Quick answers
- Where does John J. Hernandez see patients?
- Medicare's clinician data lists 1 practice location in Thousand Oaks, CA. Call before your visit to confirm the address.
- What is John J. Hernandez's specialty?
- Medicare lists Otolaryngology as the primary specialty.
- Does John J. Hernandez accept Medicare assignment?
- Yes. Medicare's clinician data says John J. Hernandez 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 John J. Hernandez?
- (805) 494-6745, as listed in official Medicare / NPI Registry data.
- What is John J. Hernandez's NPI number?
- 1043363997. 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 John J. Hernandez is enrolled with Medicare (CMS data updated 2026-10-02).
- 425 Haaland Dr, Suite 206Thousand Oaks, CA 91361 (805) 494‑6745
Specialties
- Otolaryngologyprimary
Other ENT doctors in Thousand Oaks
Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 1973 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043363997 |
| 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