Quick answers
- Does Sara T. Chau accept Medicare assignment?
- Yes. Medicare's clinician data says Sara T. 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 Sara T. Chau see?
- In 2024, CMS data shows 34 Original Medicare patients and 49 services for Sara T. Chau. This counts Original Medicare only and measures volume, not quality.
- What is Sara T. Chau's NPI number?
- 1619194107. 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 Sara T. 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 | 34 |
|---|---|
| Services billed to Medicare | 49 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)20 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 cholesterol74%
- High blood pressure47%
- Arthritis38%
Practice locations
Addresses where Sara T. Chau is enrolled with Medicare (CMS data updated October 2, 2026).
- 14150 Culver Dr, Suite 100Irvine, CA 92604 (949) 552‑4584
- 4950 Barranca Pkwy, Suite 103Irvine, CA 92604 (949) 552‑2700
- 660 Baker StCosta Mesa, CA 92626
- 722 Baker StCosta Mesa, CA 92626 (714) 557‑6300
Group practices
Medicare enrollment lists Sara T. Chau as a member of these groups (CMS data updated October 2, 2026).
- Memorialcare Medical Foundation566 clinicians in the group
- Coastal Family Medicine Inc34 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Irvine
Clinicians with the same Medicare primary specialty in Irvine, CA — not a recommendation.
Other clinicians in Memorialcare Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619194107 |
| 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