Anders Davidson, 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. Those with a page here are linked.

• University Of California Davis Medical Center Hospital · Sacramento, CA · listed as University of California, Davis Medical Center
• Providence Santa Rosa Memorial Hospital Hospital · Santa Rosa, CA

Colleagues at Providence Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1465 clinicians in the practice; 12 are shown here.

• Raed Ali, MD Orthopaedic Surgery Physician · Irvine, CA
• Eric Jason Bell, PA-C Physician Assistant · Santa Rosa, CA
• Charles R Brandsmeier, APNP Nurse Practitioner · Mill Valley, CA
• Dr. Carrie Charlton, MD Emergency Medicine Physician · Loma Linda, CA
• Dr. Joyce Hilma Colton House, MD Otolaryngology Physician · Napa, CA
• Janis D Fee, MD Specialist · Orange, CA
• Keith Chunyen Hsu, MD Hospitalist Physician · Mission Viejo, CA
• Virany Margaret Kreng, MD Family Medicine Physician · Orange, CA
• Haichi Steven Lin, MD Internal Medicine Physician · Apple Valley, CA
• Tammy Eileen Lo, MMS, PA-C Physician Assistant · Fullerton, CA
• Trang Doan-Minh Phan, PA-C Physician Assistant · Brea, CA
• Dwayne Yee, FNP-BC Family Nurse Practitioner · Clearlake, CA

Other providers in Travis AFB

• Dr. Gregory Scott Brittenham Jr., DO

  Individual Vascular Surgery Physician · NPI 1316400609

  101 Bodin Cir, Travis AFB, CA 94535-1809 · (707) 423-3000

• Dr. Connor Caples, MD

  Individual Vascular Surgery Physician · NPI 1700266731

  101 Bodin Cir, Travis AFB, CA 94535-1809 · (707) 423-5036

• Shaun Michael Gifford, MD

  Individual Vascular Surgery Physician · NPI 1558576918

  101 Bodin Cir, Travis AFB, CA 94535-1809 · (707) 423-5215

• Dr. Thomas Anthony Heafner, MD

  Individual Vascular Surgery Physician · NPI 1396030102

  60 MDG/60 Sgcs/sgch 101 Bodin Cir, Travis AFB, CA 94535 · (314) 691-1352

• Dr. Gina Marie Sisti, MD

  Individual Vascular Surgery Physician · NPI 1659831964

  60 Mdg / Sgcs 101 Bodin Cir, Travis AFB, CA 94535-1809 · (707) 423-2300