Quick answers
- Where does Grant P. Williams see patients?
- Medicare's clinician data lists 3 practice locations, including Calexico, CA and Glendale, CA. Call before your visit to confirm the address.
- What is Grant P. Williams's specialty?
- Medicare lists Interventional Pain Management as the primary specialty, and also Anesthesiology and Pain Management.
- Does Grant P. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Grant P. 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 Grant P. Williams offer telehealth?
- Medicare's clinician data says Grant P. Williams offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Grant P. Williams?
- (760) 848-7378, as listed in official Medicare / NPI Registry data.
- What is Grant P. Williams's NPI number?
- 1013055128. 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 Grant P. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 501 E 3rd StCalexico, CA 92231 (760) 848‑7378
- 706 W Broadway, Suite 202Glendale, CA 91204 (877) 331‑3878
- 716 W Broadway, Suite 200Glendale, CA 91204 (818) 243‑9999
Specialties
- Interventional Pain Managementprimary
- Anesthesiologyalso
- Pain Managementalso
Find other Interventional Pain Management doctors in California →
Other interventional pain specialists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1013055128 |
| 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