Quick answers
- Does Tien Trinh accept Medicare assignment?
- Yes. Medicare's clinician data says Tien Trinh 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 Tien Trinh see?
- In 2024, CMS data shows 846 Original Medicare patients and 9,655 services for Tien Trinh. This counts Original Medicare only and measures volume, not quality.
- What is Tien Trinh's NPI number?
- 1881791135. 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 Tien Trinh, 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 | 846 |
|---|---|
| Services billed to Medicare | 9,655 |
| Different services or procedures | 77 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)3,732 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)975 services
- Annual alcohol misuse screening, 5 to 15 minutes (G0442)649 services
- Annual, face-to-face intensive behavioral therapy for cardiovascular disease, individual, 15 minutes (G0446)649 services
- Advance care planning, first 30 minutes (99497)640 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%
- Diabetes75%
- Chronic kidney disease48%
- Arthritis41%
- Osteoporosis39%
Practice locations
Addresses where Tien Trinh is enrolled with Medicare (CMS data updated October 2, 2026).
- 1244 N Marine Corps DrTamuning, GU 96913 (671) 647‑8262
- 1244 N Marine Corps Dr, Suite 101Tamuning, GU 96913
- 410 N Winchester BlvdSanta Clara, CA 95050 (408) 248‑3736
- 8170 Murray AveGilroy, CA 95020 (408) 842‑9311
Group practices
Medicare enrollment lists Tien Trinh as a member of this group (CMS data updated October 2, 2026).
- American Medical Center, LLC18 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Tamuning
Clinicians with the same Medicare primary specialty in Tamuning, GU — not a recommendation.
Other clinicians in American Medical Center, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Js Weill Medical College, Cornell University |
| Graduation year | 1993 (33 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) | 1881791135 |
| 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