Quick answers
- Does Louis M. Zucker accept Medicare assignment?
- Yes. Medicare's clinician data says Louis M. Zucker 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 Louis M. Zucker see?
- In 2024, CMS data shows 11 Original Medicare patients and 25 services for Louis M. Zucker. This counts Original Medicare only and measures volume, not quality.
- What is Louis M. Zucker's NPI number?
- 1124128145. 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 Louis M. Zucker, 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 | 11 |
|---|---|
| Services billed to Medicare | 25 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Practice locations
Addresses where Louis M. Zucker is enrolled with Medicare (CMS data updated October 2, 2026).
- 1120 W Washington BlvdLos Angeles, CA 90015 (213) 623‑2225
- 1236 N Magnolia AveAnaheim, CA 92801 (714) 995‑1000
- 824 E Carson St, Suite 104Carson, CA 90745 (310) 830‑9706
Group practices
Medicare enrollment lists Louis M. Zucker as a member of this group (CMS data updated October 2, 2026).
- Healthcare Partners Affiliates Medical Group754 clinicians in the group
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, 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 | University Of Southern California Keck School Of Medicine |
| Graduation year | 1964 (62 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) | 1124128145 |
| 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