Quick answers
- Which hospitals does Stephen Sun work at?
- Medicare's official clinician data lists Stephen Sun at 2 hospitals: Grossmont Hospital and Sharp Coronado Hospital and HLTHCR Ctr. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Stephen Sun see patients?
- Medicare's clinician data lists 2 practice locations, including Coronado, CA and La Mesa, CA. Call before your visit to confirm the address.
- What is Stephen Sun's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Stephen Sun accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen Sun 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 Stephen Sun?
- (619) 522-3600, as listed in official Medicare / NPI Registry data.
- What is Stephen Sun's NPI number?
- 1437644242. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephen Sun works
Medicare's Facility Affiliation Data lists Stephen Sun at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Grossmont HospitalLa Mesa, CA · Acute Care Hospital · CCN 050026
- Sharp Coronado Hospital and HLTHCR CtrCoronado, CA · Acute Care Hospital · CCN 050234
Practice locations
Addresses where Stephen Sun is enrolled with Medicare (CMS data updated 2026-10-02).
- 250 Prospect PlCoronado, CA 92118 (619) 522‑3600
- 5555 Grossmont Ctr DrLa Mesa, CA 91942 (619) 461‑1920
Group practices
Medicare enrollment lists Stephen Sun as a member of these groups (CMS data updated 2026-10-02).
- Emergency and Acute Care Medical Corporation422 clinicians in the group
- San Diego Critical Care Medical Group Inc78 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Coronado
Clinicians with the same Medicare primary specialty in Coronado, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Arizona College Of Osteopathic Medicine Mid Western University |
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437644242 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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