Andrew C Chang, MD

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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.

• Loma Linda University Medical Center Hospital · Loma Linda, CA
• Riverside University Health System-Medical Center Hospital · Moreno Valley, CA · listed as Riverside University Health Systems - Medical Center

Colleagues at Faculty Physicians and Surgeons of Llusm

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1308 clinicians in the practice; 12 are shown here.

• Dr. Ara Anspikian, MD Psychiatry Physician · Los Angeles, CA
• Jason Y Chen, MD Orthopaedic Surgery Physician · Loma Linda, CA
• Dr. Navpreet Kaur Dhillon, MD Trauma Surgery Physician · Moreno Valley, CA
• Puja Gupta, MD Internal Medicine Physician · Ann Arbor, MI
• Elaine A Hart, MD Obstetrics & Gynecology Physician · Loma Linda, CA
• Miss. Upinder K Jodhka, MD Pediatrics Physician · Loma Linda, CA
• John Lenart, MD Anesthesiology Physician · Loma Linda, CA
• Paul Leonor, MD Gastroenterology Physician · Los Angeles, CA
• Paul D Lui, MD Urology Physician · Loma Linda, CA
• Nitin Ubhayakar, MD Student in an Organized Health Care Education/Training Program · Pasadena, CA
• Mr. Christopher Ray Williams, PA-C Physician Assistant · Fontana, CA
• Dr. Maciej Witkos, MD Emergency Medicine Physician · San Diego, CA

Other providers in Loma Linda

• Dr. Cindy Xinxin Cai, MD, PHD

  Individual Gastroenterology Physician · NPI 1386832871

  11201 Benton St, Loma Linda, CA 92357-2540 · (909) 583-6100

• Dr. Kendrick Minyen Che, DO

  Individual Gastroenterology Physician · NPI 1326251844

  11234 Anderson St, Loma Linda, CA 92354-2804 · (909) 558-8131

• David S. Condon, MD

  Individual Gastroenterology Physician · NPI 1790898799

  11370 Anderson St Ste 3150, Loma Linda, CA 92354-3450 · (909) 558-2191

• Miss. Mahnaz Farahmand, MD

  Individual Gastroenterology Physician · NPI 1063454841

  11234 Anderson St # MC1516A, Loma Linda, CA 92354-2804 · (909) 558-4905

• Dr. Ronald Griffin, MD

  Individual Gastroenterology Physician · NPI 1164516316

  11201 Benton Street Jerry L Pettis Vamc, Loma Linda, CA 92357 · (909) 583-6100