Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Conor T. Williams, MD

Works at hospitals in Gallup, NM · South San Francisco, CA · Crescent City, CA · New Mexico, California

Summary

Conor T. Williams, MD (Internal Medicine) is listed by Medicare at 3 hospitals in Gallup, NM, South San Francisco, CA and Crescent City, CA. NPI 1952927667. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Conor T. Williams, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Internal MedicinePrimary specialty
YesAccepts Medicare assignment
6Years since medical school (graduated 2020)
MaleGender (as listed)
Permanente Medical Group IncGroup practice (+2 more)

Quick answers

Which hospitals does Conor T. Williams work at?
Medicare's official clinician data lists Conor T. Williams at 3 hospitals: Gallup Indian Medical Center, Kaiser Foundation Hospital - South San Francisco and Sutter Coast Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Conor T. Williams see patients?
Medicare's clinician data lists 4 practice locations, including South San Francisco, CA, Gallup, NM and Crescent City, CA. Call before your visit to confirm the address.
What is Conor T. Williams's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Conor T. Williams accept Medicare assignment?
Yes. Medicare's clinician data says Conor T. Williams accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Conor T. Williams?
(650) 742-2000, as listed in official Medicare / NPI Registry data.
What is Conor T. Williams's NPI number?
1952927667. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Conor T. Williams works

Medicare's Facility Affiliation Data lists Conor T. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Conor T. Williams is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Conor T. Williams as a member of these groups (CMS data updated 2026-10-02).

  • Permanente Medical Group Inc10,996 clinicians in the group
  • Sutter Valley Medical Foundation2,500 clinicians in the group
  • DHHS, PHS, Naihs, Gallup Indian Medical Center186 clinicians in the group

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in South San Francisco

Clinicians with the same Medicare primary specialty in South San Francisco, CA — not a recommendation.

All internal medicine doctors in South San Francisco →

Clinician information

CredentialMD
Graduation year2020
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1952927667
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians