Quick answers
- Where does Tomoko Williams see patients?
- Medicare's clinician data lists 3 practice locations, including Irvine, CA, Cedar Park, TX and Austin, TX. Call before your visit to confirm the address.
- What is Tomoko Williams's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Tomoko Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Tomoko 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.
- Does Tomoko Williams offer telehealth?
- Medicare's clinician data says Tomoko Williams offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Tomoko Williams?
- (949) 671-4673, as listed in official Medicare / NPI Registry data.
- What is Tomoko Williams's NPI number?
- 1255896262. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Tomoko Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 FivepointIrvine, CA 92618 (949) 671‑4673
- 1401 Medical Pkwy, Suite 200Cedar Park, TX 78613 (512) 260‑6050
- 4101 James Casey St, Suite 100Austin, TX 78745 (512) 447‑2202
Group practices
Medicare enrollment lists Tomoko Williams as a member of these groups (CMS data updated 2026-10-02).
- Texas Oncology PA1,014 clinicians in the group
- City of Hope Medical Foundation982 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Irvine
Clinicians with the same Medicare primary specialty in Irvine, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1255896262 |
| Corrections | Report 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians