Quick answers
- Where does William A. Leavitt see patients?
- Medicare's clinician data lists 2 practice locations, including San Fernando, CA and Valencia, CA. Call before your visit to confirm the address.
- What is William A. Leavitt's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does William A. Leavitt accept Medicare assignment?
- Medicare's clinician data says William A. Leavitt may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for William A. Leavitt?
- (818) 365-8086, as listed in official Medicare / NPI Registry data.
- What is William A. Leavitt's NPI number?
- 1588774988. 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 William A. Leavitt is enrolled with Medicare (CMS data updated 2026-10-02).
- 1600 San Fernando RdSan Fernando, CA 91340 (818) 365‑8086
- 23763 Valencia BlvdValencia, CA 91355 (661) 287‑1551
Group practices
Medicare enrollment lists William A. Leavitt as a member of this group (CMS data updated 2026-10-02).
- Northeast Valley Health Corporation78 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in San Fernando
Clinicians with the same Medicare primary specialty in San Fernando, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1588774988 |
| 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