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William Reeves Tatomer, MD

NPI 1104862689ActiveIndividual· Psychiatry & Neurology, Psychiatry· San Mateo, CA

Psychiatry & Neurology, Psychiatry (MD) in San Mateo, California, trained at University of Virginia School of Medicine (class of 1971). 44 Medicare patients in 2024, $34,649 paid; nearly all of their 392 Part D prescriptions were generic (98%).

Overview

NPI1104862689
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorYes
NPI issuedJun 21, 2006
Last updated in NPPESApr 16, 2010

Specialties and licenses

TaxonomyCodeLicenseState
Psychiatry & Neurology, Psychiatry Primary2084P0800XC35537CA

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Nov 10, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026No match—
New York OMIG · Nov 11, 2026No match—
Ohio Medicaid · Nov 11, 2026No match—
Pennsylvania Medicheck · Nov 11, 2026No match—
Washington HCA · Nov 11, 2026No match—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)Enrolled Practitioner - Psychiatry (CA)
Accepts assignmentYes (participating)

Medicare services in 2024

Medicare patients44
Services billed556 across 2 procedure codes
Paid by Medicare$34,649

Part D prescriptions in 2024

Prescriptions (claims)392 · 662 30-day fills
Patients38
Total drug cost$9,665
Generic share98% of claims

Medicare sources and data years

Education and affiliations

Medical schoolUniversity of Virginia School of Medicine
Graduation year1971
Medicare specialtyPsychiatry

Source: CMS Care Compare

Industry payments (Open Payments)

None reported for 2025 or 2024.

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

Other psychiatrists in San Mateo

All 102 psychiatrists in San Mateo · All psychiatrists in California