Silvia Loica-Mersa, MD

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

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

Licence A138111 · Current

Licensed to practise in California · since 2015 · expires 2027-05-31 · University of Southern California Keck 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 - 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 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

$65,797

Medicare paid this office $65,797 for 236 people.

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

Who their Medicare patients are

236 Original Medicare patients in 2024. Average age 77 · Under 65 6% · 85 and older 24% · Women 51% · Also on Medicaid 32% · Health risk score 2.50. Above the middle of the specialty; the typical internal medicine clinician is at 1.76.

Conditions among them: High blood pressure 75% · Chronic kidney disease 60% · Coronary heart disease 53% · Diabetes 45% · Heart failure 42% · Depression 34% · Atrial fibrillation 32% · Dementia 25% · COPD 24% · Cancer 20% · Stroke 19%.

The office billed $276,204, Medicare allowed $83,412 and paid $65,797; for 659 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.

$1,262 in 2024

Medicaid paid $1,262 for 37 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.

$6,354

Pharmacies billed $6,354 in 2024.

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

Opioids were 17% of their Part D prescriptions (20 of 121) in 2024. A higher opioid share than 9 in 10 peers; the typical internal medicine clinician is at 1%.

107 generic and 14 brand-name prescriptions · $6,354 in drug cost · 14 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.

$123 in 2023

A payment is not proof that care is biased.

NPI

1699194001

Licence

CA A138111California A138111: Current · expires 2027-05-31

Group

Stanford Health Care

Gender

Female