Quick answers
- Does Maggie S. Chau accept Medicare assignment?
- Yes. Medicare's clinician data says Maggie S. Chau 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 Maggie S. Chau see?
- In 2024, CMS data shows 87 Original Medicare patients and 411 services for Maggie S. Chau. This counts Original Medicare only and measures volume, not quality.
- What is Maggie S. Chau's NPI number?
- 1568576445. 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 Maggie S. Chau, 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 | 87 |
|---|---|
| Services billed to Medicare | 411 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)230 services
- Influenza vaccine split virus, preservative free (90662)33 services
- Administration of influenza virus vaccine (G0008)25 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)24 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)18 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%
- Chronic kidney disease75%
- Diabetes47%
- Osteoporosis37%
- Arthritis28%
Practice locations
Addresses where Maggie S. Chau is enrolled with Medicare (CMS data updated October 2, 2026).
- 200 Jose Figueres Ave, Suite 205San Jose, CA 95116 (408) 923‑8098
Specialties
- Internal Medicineprimary
Other internal medicine doctors in San Jose
Clinicians with the same Medicare primary specialty in San Jose, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 1992 (34 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) | 1568576445 |
| 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