Quick answers
- Where does Rex A. Werner see patients?
- Medicare's clinician data lists 1 practice location in El Cajon, CA. Call before your visit to confirm the address.
- What is Rex A. Werner's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Rex A. Werner accept Medicare assignment?
- Yes. Medicare's clinician data says Rex A. Werner 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 Rex A. Werner?
- (619) 670-6296, as listed in official Medicare / NPI Registry data.
- What is Rex A. Werner's NPI number?
- 1891760716. 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 Rex A. Werner is enrolled with Medicare (CMS data updated 2026-10-02).
- 2650 Jamacha Rd, Suite 155El Cajon, CA 92019 (619) 670‑6296
Group practices
Medicare enrollment lists Rex A. Werner as a member of this group (CMS data updated 2026-10-02).
- Rex Aaron Werner Od, Inc5 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in El Cajon
Clinicians with the same Medicare primary specialty in El Cajon, CA — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | University Alabama Birmingham - School Of Optometry |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891760716 |
| 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