Quick answers
- Does Naomi S. Yoo accept Medicare assignment?
- Yes. Medicare's clinician data says Naomi S. Yoo 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 Naomi S. Yoo see?
- In 2024, CMS data shows 319 Original Medicare patients and 916 services for Naomi S. Yoo. This counts Original Medicare only and measures volume, not quality.
- What is Naomi S. Yoo's NPI number?
- 1447484746. 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 Naomi S. Yoo, 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 | 319 |
|---|---|
| Services billed to Medicare | 916 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)771 services
- Special stained specimen slides to identify organisms including interpretation and report (88312)82 services
- Special stained specimen slides to examine tissue, initial procedure (88342)22 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 cholesterol68%
- High blood pressure56%
- Arthritis38%
- Anxiety19%
- Diabetes18%
- Depression15%
Practice locations
Addresses where Naomi S. Yoo is enrolled with Medicare (CMS data updated October 2, 2026).
- 101 N Main StCoupeville, WA 98239 (425) 258‑3903
- 3901 Hoyt AveEverett, WA 98201 (425) 339‑5442
- 509 Olive Way, 900 the Polyclinic DowntownSeattle, WA 98101 (206) 860‑4700
- 904 7th AveSeattle, WA 98104 (206) 309‑1760
Group practices
Medicare enrollment lists Naomi S. Yoo as a member of these groups (CMS data updated October 2, 2026).
- Optum Care Washington PLLC683 clinicians in the group
- The Polyclinic PLLC365 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Washington
Clinicians with the same Medicare primary specialty in Washington — not a recommendation.
Other clinicians in Optum Care Washington PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Vanderbilt University School Of Medicine |
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447484746 |
| 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