Quick answers
- Does Sophia N. Chun accept Medicare assignment?
- Yes. Medicare's clinician data says Sophia N. Chun accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Sophia N. Chun see?
- In 2024, CMS data shows 115 Original Medicare patients and 889 services for Sophia N. Chun. This counts Original Medicare only and measures volume, not quality.
- What is Sophia N. Chun's NPI number?
- 1104939990. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Sophia N. Chun, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 115 |
|---|---|
| Services billed to Medicare | 889 |
| Different services or procedures | 27 |
| Participating Medicare provider | Yes |
| Average age of these patients | 81 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)148 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)113 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)50 services
- Telephone medical discussion with physician, 11-20 minutes (99442)17 services
- Injection of drug or substance under skin or into muscle (96372)11 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure65%
- Arthritis46%
- Osteoporosis37%
- Anxiety27%
- Depression25%
Hospitals where Sophia N. Chun works
Medicare's Facility Affiliation Data lists Sophia N. Chun at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Lac/Rancho Los Amigos National Rehabilitation CenterDowney, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050717
- UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348
Practice locations
Addresses where Sophia N. Chun is enrolled with Medicare (CMS data updated October 2, 2026).
- 1661 Golden Rain RdSeal Beach, CA 90740 (562) 493‑9581
- 515 E Washington BlvdCrescent City, CA 95531 (707) 460‑1802
Group practices
Medicare enrollment lists Sophia N. Chun as a member of these groups (CMS data updated October 2, 2026).
- Healthcare Partners Affiliates Medical Group754 clinicians in the group
- Stallant Medical Group Inc16 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Seal Beach
Clinicians with the same Medicare primary specialty in Seal Beach, CA — not a recommendation.
Other clinicians in Healthcare Partners Affiliates Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1104939990 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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