Quick answers
- Which hospitals does Mary Y. Moon work at?
- Medicare's official clinician data lists Mary Y. Moon at 1 hospital: Hoag Memorial Hospital Presbyterian. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary Y. Moon see patients?
- Medicare's clinician data lists 8 practice locations, including Costa Mesa, CA, Tustin, CA and Huntington Beach, CA. Call before your visit to confirm the address.
- What is Mary Y. Moon's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Mary Y. Moon accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Y. Moon 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 Mary Y. Moon?
- (714) 477-8460, as listed in official Medicare / NPI Registry data.
- What is Mary Y. Moon's NPI number?
- 1124048202. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary Y. Moon works
Medicare's Facility Affiliation Data lists Mary Y. Moon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · CCN 050224
Practice locations
Addresses where Mary Y. Moon is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 1190 Baker St, Suite 105Costa Mesa, CA 92626 (714) 477‑8460
- 15000 Kensington Park Dr, Suite 170Tustin, CA 92782 (714) 477‑8300
- 19582 Beach Blvd, Suite 180Huntington Beach, CA 92648 (714) 477‑8050
- 21115 Newport Coast DrNewport Beach, CA 92657 (949) 557‑0730
- 24060 Camino Del Avion, Suite ADana Point, CA 92629 (949) 557‑0870
Group practices
Medicare enrollment lists Mary Y. Moon as a member of this group (CMS data updated 2026-10-02).
- HMTS Inc118 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Costa Mesa
Clinicians with the same Medicare primary specialty in Costa Mesa, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124048202 |
| 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