Miguel A. Villalona Calero, 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.

• Caroline Bui Student in an Organized Health Care Education/Training Program · Orange, CA
• Cynthia Lynn Courtney, NP Family Nurse Practitioner · Orange, CA
• Dr. Roxana Ghashghaei, MD Cardiovascular Disease Physician · Laguna Hills, CA
• Dr. Ankmalika Abha Gupta, MD Allergy & Immunology Physician · Irvine, CA
• Jin Kim, MD Cardiovascular Disease Physician · Orange, CA
• Sanjivan Singh Kohli, MD Pulmonary Disease Physician · San Juan Capistrano, CA
• Nellie Niloofar Nafissi, MD Internal Medicine Physician · Orange, CA
• Edward L Nelson, MD Hematology & Oncology Physician · Orange, CA
• Amin Sabet, MD Cardiovascular Disease Physician · Fresno, CA
• Azadeh Salek, MD General Acute Care Hospital · Redondo Beach, CA
• Mr. Mark Samir Salem Gastroenterology Physician · Orange, CA
• Dr. Sahar Shahidi, PHYSICALTHERAPIST Physical Therapist · Mission Viejo, CA

Other providers in Orange

• Julie Smith, NP

  Individual Hematology & Oncology Physician · NPI 1083137947

  101 The City Dr S Bldg 23, Orange, CA 92868-3201 · (714) 456-8000

• Kellie D Spector, MD

  Individual Hematology & Oncology Physician · NPI 1700374469

  363 S Main St # 485, Orange, CA 92868-3813 · (714) 835-4800

• Uc Regents

  Organization Hematology & Oncology Physician · NPI 1356399380

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

• Poorva Vaidya

  Individual Hematology & Oncology Physician · NPI 1407387566

  101 The City Dr S, Orange, CA 92868-3298 · (714) 456-8000

• John Wong, MD

  Individual Hematology & Oncology Physician · NPI 1336436500

  1010 W La Veta Ave Ste 670, Orange, CA 92868-4306 · (562) 725-4367

• Omid Yazdanpanah, MD

  Individual Hematology & Oncology Physician · NPI 1235792581

  101 The City Dr S, Orange, CA 92868-3201 · (714) 456-8000

• Jason Zell, DO

  Individual Hematology & Oncology Physician · NPI 1568666014

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

• Dr. Shannon Shueyin Zhang, MD

  Individual Hematology & Oncology Physician · NPI 1871120162

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