Quick answers
- Which hospitals does Ilsong J. Chong work at?
- Medicare's official clinician data lists Ilsong J. Chong at 1 hospital: Tri-City Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ilsong J. Chong see patients?
- Medicare's clinician data lists 6 practice locations, including San Marcos, CA and Oceanside, CA. Call before your visit to confirm the address.
- What is Ilsong J. Chong's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Ilsong J. Chong accept Medicare assignment?
- Yes. Medicare's clinician data says Ilsong J. Chong 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 Ilsong J. Chong?
- (619) 736-6700, as listed in official Medicare / NPI Registry data.
- What is Ilsong J. Chong's NPI number?
- 1831240159. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ilsong J. Chong works
Medicare's Facility Affiliation Data lists Ilsong J. Chong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Tri-City Medical CenterOceanside, CA · Acute Care Hospital · CCN 050128
Practice locations
Addresses where Ilsong J. Chong is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 150 Valpreda RdSan Marcos, CA 92069 (619) 736‑6700
- 3998 Vista WayOceanside, CA 92056 (760) 736‑6767
- 3998 Vista Way, Suite 202Oceanside, CA 92056 (760) 736‑6767
- 3998 Vista Way, Suite 204Oceanside, CA 92056 (760) 736‑6767
- 605 Crouch StOceanside, CA 92054 (760) 757‑4566
Group practices
Medicare enrollment lists Ilsong J. Chong as a member of this group (CMS data updated 2026-10-02).
- North County Health Project Inc64 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in San Marcos
Clinicians with the same Medicare primary specialty in San Marcos, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At Houston |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831240159 |
| 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