Dr. Gansevoort Hurlbut Dunnington Jr., 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.

• Adventist Health Clearlake Hospital · Clearlake, CA · listed as Adventist Health Clearlake Hospital Inc
• Adventist Health St Helena Hospital · Saint Helena, CA · listed as Adventist Health St Helena OB/GYN
• Sequoia Hospital Hospital · Redwood City, CA
• Adventist Health Ukiah Valley Hospital · Ukiah, CA
• Providence Santa Rosa Memorial Hospital Hospital · Santa Rosa, CA
• Adventist Health Home Care Services Home health agency · Lower Lake, CA

Colleagues at Dignity Health Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1204 clinicians in the practice; 12 are shown here.

• Chirdeep Bhutani, MD Nuclear Radiology Physician · Sacramento, CA
• Mr. Grainger Brown, LMFT Marriage & Family Therapist · Sacramento, CA
• Dr. Angelina Marie Crans Yoon, MD Internal Medicine Physician · Woodland, CA
• Mr. Thomas Marx DO, MD Internal Medicine Physician · Sacramento, CA
• Fred Farhad Ghodsi, MA, LMFT Marriage & Family Therapist · Sacramento, CA
• Dr. Kimberly A Guenther, DO Family Medicine Physician · Carmichael, CA
• Dr. Rana Mahfooz Ali Khan, MD Internal Medicine Physician · Sacramento, CA
• Timothy Y. Lee, MD Cardiovascular Disease Physician · Carmichael, CA
• Daniel S Mallamo, PA Orthopaedic Surgery Physician · Redding, CA
• Mei Qiang, MD Hospitalist Physician · Carmichael, CA
• Kuldip Sandhu, MD Gastroenterology Physician · Carmichael, CA
• Johnathan Wei Zhang, MD Student in an Organized Health Care Education/Training Program · Sacramento, CA

Other providers in Saint Helena

• Dr. Swaminadhan Gnanashanmugam, MD

  Individual Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · NPI 1073765517

  10 Woodland Rd, Saint Helena, CA 94574-9554 · (650) 804-8093

• Dr. John Garth Jacobson, MD

  Individual Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · NPI 1528048659

  6 Woodland Rd Ste #101, Saint Helena, CA 94574-9501 · (707) 963-6303

• Armin Kiankhooy, MD

  Individual Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · NPI 1225156482

  6 Woodland Rd Ste 304, Saint Helena, CA 94574-9562 · (707) 963-7200

• Dr. Aaron Maxwell Kime, MD

  Individual Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · NPI 1841635869

  6 Woodland Rd Ste 304, Saint Helena, CA 94574-9562 · (707) 963-7200