Tony M Chang, MD

2 locations · Cancer Therapy Medical Group Inc · 12 clinicians in this group

Hospitals listed: Dameron Hospital. That is not proof they admit you there this week.

Licence A85797 · Current

Licensed to practise in California · since 2004 · expires 2027-04-30 · George Washington 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 Surgery - Surgery

1 hospital

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

• Dameron HospitalStockton, CAAcute Care Hospital · Voluntary non-profit - Other · Has an emergency departmentPart of Adventist Health, which runs 28 hospitals in 3 statesPatients rate it 2 of 5 · 58% would definitely recommend it
  Overall rating: 2 of 5 starsWorse than the national rate — MRSA Bacteremia: 18.373, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0, Oct 2024 – Sep 2025

$12,581

Medicare paid this office $12,581 for 42 people.

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

Procedures Medicare counted

Who their Medicare patients are

42 Original Medicare patients in 2024. Average age 71 · Women 69% · Also on Medicaid 62% · Health risk score 1.21. At or below the middle of the specialty; the typical general surgery clinician is at 1.69.

Conditions among them: High blood pressure 75% · Diabetes 45% · Cancer 31% · Coronary heart disease 29% · Chronic kidney disease 29%.

The office billed $60,919, Medicare allowed $17,990 and paid $12,581; for 77 services of 25 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.

$2,167 in 2024

Medicaid paid $2,167 for 24 billed services this clinician did in 2024, up to 12 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.

$638

Pharmacies billed $638 in 2024.

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

Opioids were 35% of their Part D prescriptions (15 of 43) in 2024. Too few prescriptions to judge: with under about 50 a year, a handful of patients can swing this share.

43 generic and 0 brand-name prescriptions · $638 in drug cost · 16 antibiotic prescriptions.

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.

$45 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.

Medicare did not publish checkup rates for this clinician.

NPI

1164445896

Licence

CA A85797California A85797: Current · expires 2027-04-30

Trained

George Washington University School of Medicine, 2001 · 25 years ago

Group

Cancer Therapy Medical Group Inc

Gender

Male