Quick answers
- Where does John Anthony C. Diya see patients?
- Medicare's clinician data lists 2 practice locations, including Costa Mesa, CA and Huntington Beach, CA. Call before your visit to confirm the address.
- What is John Anthony C. Diya's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does John Anthony C. Diya accept Medicare assignment?
- Yes. Medicare's clinician data says John Anthony C. Diya 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 John Anthony C. Diya offer telehealth?
- Medicare's clinician data says John Anthony C. Diya offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John Anthony C. Diya?
- (833) 501-3079, as listed in official Medicare / NPI Registry data.
- What is John Anthony C. Diya's NPI number?
- 1275095663. 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 Anthony C. Diya is enrolled with Medicare (CMS data updated 2026-10-02).
- 1901 Newport Blvd, Suite 280Costa Mesa, CA 92627 (833) 501‑3079
- 7677 Ctr Ave, Suite 405Huntington Beach, CA 92647 (714) 369‑8037
Group practices
Medicare enrollment lists John Anthony C. Diya as a member of this group (CMS data updated 2026-10-02).
- Eagan Medical Group Inc8 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Costa Mesa
Clinicians with the same Medicare primary specialty in Costa Mesa, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1275095663 |
| 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