Dr. Vincent Louie Ramos Mendiola, 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. Those with a page here are linked.

• Adventist Health Simi Valley Hospital · Simi Valley, CA · listed as Simi Valley Hospital & Health Care Services
• Henry Mayo Newhall Hospital Hospital · Valencia, CA · listed as Henry Mayo Newhall Memorial Hospital
• Ridgecrest Regional Hospital Hospital · Ridgecrest, CA
• Providence Holy Cross Medical Center Hospital · Mission Hills, CA

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

Colleagues at City of Hope Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 959 clinicians in the practice; 12 are shown here.

• Dr. Sarkis Baltayian, MD Anesthesiology Physician · Duarte, CA
• Dr. Mike Y Chen, MD Neurological Surgery Physician · Arcadia, CA
• Brittany Nicole Duvall, NP Family Nurse Practitioner · Duarte, CA
• Dr. Stephen Bernard Gruber, MD Medical Oncology Physician · Duarte, CA
• Ileana Izquierdo, CRNA Certified Registered Nurse Anesthetist · Duarte, CA
• Dr. Robert Jenq, MD Hematology & Oncology Physician · Duarte, CA
• Dr. Kevin McDonnell, MD Internal Medicine Physician · Duarte, CA
• Dr. Daniel Sangwon Oh, MD Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Irvine, CA
• Dr. Christina M. Poloni, DO Surgery Physician · Duarte, CA
• Chona Ray, NP Hematology & Oncology Physician · Long Beach, CA
• Dr. Karen G.m. Sokolov, MD Radiation Oncology Physician · Burbank, CA
• Dr. Lihong Wu, MD Hematology & Oncology Physician · Long Beach, CA

Other providers in Santa Clarita

• Alexander C Black, MD

  Individual Hematology & Oncology Physician · NPI 1104851500

  27235 Tourney Rd Ste 2400, Santa Clarita, CA 91355-5905 · (661) 255-5350

• Katherine Mary Cohen, FNP-C

  Individual Hematology & Oncology Physician · NPI 1043753650

  27235 Tourney Rd Ste 2400, Santa Clarita, CA 91355-5905 · (661) 255-9287

• George Hajjar, MD

  Individual Hematology & Oncology Physician · NPI 1619978715

  23823 Valencia Blvd Ste 250, Santa Clarita, CA 91355-9512 · (661) 799-1999

• Dr. Siddharth Kunte, MD

  Individual Hematology & Oncology Physician · NPI 1639585870

  25425 Orchard Village Rd Ste 150, Santa Clarita, CA 91355-2959 · (323) 760-9757