Quick answers
- Does Chau L. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Chau L. Nguyen 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 Chau L. Nguyen see?
- In 2024, CMS data shows 12 Original Medicare patients and 23 services for Chau L. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Chau L. Nguyen's NPI number?
- 1861718397. 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 Chau L. Nguyen, 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 | 12 |
|---|---|
| Services billed to Medicare | 23 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 65 |
Hospitals where Chau L. Nguyen works
Medicare's Facility Affiliation Data lists Chau L. Nguyen 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.
- Kaiser Foundation Hospital - South BayHarbor City, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050411
Practice locations
Addresses where Chau L. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 18600 S Figueroa StGardena, CA 90248 (310) 325‑5111
- 25821 Vermont AveHarbor City, CA 90710 (310) 325‑5111
- 25825 Vermont AveHarbor City, CA 90710 (310) 325‑5111
- 393 E Walnut StPasaden, CA 91188 (877) 608‑0044
- 393 E Walnut St 3rd FlPasadena, CA 91188
Group practices
Medicare enrollment lists Chau L. Nguyen as a member of this group (CMS data updated October 2, 2026).
- Southern California Permanente Medical Group11,293 clinicians in the group
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in Southern California Permanente Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2010 (16 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861718397 |
| 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