Quick answers
- Where does Walter Thomas see patients?
- Medicare's clinician data lists 1 practice location in Simi Valley, CA. Call before your visit to confirm the address.
- What is Walter Thomas's specialty?
- Medicare lists Family Practice as the primary specialty, and also Addiction Medicine.
- Does Walter Thomas accept Medicare assignment?
- Yes. Medicare's clinician data says Walter Thomas 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 Walter Thomas offer telehealth?
- Medicare's clinician data says Walter Thomas offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Walter Thomas?
- (805) 527-1804, as listed in official Medicare / NPI Registry data.
- What is Walter Thomas's NPI number?
- 1952379463. 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 Walter Thomas is enrolled with Medicare (CMS data updated 2026-10-02).
- 1980 Sequoia AveSimi Valley, CA 93063 (805) 527‑1804
Group practices
Medicare enrollment lists Walter Thomas as a member of this group (CMS data updated 2026-10-02).
- Walter Thomas MD a Medical Corporation2 clinicians in the group
Specialties
- Family Practiceprimary
- Addiction Medicinealso
Other family doctors in Simi Valley
Clinicians with the same Medicare primary specialty in Simi Valley, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1973 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1952379463 |
| 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