Marilyn J Tan, MD

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

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

19 plans · 4 carriers

Licence A113366 · Current

Licensed to practise in California · since 2010 · expires 2027-10-31 · Boston 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 - Endocrinology, Diabetes and Metabolism
• American Board of Internal Medicine - Internal Medicine

2 hospitals

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
• Stanford Health Care Tri-ValleyPleasanton, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Stanford Health Care, which runs 3 hospitalsPatients rate it 3 of 5 · 74% would definitely recommend it
  Overall rating: 5 of 5 starsBetter than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.178, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.237, Oct 2024 – Sep 2025

$184,641

Medicare paid this office $184,641 for 429 people.

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

Who their Medicare patients are

429 Original Medicare patients in 2024. Average age 71 · Under 65 14% · 85 and older 8% · Women 50% · Also on Medicaid 34% · Health risk score 2.79. Sicker patients than 9 in 10 peers; the typical endocrinology clinician is at 1.46.

Conditions among them: High blood pressure 75% · Diabetes 75% · Chronic kidney disease 50% · Coronary heart disease 42% · Heart failure 31% · Atrial fibrillation 28% · Depression 27% · Cancer 24% · COPD 21% · Dementia 16% · Stroke 14%.

The office billed $927,043, Medicare allowed $236,926 and paid $184,641; for 2,277 services of 14 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.

$81,010 in 2024

Medicaid paid $81,010 for 1,333 billed services this clinician did in 2024, up to 38 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.

$2,077,907

Pharmacies billed $2,077,907 in 2024.

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

Opioids were 0% of their Part D prescriptions (0 of 2,278) in 2024. At or below the middle of the specialty; the typical endocrinology clinician is at 0%.

795 generic and 1,292 brand-name prescriptions · $2,077,907 in drug cost.

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.

$12,817 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

1770899395

Licence

CA A113366California A113366: Current · expires 2027-10-31

Trained

Boston University School of Medicine, 2009 · 17 years ago

Group

Stanford Health Care

Video visits

Lists video visits

Gender

Female