Dr. Karl Undesser, MD

Dr. Karl Undesser, MD

Cardiology  |  
Male  |  
60 y/o

Accepting new patients

Dr. Karl Undesser, MD is a cardiology doctor who practices in Caldwell, ID. He is 60 years old and has been practicing for 28 years. Dr. Undesser is affiliated with Saint Alphonsus Regional Medical Center, West Valley Medical Center and St. Luke's Boise Medical Center.

Learn about Dr. Undesser

Care Philosophy

Karl P. Undesser, MD, PhD, FACC is a cardiologist and cardiac electrophysiologist. He is board certified in clinical cardiac electrophysiology and cardiovascular disease, and is a fellow of the American College of Cardiology. He earned his medical degree from the University of Texas Health Science Center in San Antonio and completed his residency at Duke University Medical Center in Durham, North Carolina. Dr. Undesser joined West Valley Medical Group in February of 2015 and sees patients at the Caldwell office.  A Meridian office will be opening in the spring of 2015 and a new electrophysiology lab will be opening in the summer of 2015 at West Valley Medical Center.  
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Dr. Undesser's Experience

Dr. Undesser's experience matches your search based on the following criteria:
  • Based on total number of patients treated over the last 12 months
  • Specializes in Cardiology
  • Board certified in Cardiovascular Disease and Clinical Cardiac Electrophysiology
  • No sanctions found
  • No board actions found


  • Cardiology
  • Clinical Cardiac Electrophysiology
  • Internal Medicine

Board Certifications

  • Cardiovascular Disease
    Accredited by: American Board of Internal Medicine*
  • Clinical Cardiac Electrophysiology
    Accredited by: American Board of Internal Medicine*

Conditions Treated

  • Aneurysm
  • Aneurysm and Dissection of Heart
  • Angina and Acute Coronary Syndrome
  • Aortic Aneurysm
  • Aortic Stenosis
  • Aortic Valve Disease
  • Aortic Valve Regurgitation
  • Arrhythmias
  • Atrial Fibrillation
  • Atrial Flutter
  • Autonomic Disorders
  • Benign Tumor
  • Cardiomegaly
  • Cardiomyopathy
  • Carotid Artery Disease
  • Chest Pain
  • Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
  • Congenital Aortic Valve Disorders
  • Congenital Heart Defects
  • Congenital Heart Disease
  • Congestive Heart Failure
  • Coronary Artery Disease (CAD)
  • Endocarditis
  • Heart Attack (Acute Myocardial Infarction)
  • Heart Disease
  • Heart Murmur
  • Heart Palpitations
  • Hyperlipidemia
  • Hypertension
  • Hypertensive Chronic Kidney Disease
  • Hypertensive Heart Disease
  • Hypertensive Heart and Chronic Kidney Disease
  • Hypotension
  • Limb Swelling Caused by Fluid Overload
  • Mitral Valve Disease
  • Mitral Valve Regurgitation
  • Mitral Valve Stenosis
  • Pericardial Disease
  • Pulmonary Disease
  • Pulmonary Hypertension
  • Pulmonary Valve Disease
  • Septal Defect
  • Syncope
  • Thrombosis
  • Tricuspid Valve Disease
  • Vascular Disease
  • Venous Hypertension


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  • Ablation for Treatment of Cardiac Arrhythmias
  • Automatic Implantable Cardioverter Defibrillator (ICD) Implantation
  • Cardiac Catheterization (incl. Coronary Angiography)
  • Cardiac Electrophysiology
  • Cardiac Imaging
  • Cardiac Myocardial Perfusion Imaging
  • Cardiovascular Stress Test
  • Cardioversion, Elective
  • Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair
  • Chest CT (incl. Heart and Lungs)
  • Coronary Angioplasty, Atherectomy and Stent
  • Electrophysiological Study
  • Heart Surgery
  • Insertion of Epicardial Lead for Pacemaker or Cardioverter and-or Defibrillator
  • Insertion of Left Ventricular Lead for Pacemaker or Cardioverter and-or Defibrillator
  • Pacemaker Insertion or Replacement
  • Peripheral Artery Catheterization
  • Removal or Revision of Pacemaker or Cardioverter and-or Defibrillator
  • Thoracentesis
  • Tilt Testing or Cardiac Event Monitors

Background Check

Malpractice Claims not available

Healthgrades does not collect malpractice information for Idaho.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • University of California At San Diego
    Undergraduate School | Graduated 1979
  • University of Texas Medical School At San Antonio
    Medical School | Graduated 1989
  • Duke University Med Center
    Internship Hospital | Completed 1990
  • Duke University Med Center
    Residency Hospital | Completed 1992
  • University Of California San Diego
    Fellowship Hospital | Completed 1996

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Undesser has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. Undesser does not have any memberships or affiliations listed. If you are Dr. Undesser and would like to add memberships or affiliations, please update your profile.

West Valley Medical Center

is a Healthgrades Top-Rated Hospital

Hospital Quality

2017 Five Star Recipient for Treatment of Heart Attack

View Ratings

Dr. Undesser's Reviews

Likelihood of recommending Dr. Undesser to family and friends
based on 24 total reviews (12 with comments)
Dr. Undesser's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    Under 10 minutes
Patient Comments (12)
in Eagle, Idaho |
I have been a patient of Dr. Undesser for over 10 years, he did the procedure for my Atrial Flutter and no reoccurrence and if you have a need for a Cardiologist, Dr. Undesser is the one. He is professional, explains what he is telling you, ah that means you actually understand what he just told you rather than a long string of medical terms you know what he is talking and telling you. His staff is fast, gets you in the office, gets what is needed done or ready for the Doctor and in he comes.
in Meridian, ID |
Dr. Undesser performed a thorough examination, a complete review of my cardiac and pacemaker history, and then he asked superb questions about how I live my life and helped me better understand how to make the best choices that support good heart health. He listened to and thoroughly answered all my questions, and gave me what I consider to be the best medical and related lifestyle advice I have received from a cardiologist. He invested much more time with me than I expected.
in Boise, ID |
I would definitely recommend Dr. Undesser for examination and treatment of any heart related issues. He is very professional, friendly, well-dressed, and answers any questions in an expert manner.
Thank you for the positive feedback! We appreciate the kind words.
in Sweet, ID |
Dr. Undesser is an excellent cardiologist in my opinion. After several years of health concerns that remained an issue, Dr Undesser was the first doctor to balance medication appropriately and identify other health issues, provide appropriate treatment. I particularly appreciate his professional demeanor, his demonstrated concern for the patient, he listens, takes the time to understand patient concerns.
We strive to provide the highest quality in patient care. Thank you so much for sharing this story with us!
in Meridian, ID |
Absolutely terrific visit. Dr. Undesser is so professional and knowledgable. He really takes the time to explain your conditions and answers all questions. Explains all medications and proper usage to get the most benefit out the prescription. A true treasure to his patients.
Our practice aims to deliver the highest quality patient care. We love to hear about these positive experiences. Thanks for sharing this feedback with us!
in Eagle, Idaho |
Dr. Undesser diagnosed my heart condition, got me into surgery the very next day, took care of the problem, prescribed medication, not so much as a reminder of what I was experiencing has returned. If you have a heart problem, think you may have one do yourself a favor and your loved ones, if you have them, and work with Dr. Undesser. It's your life, take care of it. Best path I ever took. You cannot go wrong.
Our practice aims to deliver the highest quality patient care. We love to hear about these positive experiences. Thanks for sharing this feedback with us!
in Meridian, ID |
Always feel like I'm in good hands
in Jerome, ID |
Outstanding facility and everyone made an effort to make sure we were comfortable. Pleasant experience!
in Meridian ID |
Dr. Undesser and his staff are always professional but caring. Both he and his nurse show interest in what I have to say and answer my questions in layman's terms to assure my best understanding. I am always comfortable and I know I am in excellent hands from the time I walk in the door until I check out at the front desk. The convenience of an option to schedule my checkups at one of several different locations is much appreciated.
in Fruitland, ID |
Dr. Undesser is very knowledgeable and takes time to listen to his patients
Boise, ID |
He caught things that no other Dr.so good. I know I have to go in for another test...hopefully this will be the cure
in Nampa, ID |
This was my first appointment with Dr. Undesser. He asks all the questions needed to bring him up to speed about what's been going on with me. Than he explained everything very well. He Answered all my questions with great knowledge. I look forward working with him.
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Now Accepting New Patients
Dr. Undesser accepts 45 insurance carriers
  • AARP
  • Aetna
    Choice Plus POS II
  • Altius Health Plans
  • American Republic
  • Amerigroup (Wellpoint)
  • Assurant Health
  • Benesys
  • Blue Cross Blue Shield
    Blue Card PPO
  • Blue Cross of Idaho
    Blue Cross of Idaho PPO
  • CareSource
  • Cigna
    Cigna PPO
    Great West Healthcare-Cigna PPO
    Open Access
  • Commercial Insurance Company
  • Community Health Choice
  • CoreSource
  • First Choice Health
    First Choice Health PPO
  • First Health (Coventry Health Care)
    First Health (Coventry Health Care) PPO
  • Government Employees Health Association (GEHA)
  • Health Net
  • HealthPlus
  • HealthPlus Amerigroup
  • HealthSmart
  • Horizon Blue Cross Blue Shield of New Jersey
  • Humana
  • Husky Health
  • inHealth
  • INTotal Health
  • LifeWise
  • Mail Handlers Benefit Plan (MHBP)
  • Medicaid
  • Midwest Health Plan
  • Moda Health
  • Molina Healthcare
  • MultiPlan
    MultiPlan PPO
    PHCS Network PPO
  • Mutual of Omaha
  • ODS Health Plan
  • PacificSource
    Preferred PSN
  • Peach State Health Plan
  • Principal Life
  • Providence Health Plans
  • SelectHealth
  • Simply Healthcare Plans
  • Staywell (Wellcare)
  • Tricare
  • UnitedHealthCare
    Choice Plus POS
    Navigate POS
    Options PPO
  • Wellcare of Georgia

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Hospitals where Dr. Undesser has admitting privileges

West Valley Medical Center
1717 Arlington Ave
Caldwell, ID 83605
View Hospital Profile
St. Luke's Boise Medical Center
190 E Bannock St
Boise, ID 83712
View Hospital Profile
Saint Alphonsus Regional Medical Center
1055 N Curtis Rd
Boise, ID 83706
View Hospital Profile

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