Dr. Dennis Tridung Nguyen , MD
General Practice β’ Seattle, WA
3815 S Othello St
Seattle, WA 981183510
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
Dr. Dennis Nguyen is listed in NPPES under General Practice.
-
NPI assigned on August 18, 2023; this date does not establish years in practice.
-
Published CMS data list 16 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
-
Published Part D records, 2024:
- Amlodipine Besylate β 16 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
-
Fewer Part D prescriptions than 90% of clinicians listed under General Practice in Washington (2024, 59 clinicians with data). Median for this group: 306. Middle half: 84 to 1,730.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
Practice Location & Contact Primary Location
3815 S Othello St
Seattle, WA 981183510
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 4 distinct additional practice-address records in Auburn, WA; Bellevue, WA; Seattle, WA and 1 more. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
1995
What Public CMS Data Show
General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
28 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$124 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
Years since graduation
31 years (graduated 1995)
CMS Doctors and Clinicians data list 1995 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2023
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Nguyen has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Nguyen as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Seattle and Washington
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 90% of clinicians listed under General Practice in Washington (2024, 59 clinicians with data). Median for this group: 306. Middle half: 84 to 1,730.
Too few clinicians listed under General Practice in Seattle have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 95% of clinicians listed under General Practice in Washington (2024, 59 clinicians with data). Median for this group: $12,639. Middle half: $2,407 to $105,911.
Too few clinicians listed under General Practice in Seattle have Medicare Part D data for 2024 to compare.
33 active clinicians are listed under General Practice with a practice address in Seattle, WA (389 in Washington).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Seattle
3% of these 33 clinicians have the CMS telehealth indicator.
12.1% of these 33 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Medicare Part D prescriptions
CMS data for Part D prescriptions are available for 2024 only.
-
30-day fills
CMS data for 30-day fills are available for 2024 only.
-
Part D drug cost
CMS data for Part D drug cost are available for 2024 only.
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Amlodipine Besylate | Amlodipine Besylate | 16 | 840 | $123.73 | β |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-04-03NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - FAMILY PRACTICE
I20260501001185
WA
0648748251
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
1050 140th Ave Ne Ste A
Bellevue, WA 980052972
Phone: 4253733000
720 8th Ave S
Seattle, WA 981043032
Phone: 2067883700
4238 Auburn Way N
Auburn, WA 980021311
Phone: 2534440106
16549 Aurora Ave N
Shoreline, WA 981335308
Phone: 2065332600
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Advanced Registered Nurse Practitioner
Registered Nurse - Community Health
Registered Nurse
Pharmacist
Doctor of Pharmacy (Pharm.D.)
Nurse Practitioner - Family
Advanced Registered Nurse Practitioner
Nurse Practitioner - Family
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated August 18, 2023.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from September 2023 to August 2026.
NPI Administrative Meta
Other General Practices in Seattle
- Dr. Ryan Gould, MD
- Dr. Jennifer Yang, MD
- Dr. Gene Liaw, MD
- Dr. Helen Quan, MD
- Dr. Thejana Marasinghe, MD
- Dr. Quan Le, MD
Mailing Address
6307 121st St E
Puyallup, WA 983738831
Phone: 5419050856