Quick answers
- Does Mai-Trinh D. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Mai-Trinh D. 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 Mai-Trinh D. Nguyen see?
- In 2024, CMS data shows 251 Original Medicare patients and 475 services for Mai-Trinh D. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Mai-Trinh D. Nguyen's NPI number?
- 1699886523. 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 Mai-Trinh D. 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 | 251 |
|---|---|
| Services billed to Medicare | 475 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Test to assess middle ear function (92567)150 services
- Test for hearing various pitches using earphone (92552)138 services
- Comprehensive hearing and speech recognition test (92557)67 services
- Test for ability to detect and repeat spoken words with speech recognition (92556)63 services
- Test for hearing various pitches using earphone and device placed against the bone (92553)49 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 cholesterol75%
- High blood pressure71%
- Arthritis37%
- Diabetes32%
- Osteoporosis23%
- Ischemic heart disease22%
Practice locations
Addresses where Mai-Trinh D. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 3200 Kearney StFremont, CA 94538 (510) 490‑1222
Group practices
Medicare enrollment lists Mai-Trinh D. Nguyen as a member of this group (CMS data updated October 2, 2026).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Qualified Audiologistprimary
Other audiologists in Fremont
Clinicians with the same Medicare primary specialty in Fremont, CA — not a recommendation.
Other clinicians in Sutter Bay Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | AU |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699886523 |
| 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