Karen K. Koo, MD

Medicare activity in 2024

Official CMS public-use data for Karen K. Koo, 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.

Most frequent services

1. Critical care, first 30-74 minutes (99291)83 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)26 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%
• Heart failure75%
• High cholesterol69%
• Chronic kidney disease60%
• Ischemic heart disease54%
• Diabetes48%

Hospitals where Karen K. Koo works

Medicare's Facility Affiliation Data lists Karen K. Koo 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.

• Swedish IssaquahIssaquah, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500152
• Swedish Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500027
• Swedish Medical Center / Cherry HillSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500025

Practice locations

Addresses where Karen K. Koo is enrolled with Medicare (CMS data updated October 2, 2026).

• 500 17th AveSeattle, WA 98122 (206) 320‑2000
• 747 BroadwaySeattle, WA 98122 (206) 386‑6000
• 751 NE Blakely DrIssaquah, WA 98029

Group practices

Medicare enrollment lists Karen K. Koo as a member of this group (CMS data updated October 2, 2026).

• Swedish Health Services1,037 clinicians in the group

Specialties

• Critical Care (Intensivists)primary
• Internal Medicinealso

Find other Critical Care (Intensivists) doctors in Washington →

Other critical care doctors in Seattle

Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.

• Margaret F. Ragland, MD
• Omar F. Bayomy, MD
• Ofer Yanay, MD
• Garbo Mak, MD
• Jeffrey H. Sullivan, MD
• John D. Lang, MD
• Engi F. Attia, MD
• Lauren C. Rakes, MD

All critical care doctors in Seattle →

Other clinicians in Swedish Health Services

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Sejal V. Raval, PA
• Emmanuel Boateng, MD
• Heidi M. Dishneau, NP
• Susan F. Goodall, CNM
• Luis Lantigua-Tatem, MD
• Rozaliya Baron, MD

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians