internal Medicine Physician · NPI 1760654297

  1110 E Chapman Ave Ste 101, Orange, CA 92866-2139 · (714) 532-7272

• Ralph W Cygan, MD

  Individual Internal Medicine Physician · NPI 1942219704

  101 The City Dr S, Orange, CA 92868-3201 · (714) 456-8068