Quick answers
- Does Duong M. Duong accept Medicare assignment?
- Yes. Medicare's clinician data says Duong M. Duong 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 Duong M. Duong see?
- In 2024, CMS data shows 73 Original Medicare patients and 379 services for Duong M. Duong. This counts Original Medicare only and measures volume, not quality.
- What is Duong M. Duong's NPI number?
- 1831154293. 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 Duong M. Duong, 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 | 73 |
|---|---|
| Services billed to Medicare | 379 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 85 |
Most frequent services
- Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes (99349)315 services
- Residence visit for new patient with high level of medical decision making, per day, if using time, at least 75 minutes (99345)37 services
- Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)13 services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)12 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).
- Alzheimer's disease or dementia75%
- High blood pressure60%
- High cholesterol47%
- Arthritis45%
- Depression45%
- Anxiety45%
Practice locations
Addresses where Duong M. Duong is enrolled with Medicare (CMS data updated October 2, 2026).
- 9725 SE 36th St, 214 Northwest GeriatricsMercer Island, WA 98040 (206) 275‑3588
Group practices
Medicare enrollment lists Duong M. Duong as a member of this group (CMS data updated October 2, 2026).
- John H Addison MD PS6 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Washington
Clinicians with the same Medicare primary specialty in Washington — not a recommendation.
Other clinicians in John H Addison MD PS
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1975 (51 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831154293 |
| 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