Keith Thompson, MD

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.

Colleagues at Southern California Permanente Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 11242 clinicians in the practice; 12 are shown here.

• Andy Chen, MD Internal Medicine Physician · Abington, PA
• Linda Ann Hou, MD Gastroenterology Physician · Torrance, CA
• Jennifer Ann Jessen, NP Nurse Practitioner · Orange, CA
• Dr. Albert Lai, MD Pediatrics Physician · San Diego, CA
• Dr. David L-C Lau, MD Vascular Surgery Physician · Bellflower, CA
• Dr. Omar Saif Mapara, MD Internal Medicine Physician · Newark, CA
• Gerard Kim Nguyen, MD Diagnostic Radiology Physician · Newport Beach, CA
• Dr. Jacquelyn Yen Nguyen, MD Internal Medicine Physician · Los Angeles, CA
• Dr. John Pang, MD Internal Medicine Physician · Ventura, CA
• Dr. Dinesh K Patel, MD Critical Care Medicine (Internal Medicine) Physician · Fountain Valley, CA
• Dr. Kamesiau Damara Premmer, MD Anesthesiology Physician · Corona, CA
• Dr. Seksan Srephichit, MD Anesthesiology Physician · Garden Grove, CA

Other providers in Fontana

• Dr. Paymon Mesgarzadeh, MD

  Individual Cardiovascular Disease Physician · NPI 1023216892

  9985 Sierra Ave, Fontana, CA 92335-6720 · (909) 427-5000

• Dr. William James Mosley II, MD

  Individual Cardiovascular Disease Physician · NPI 1518114370

  9985 Sierra Ave, Fontana, CA 92335-6720 · (909) 427-5000

• James R. Orens, MD

  Individual Cardiovascular Disease Physician · NPI 1912078809

  9961 Sierra Ave, Fontana, CA 92335-6720 · (909) 427-3910

• Riteshkumar B Patel, MD

  Individual Cardiovascular Disease Physician · NPI 1598993156

  9961 Sierra Ave, Fontana, CA 92335-6720 · (714) 348-9661