Quick answers
- Does Quan D. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Quan 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 Quan D. Nguyen see?
- In 2024, CMS data shows 147 Original Medicare patients and 625 services for Quan D. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Quan D. Nguyen's NPI number?
- 1487608766. 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 Quan 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 | 147 |
|---|---|
| Services billed to Medicare | 625 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)193 services
- Imaging of retina (92134)132 services
- Extended exam of the back part of the eye with retinal drawing (92201)65 services
- Exam of retinal blood vessels using a special camera after injection of a dye (92235)63 services
- Photography of content of eyes (92285)39 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 cholesterol73%
- High blood pressure65%
- Arthritis39%
- Diabetes35%
- Osteoporosis24%
- Chronic kidney disease20%
Hospitals where Quan D. Nguyen works
Medicare's Facility Affiliation Data lists Quan D. 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.
- Santa Clara Valley Medical CenterSan Jose, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050038
- Stanford Health CareStanford, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050441
Practice locations
Addresses where Quan D. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1133 E Stanley Blvd, Suite 111Livermore, CA 94550 (650) 723‑4000
- 2452 Watson CtPalo Alto, CA 94303 (650) 723‑6995
- 300 Pasteur DrStanford, CA 94305 (650) 723‑4000
- 751 S Bascom AveSan Jose, CA 95128 (408) 885‑5000
- 751 S Bascom Ave, Santa Clara Vly MedSan Jose, CA 95128 (408) 885‑5000
Group practices
Medicare enrollment lists Quan D. Nguyen as a member of these groups (CMS data updated October 2, 2026).
- Stanford Health Care3,122 clinicians in the group
- County of Santa Clara1,022 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Livermore
Clinicians with the same Medicare primary specialty in Livermore, CA — not a recommendation.
Other clinicians in Stanford Health Care
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Perelman School Of Med At The University Of Pennsylvania |
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487608766 |
| 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