Quick answers
- Does Hyunseok Kim accept Medicare assignment?
- Yes. Medicare's clinician data says Hyunseok Kim 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 Hyunseok Kim see?
- In 2024, CMS data shows 186 Original Medicare patients and 331 services for Hyunseok Kim. This counts Original Medicare only and measures volume, not quality.
- What is Hyunseok Kim's NPI number?
- 1558758524. 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 Hyunseok Kim, 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 | 186 |
|---|---|
| Services billed to Medicare | 331 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)111 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)64 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)34 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)32 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)27 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 blood pressure75%
- High cholesterol75%
- Arthritis58%
- Diabetes57%
- Chronic kidney disease52%
- Ischemic heart disease46%
Hospitals where Hyunseok Kim works
Medicare's Facility Affiliation Data lists Hyunseok Kim 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.
- Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050625
- Hollywood Presbyterian Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050063
Practice locations
Addresses where Hyunseok Kim is enrolled with Medicare (CMS data updated October 2, 2026).
- 1300 N Vermont AveLos Angeles, CA 90027 (213) 413‑3000
- 8700 Beverly BlvdWest Hollywood, CA 90048 (310) 423‑3277
Group practices
Medicare enrollment lists Hyunseok Kim as a member of these groups (CMS data updated October 2, 2026).
- Cedars-Sinai Medical Center799 clinicians in the group
- Sycamore Hill Hospitalist Medical Group Inc16 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Other clinicians in Cedars-Sinai Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1558758524 |
| 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