Quick answers
- Where does Guillermo Castillo see patients?
- Medicare's clinician data lists 2 practice locations, including Chula Vista, CA and Riverside, CA. Call before your visit to confirm the address.
- What is Guillermo Castillo's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Guillermo Castillo accept Medicare assignment?
- Medicare's clinician data says Guillermo Castillo may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- Does Guillermo Castillo offer telehealth?
- Medicare's clinician data says Guillermo Castillo offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Guillermo Castillo?
- (760) 662-8659, as listed in official Medicare / NPI Registry data.
- What is Guillermo Castillo's NPI number?
- 1366558322. 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 Guillermo Castillo is enrolled with Medicare (CMS data updated 2026-10-02).
- 1375 Oakpoint AveChula Vista, CA 91913 (760) 662‑8659
- 1426 University Ave, Suite CRiverside, CA 92507 (951) 522‑1425
Group practices
Medicare enrollment lists Guillermo Castillo as a member of this group (CMS data updated 2026-10-02).
- Vital Care Health Group a Medical Corporation4 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Chula Vista
Clinicians with the same Medicare primary specialty in Chula Vista, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Southern California Keck School Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1366558322 |
| 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