Quick answers
- Does Karen K. Stout accept Medicare assignment?
- Yes. Medicare's clinician data says Karen K. Stout 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 Karen K. Stout see?
- In 2024, CMS data shows 322 Original Medicare patients and 586 services for Karen K. Stout. This counts Original Medicare only and measures volume, not quality.
- What is Karen K. Stout's NPI number?
- 1306921127. 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 Karen K. Stout, 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 | 322 |
|---|---|
| Services billed to Medicare | 586 |
| Different services or procedures | 26 |
| Participating Medicare provider | Yes |
| Average age of these patients | 68 |
Most frequent services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)183 services
- Ultrasound of heart with color-depicted blood flow, rate and valve function (93325)54 services
- Ultrasound of heart, follow-up (93308)52 services
- Heart muscle strain imaging (93356)48 services
- Critical care, first 30-74 minutes (99291)44 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 pressure73%
- High cholesterol66%
- Heart failure45%
- Ischemic heart disease41%
- Arthritis37%
- Atrial fibrillation37%
Hospitals where Karen K. Stout works
Medicare's Facility Affiliation Data lists Karen K. Stout at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Confluence Health HospitalWenatchee, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500016
- University of Washington Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 500008
Practice locations
Addresses where Karen K. Stout is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 15; the Medicare profile lists all.
- 1201 S Miller StWenatchee, WA 98801 (509) 662‑2208
- 1355 N 205th StShoreline, WA 98133 (206) 542‑5656
- 1455 NW Leary Way, Suite 250Seattle, WA 98107 (206) 789‑7777
- 1701 Columbia RdSeattle, WA 98195 (206) 598‑3100
- 17638 140th Ave NEWoodinville, WA 98072 (425) 485‑4100
Group practices
Medicare enrollment lists Karen K. Stout as a member of these groups (CMS data updated October 2, 2026).
- The Association of University Physicians3,535 clinicians in the group
- Central Washington Health Services Association721 clinicians in the group
Specialties
- Adult Congenital Heart Disease (ACHD)primary
- Cardiovascular Disease (Cardiology)also
- Pediatric Medicinealso
Find other Adult Congenital Heart Disease (ACHD) doctors in Washington →
Other adult congenital heart disease cardiologists in Washington
Clinicians with the same Medicare primary specialty in Washington — not a recommendation.
- Andrew R. Pistner, MD
- Zachary L. Steinberg, MD
- Brian H. Morray, MD
- Jason Deen, MD
- Yonatan Buber, MD
- Eric V. Krieger
- Jill M. Steiner, MD
All adult congenital heart disease cardiologists in Washington →
Other clinicians in The Association of University Physicians
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Arizona College Of Medicine |
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1306921127 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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