Ian Churchhill Anderson, MD

5 locations · Providence Medical Foundation · 1,461 clinicians in this group

Hospitals listed: Adventist Health Mendocino Coast · Healdsburg Hospital · Petaluma Valley Hospital · Providence Santa Rosa Memorial Hospital · Sonoma Valley Hospital. That is not proof they admit you there this week.

3 plans · 1 carrier

Licence A49481 · Current

Licensed to practise in California · since 2000 · expires 2027-11-30 · Duke University School of Medicine.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

What this clinician told their state board, medical school and everything before it. Only some states publish this, so nothing here means the state does not say, not that there was no training or certification.

Specialty certification

• American Board of Internal Medicine - Medical Oncology

5 hospitals

These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.

• Adventist Health Mendocino CoastFort Bragg, CACritical Access Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Adventist Health, which runs 28 hospitals in 3 statesPatients rate it 5 of 5 · 80% would definitely recommend it
  Overall rating: 3 of 5 starsNo measure marked better or worse than the national rate
• Healdsburg HospitalHealdsburg, CACritical Access Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Providence, which runs 54 hospitals in 7 states77% would definitely recommend it
  No overall ratingNo measure marked better or worse than the national rate
• Petaluma Valley HospitalPetaluma, CAAcute Care Hospital · Voluntary non-profit - Other · No emergency department · Birthing-friendlyPart of Providence, which runs 54 hospitals in 7 statesPatients rate it 3 of 5 · 70% would definitely recommend it
  Overall rating: 4 of 5 starsNo measure marked better or worse than the national rate
• Providence Santa Rosa Memorial HospitalSanta Rosa, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Providence, which runs 54 hospitals in 7 statesPatients rate it 3 of 5 · 69% would definitely recommend it
  Overall rating: 3 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.375, Oct 2024 – Sep 2025
• Sonoma Valley HospitalSonoma, CAAcute Care Hospital · Government - Hospital District or Authority · Has an emergency departmentPatients rate it 4 of 5 · 79% would definitely recommend it
  Overall rating: 2 of 5 starsNo measure marked better or worse than the national rate

$195,376

Medicare paid this office $195,376 for 630 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

Who their Medicare patients are

630 Original Medicare patients in 2024. Average age 76 · Under 65 5% · 85 and older 15% · Women 61% · Also on Medicaid 16% · Health risk score 2.14. Above the middle of the specialty; the typical hematology-oncology clinician is at 2.04.

Conditions among them: High blood pressure 65% · Cancer 56% · Coronary heart disease 27% · Atrial fibrillation 25% · Chronic kidney disease 24% · Diabetes 23% · Depression 22% · Heart failure 20% · COPD 19% · Stroke 10% · Dementia 6%.

The office billed $827,538, Medicare allowed $263,400 and paid $195,376; for 1,963 services of 17 kinds.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

$13,069 in 2024

Medicaid paid $13,069 for 340 billed services this clinician did in 2024, up to 35 people in a month for one service.

Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.

$5,747,660

Pharmacies billed $5,747,660 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

Opioids were 8% of their Part D prescriptions (152 of 2,030) in 2024. Above the middle of the specialty; the typical hematology-oncology clinician is at 5%. Long-acting opioids: 11% of their opioid prescriptions.

1,557 generic and fewer than 11 brand-name prescriptions · $5,747,660 in drug cost · 31 antibiotic prescriptions to 22 people · 37 antipsychotic prescriptions to people over 65.

Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.

Year by year

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

$778 in 2025

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.