Karl P. Undesser, MD, is a board-certified cardiac electrophysiologist who has practiced medicine in the Boise area for over 18 years. He began his schooling in biology at the University of California, San Diego, and later received a PhD in pharmacology and doctor of medicine from the University of Texas Health Science Center. Over the next several years, Dr. Undesser completed post-graduate education and training in Texas, North Carolina and California, including an electrophysiology fellowship with the Division of Cardiology at University of California, San Diego. Dr. Undesser is board-certified in internal medicine, cardiovascular disease and electrophysiology and has extensive research experience with several publications.


Medical School
University of Texas Health Science Center

Certifications & Memberships

Internal Medicine

Cardiovascular Disease



West Valley Medical Center



Procedures & Conditions

  • General Cardiology
  • Preventative Cardiology
  • Hypertension
  • Lipid Management
  • Stress Testing
  • Evaluation Syncope
  • Defibrillators/Pacemakers
  • Cardiac Arrhythmias


Cardiovascular Disease

Office Locations

West Valley Cardiology Services
1906 Fairview Ave
Suite 230
Caldwell, ID 83605
Phone: (208) 795-5073
Fax: (208) 401-3181

Additional Locations

West Valley Cardiology Services - Meridian

745 S Progress Ave
Meridian, ID 83642
Phone: (208) 795-5073
Fax: (208) 401-3181

West Valley Cardiology Services - Weiser

645 E. 5th St.
Weiser, ID 83672
Phone: (208) 795-5073

West Valley Medical Center

1717 Arlington Ave
Caldwell, ID 83605

West Valley Cardiology Services – Emmett

1202 E. Locust St.
Emmett, ID 83617 P: (208) 795-5073