Quick answers
- Does Tam Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Tam 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 Tam Nguyen see?
- In 2024, CMS data shows 126 Original Medicare patients and 1,344 services for Tam Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Tam Nguyen's NPI number?
- 1720153182. 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 Tam 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 | 126 |
|---|---|
| Services billed to Medicare | 1,344 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)742 services
- Injection of drug or substance under skin or into muscle (96372)300 services
- Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow (G0181)198 services
- Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)32 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)16 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%
- Diabetes74%
- Arthritis61%
- COPD58%
- Chronic kidney disease52%
Practice locations
Addresses where Tam Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 19087 Chandon LnHuntington Beach, CA 92648
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Huntington Beach
Clinicians with the same Medicare primary specialty in Huntington Beach, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tulane University School Of Medicine |
| Graduation year | 1994 (32 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) | 1720153182 |
| 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