Zachary A Gray, MD

2 locations · Stanford Health Care · 3,152 clinicians in this group

Hospitals listed: Stanford Health Care. That is not proof they admit you there this week.

Licence A163938 · Current

Licensed to practise in California · since 2019 · expires 2027-07-31 · New York Medical College.

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 - Internal Medicine

Medicare did not publish checkup rates for this clinician.

1 hospital

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

• Stanford Health CareStanford, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Stanford Health Care, which runs 3 hospitalsHome of Stanford Cancer Institute, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 83% would definitely recommend it
  Overall rating: 5 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 5.31 (4.24 to 6.37) · 8,661 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 14.1 (12.7 to 15.7) · 2,191 cases, Jan 2024 – Dec 2024Better than the national rate — Postoperative respiratory failure rate: 4.08 (1.95 to 6.21) · 5,296 cases, Jul 2022 – Jun 2024Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.317, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.446, Oct 2024 – Sep 2025Better than the national rate — SSI - Colon Surgery: 0.241, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.7 (0.6 to 0.9) · 3,348 cases, Jan 2024 – Dec 2024

$63,844

Medicare paid this office $63,844 for 197 people.

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

Who their Medicare patients are

197 Original Medicare patients in 2024. Average age 75 · Under 65 14% · 85 and older 24% · Women 55% · Also on Medicaid 46% · Health risk score 3.15. Sicker patients than 9 in 10 peers; the typical internal medicine clinician is at 1.76.

Conditions among them: High blood pressure 75% · Chronic kidney disease 58% · Heart failure 54% · Diabetes 51% · Coronary heart disease 50% · Atrial fibrillation 45% · Depression 40% · Dementia 33% · COPD 29% · Cancer 25% · Stroke 17%.

The office billed $280,410, Medicare allowed $80,251 and paid $63,844; for 557 services of 8 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.

$9,530 in 2024

Medicaid paid $9,530 for 271 billed services this clinician did in 2024, up to 20 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.

$23,725

Pharmacies billed $23,725 in 2024.

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

89 generic and 24 brand-name prescriptions · $23,725 in drug cost · 27 antibiotic prescriptions to 14 people.

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.

NPI

1679078620

Licence

CA A163938California A163938: Current · expires 2027-07-31

Trained

New York Medical College, 2018 · 8 years ago

Group

Stanford Health Care

Gender

Male