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Treesa Williamson, CRNP

NPI 1598159824ActiveIndividual· Nurse Practitioner, Psych/Mental Health· San Francisco, CA

Nurse Practitioner, Psych/Mental Health (CRNP) with Brightside Medical PC, practicing in San Francisco, California. Part D covered 74 prescriptions written in 2024, 100% of them generic.

Overview

NPI1598159824
StatusActive
Entity typeIndividual
CredentialCRNP
Sole proprietorNo
NPI issuedMar 25, 2015
Last updated in NPPESNov 5, 2026
Certified by providerNov 5, 2026

Specialties and licenses

TaxonomyCodeLicenseState
Nurse Practitioner, Psych/Mental Health Primary363LP0808XSP026787PA
Nurse Practitioner, Psych/Mental Health363LP0808X12.013004CT
Nurse Practitioner363L00000XSP014874PA
Nurse Practitioner, Psych/Mental Health363LP0808XTPAN633FL

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 - Nurse Practitioner (PA)

Part D prescriptions in 2024

Prescriptions (claims)74 · 104 30-day fills
Patients26
Total drug cost$1,067
Generic share100% of claims

Medicare sources and data years

Education and affiliations

Graduation year2014
Medicare specialtyNurse Practitioner

Medical group

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 psychiatric nurse practitioners in San Francisco

All 194 psychiatric nurse practitioners in San Francisco · All psychiatric nurse practitioners in California