Quick answers
- Does Jimmy H. Hwang accept Medicare assignment?
- Yes. Medicare's clinician data says Jimmy H. Hwang 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 Jimmy H. Hwang see?
- In 2024, CMS data shows 53 Original Medicare patients and 656 services for Jimmy H. Hwang. This counts Original Medicare only and measures volume, not quality.
- What is Jimmy H. Hwang's NPI number?
- 1316965494. 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 Jimmy H. Hwang, 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 | 53 |
|---|---|
| Services billed to Medicare | 656 |
| Different services or procedures | 14 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Aspiration and/or injection of fluid from large joint (20610)220 services
- Hyaluronan or derivative, hyalgan, supartz or visco-3, for intra-articular injection, per dose (J7321)216 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)99 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)63 services
- Online digital evaluation and management service for an established patient for up to 7 days, total time 21 or more minutes (99423)19 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%
- Arthritis75%
- Osteoporosis55%
- Diabetes51%
- Chronic kidney disease38%
Practice locations
Addresses where Jimmy H. Hwang is enrolled with Medicare (CMS data updated October 2, 2026).
- 18251 Roscoe Blvd, Suite 104Northridge, CA 91325 (818) 885‑0588
- 223 N Garfield AveMonterey Park, CA 91754 (626) 571‑9806
Specialties
- Rheumatologyprimary
Other rheumatologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1980 (46 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316965494 |
| 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
- 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