Quick answers
- Does Phuong T. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Phuong T. 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 Phuong T. Nguyen see?
- In 2024, CMS data shows 129 Original Medicare patients and 548 services for Phuong T. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Phuong T. Nguyen's NPI number?
- 1336609908. 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 Phuong T. 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 | 129 |
|---|---|
| Services billed to Medicare | 548 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)199 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)69 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)66 services
- Annual depression screening, 5 to 15 minutes (G0444)52 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)30 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 pressure64%
- Arthritis41%
- Diabetes36%
- Osteoporosis34%
- Depression28%
Practice locations
Addresses where Phuong T. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 147 W Sierra Madre BlvdSierra Madre, CA 91024 (626) 355‑3443
Group practices
Medicare enrollment lists Phuong T. Nguyen as a member of this group (CMS data updated October 2, 2026).
- Sierra Madre Community Medical Group Inc5 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in Sierra Madre Community Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Touro Un Col Of Osteopathic Medicine, Henderson |
| Graduation year | 2019 (7 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) | 1336609908 |
| 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