NPI Lens

Robert R. Williams, M.D.

NPI 1184682254ActiveIndividual· Internal Medicine· Tracy, CA

Internal Medicine (M.D.) in Tracy, California, licensed in CA, with an NPI issued in May 2006. Part D covered 135 prescriptions written in 2024, 96% of them generic. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.

Overview

NPI1184682254
StatusActive
Entity typeIndividual
CredentialM.D.
Sole proprietorNo
NPI issuedMay 1, 2006
Last updated in NPPESFeb 25, 2011

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine Primary207R00000XG62642CA
Pediatrics208000000XG62642CA

About license numbers in NPPES

Exclusion screening

Possible match: verify before acting. The OIG list has a record with the same name in California, but that record carries no NPI, so it may be a different person or business.

Matched byName on OIG listExclusion typeExcluded sinceLocation
Name + stateRobert Earl Williams · Recruiter/Capper1128a3Dec 18, 2025Jamestown, CA
ListResultDetails
HHS-OIG LEIE · Nov 10, 2026Possible (name)See above
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 - Pediatric Medicine (CA)

Part D prescriptions in 2024

Prescriptions (claims)135 · 304 30-day fills
Patients42
Total drug cost$2,016
Generic share96% of claims

Medicare sources and data years

Industry payments (Open Payments)

None reported for 2025 or 2024.

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

Other internal medicine physicians in Tracy

All 34 internal medicine physicians in Tracy · All internal medicine physicians in California