John K. Feller, MD

Medicare activity in 2024

Official CMS public-use data for John K. Feller, 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. Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)1,171 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)462 services
3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)380 services
4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)177 services
5. Insertion of needle into vein for collection of blood sample (36415)174 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 cholesterol75%
• High blood pressure65%
• Arthritis45%
• Ischemic heart disease32%
• Atrial fibrillation27%
• Chronic kidney disease22%

Hospitals where John K. Feller works

Medicare's Facility Affiliation Data lists John K. Feller 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 Medical Center / Cherry HillSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500025
• Virginia Mason Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 500005

Practice locations

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

• 904 7th AveSeattle, WA 98104 (206) 309‑1760

Group practices

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

• The Polyclinic PLLC365 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary

Find other Cardiovascular Disease (Cardiology) doctors in Washington →

Other cardiologists in Seattle

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

• Tiffany Chen, MD
• Catherine M. Otto, MD
• Tigran Kakhktsyan, MD
• Iniya Rajendran, MD
• Janna L. Merte, MD
• Vidhushei Yogeswaran, MD
• Andrew P. Wescott, MD
• Nathan E. Green, MD

All cardiologists in Seattle →

Other clinicians in The Polyclinic PLLC

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

• Cameron J. Seibold, MD
• Dewayne T. Bradley, MD
• Kelly N. Lyp, NP
• Laura J. Gladstone, MD
• Jacqueline Panko, MD
• Stacy C. Henderson, NP

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