Dr. Karl Undesser, MD

Cardiology •  Male • Age 62

  
Accepting new patients
Telehealth services available

Dr. Karl Undesser, MD is a Cardiology Specialist in Meridian, ID and has over 31 years of experience in the medical field. Dr. Undesser has more experience with Adult Congenital Cardiac Disorders, Implantable Cardiac Devices, and Electrophysiology than other specialists in his area. He graduated from University of Texas Medical School At San Antonio medical school in 1989. He is affiliated with medical facilities such as West Valley Medical Center and Saint Alphonsus Regional Medical Center. He is accepting new patients and has indicated that he accepts telehealth appointments. Be sure to call ahead with Dr. Undesser to book an appointment.


Locations

West Valley Cardiology Services

New Patient?
(208) 795-5073
Meridian Office745 S Progress Ave Meridian, ID 83642
1

West Valley Medical Group

New Patient?
(208) 795-5073
Caldwell1906 Fairview Ave Caldwell, ID 83605
2
  • Call
  • Fax
  • Hours
    • Mon: 8:00am - 5:00pm
    • Tue: 8:00am - 5:00pm
    • Wed: 8:00am - 5:00pm
    • Thu: 8:00am - 5:00pm
    • Fri: 8:00am - 5:00pm
    • Sat: closed
    • Sun: closed
  • Directions

Dr. Undesser's Reviews

Likelihood to recommend Dr. Undesser

4.8

Based on 67 ratings

5 Stars
92.53731343283582%
(62)
4 Stars
1.492537313432836%
(1)
3 Stars
1.492537313432836%
(1)
2 Stars
1.492537313432836%
(1)
1 Star
2.985074626865672%
(2)
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What People Say About Dr. Karl Undesser, MD
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Dr Undesser was my husband's and my EP untill he left Idaho cardiology. So sad to see him go. He is a brilliant, no nonsense Dr. He tells it to you straight. He takes time to listen to his patients and works with them. His bedside manner might be a bit abrupt, but his skills and knowledge are impeccable. You won't find a better EP Cardiologist. My husband is on his fifth ICD, all but the last put in and managed by Dr. Undesser very effectively. Wish we could have had him do the last one. Very unhappy with the quality of care my husband now receives.
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Sarah J Barker – Jun 17, 2020
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I AM ALWAYS HAPPY TO SEE DR. UNDESSER =WHOM I HAVE HAD FOR SEVERAL YEARS. HE IS EASY TO TALK TO AND GIVES PRECISE ANSWERS. ALWAYS ASKS RE:MY GENERAL HEALTH AND ANY QUESTIONS I MIGHT HAVE.
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LYDIA M. BLACK – Jun 15, 2020
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It was my pacemaker check at home. It went very well.
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Catherine Mooney – May 18, 2020
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I had a great experience with Dr. Undesser and his entire staff, they were very cordial and made me feel comfortable immediately. Dr. Undesser, in his no nonsense way explained my issues and remedies, in a plain and simple way. Thank you for your service. But i hope i see you as minimally as possible, over the next 20 years.:)
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Dale Newberry – May 12, 2020
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This was a check on my defibrillator/pacemaker via telephone-I have been a patient of Dr. Undessor for more than 15 years. I have found him to be very professional and interested in my well being. I would recommend Dr. Undessor to anyone who would need his expertise.
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Ken Bowman – May 12, 2020
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Everything went smoothly except trying to contact the office by phone. The staff were quite friendly and helpful.
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Glen Schofer – May 04, 2020
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It was my yearly follow up . Dr Undesser and his staff listen. That is not my experience with most cardiologist. After a year of struggling with my issue and being told don't worry, I found Dr Undesser and have been with him ever since. He listens and addresses my concerns with knowledge and empathy.
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Anita – Apr 23, 2020
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Dr Undesser has been my cardiologist for many years and I highly recommend him. I have A pacemaker and have it checked personally by him every three months and my appointment is always a pleasant experience all staff is professional and on time and it Is always a pleasure to see Dr Undesser.
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Betty M Sawyer – Apr 23, 2020
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Fairly quick meeting to discuss my condition. Dr. Undesser was straight to the point, thorough and explained my condition clearer than my previous providers. His no-non sense/no guarentee approach showcased his expertise and professionalism. I have no doubt I will be choosing him for my future appointments. Thank you Dr!
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Brazier – Mar 04, 2020
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My wife and I recently moved to area from Arizona and I needed to find a Cardiologist that I could be comfortable with. Dr Undesser was a good fit for my situation. He took the time to understand my condition fully and explained any options that would be available if required in the future. Could not be more pleased.
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Jan 18, 2020
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Dr. Undesser is an excellent, patient care oriented, and to the point Cardiologist. Examination and discussion with him made errors in My wife's previous diagnosis and heart related treatment obvious.
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Jerry Kuhnhausen – Jan 14, 2020
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Dr. Undesser is absolutely one of the finest physicians that has ever treated me.
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Dec 29, 2019
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I found the office and was greeted very quickly and professionally by secretary at window. Filled out a short form, was asked to take a seat and that they would be with me shortly. i had brought a book as waiting times can be extreme. I had barely opened my book when the Doctors assistant asked me to follow her. I was quickly weighed and taken to an office. She took my blood pressure and asked if I had any questions or concerns. She said the Doctor would be right with me, closed door. Within 1-2 minutes the Doctor rapped on the door entered and did my consultation. He had obviously reviewed my charts before and asked i I had any questions or concerns. He suggested changing medications. Said everything looked good and stable and would need to see me in a year unless anything changed. Totally professional experience from start to finish. I would recommend them highly!!
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Greg McClean – Dec 03, 2019
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Dr. Undersser is the best. He is always willing to listen to and give me his opinion on anything I have to go over with him. He is super patient and gives me the exact attention I need on my visits.
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Monica – Nov 19, 2019
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Great staff and Dr. Undesser is a great communicator as well as a skill doctor!
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Debra Curry – Nov 09, 2019
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I always feel comfortable seeing Dr. Undesser. He takes time to listen to me and is always friendly and caring
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Nov 06, 2019
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I've seen him 3 times and spent less than 15 minutes with him the entire time. Does not actually care what is wrong with you and just prescribes medication. Makes you feel extremely stupid for asking any questions. I wish I could give 0 stars, worst doctor experience I have ever had in my life. If you get a referral to him, GO SOMEWHERE ELSE.
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Cindi – Oct 30, 2019
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I have been going to Dr Undesser for about 13 years. He is the utmost professional and very knowledgeable. I fully trust his recommendations. I would recommend him to any of my family or friends. Thank you for the excellent care!
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Todd Nielsen – Oct 22, 2019
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Knowledge and friendly office!
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Oct 21, 2019
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Very caring and knowledgeable. My mom will be 90 in December and Dr. Undesser is keeping her going strong! She just loves him!!
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BettyWinkelbauer in Caldwell, ID – Oct 05, 2019
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Thank you for the wonderful feedback Betty!
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Insurance Check

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Dr. Undesser accepts

Accepted insurance can change. Please double-check when making an appointment.

(208) 795-5073

Dr. Undesser accepts the following insurance:

AARP
Aetna
Choice Plus POS II
Altius Health Plans
American Republic
Amerigroup (Wellpoint)
Medicaid
Anthem
National (BlueCard) PPO
Assurant Health
Benesys
Blue Cross Blue Shield
Blue Card PPO
Blue Cross of Idaho
Blue Cross of Idaho PPO
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
HealthyBlue Advantage
CareSource
Medicaid
Cigna
Cigna PPO
Great West Healthcare-Cigna PPO
Open Access
Open Access Plus
Commercial Insurance Company
Community Health Choice
Medicaid
CoreSource
First Choice Health
First Choice Health PPO
First Health (Coventry Health Care)
First Health (Coventry Health Care) PPO
Government Employees Health Association (GEHA)
GEHA
Health Net
Medicaid
HealthPlus
Medicaid
HealthPlus Amerigroup
Medicaid
HealthSmart
Horizon Blue Cross Blue Shield of New Jersey
Medicaid
Humana
Husky Health
Medicaid
inHealth
Medicaid
INTotal Health
Medicaid
LifeWise
Mail Handlers Benefit Plan (MHBP)
Medicaid
Midwest Health Plan
Medicaid
Moda Health
Molina Healthcare
Medicaid
MultiPlan
MultiPlan PPO
PHCS Network PPO
Mutual of Omaha
ODS Health Plan
PacificSource
Preferred PSN
Peach State Health Plan
Medicaid
Principal Life
Providence Health Plans
SelectHealth
Simply Healthcare Plans
Medicaid
Staywell (Wellcare)
Medicaid
Tricare
UnitedHealthCare
Choice Plus POS
Navigate POS
Options PPO
Wellcare of Georgia
Medicaid

Background Check

Healthgrades does not collect malpractice claims information for Idaho
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Practice Areas

Adult Congenital Cardiac Disorders

Adult congenital cardiac disorder specialists diagnose and treat heart disorders, such as arrythmias and mitral valve disease, that have been present from birth to adulthood.

Typically treats 70% more than their peers

Based on claims data for 8 conditions and procedures

TreatmentsTreatment Frequency
Arrhythmias
very high
very high

Treatment Frequency

Dr. Undesser treats Arrhythmias more than 99% of their peers

Dr. Undesser treats this condition more than 99% of their peers

Atrial Fibrillation
very high
very high

Treatment Frequency

Dr. Undesser treats Atrial Fibrillation more than 98% of their peers

Dr. Undesser treats this condition more than 98% of their peers

Atrial Flutter
very high
very high

Treatment Frequency

Dr. Undesser treats Atrial Flutter more than 96% of their peers

Dr. Undesser treats this condition more than 96% of their peers

Implantable Cardiac Devices

Typically treats 56% more than their peers

Based on claims data for 3 conditions and procedures

TreatmentsTreatment Frequency
Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair
high
high

Treatment Frequency

Dr. Undesser performs Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair more than 81% of their peers

Dr. Undesser performs this procedure more than 81% of their peers

Pacemaker Insertion or Replacement
normal
normal

Treatment Frequency

Dr. Undesser performs Pacemaker Insertion or Replacement more than 73% of their peers

Dr. Undesser performs this procedure more than 73% of their peers

Removal or Revision of Pacemaker or Cardioverter and-or Defibrillator
normal
normal

Treatment Frequency

Dr. Undesser performs Removal or Revision of Pacemaker or Cardioverter and-or Defibrillator more than 14% of their peers

Dr. Undesser performs this procedure more than 14% of their peers

Electrophysiology

Electrophysiologists monitor, diagnose and treat abnormal heart rhythms through procedures such as electrocardiograms (EKGs) and pacemaker insertions

Typically treats 61% more than their peers

Based on claims data for 7 conditions and procedures

TreatmentsTreatment Frequency
Tilt Testing or Cardiac Event Monitors
very high
very high

Treatment Frequency

Dr. Undesser performs Tilt Testing or Cardiac Event Monitors more than 95% of their peers

Dr. Undesser performs this procedure more than 95% of their peers

Cardiac Electrophysiology
very high
very high

Treatment Frequency

Dr. Undesser performs Cardiac Electrophysiology more than 91% of their peers

Dr. Undesser performs this procedure more than 91% of their peers

Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair
high
high

Treatment Frequency

Dr. Undesser performs Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair more than 81% of their peers

Dr. Undesser performs this procedure more than 81% of their peers

Cardiac Care

Cardiac care specialists diagnose and treat general cardiac conditions such as high blood pressure, angina, and arrhythmias through procedures including cardiovascular stress tests, ablation therapy, and heart valve surgery.

Typically treats 66% more than their peers

Based on claims data for 17 conditions and procedures

TreatmentsTreatment Frequency
Heart Disease
very high
very high

Treatment Frequency

Dr. Undesser treats Heart Disease more than 100% of their peers

Dr. Undesser treats this condition more than 100% of their peers

Hyperlipidemia
very high
very high

Treatment Frequency

Dr. Undesser treats Hyperlipidemia more than 98% of their peers

Dr. Undesser treats this condition more than 98% of their peers

Hypertension
very high
very high

Treatment Frequency

Dr. Undesser treats Hypertension more than 97% of their peers

Dr. Undesser treats this condition more than 97% of their peers

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Check Dr. Undesser's experience treating your condition or procedure

Dr. Undesser's conditions and procedures:

  • Ablation for Treatment of Cardiac Arrhythmias
  • Aneurysm
  • Aneurysm and Dissection of Heart
  • Angina and Acute Coronary Syndrome
  • Aortic Aneurysm
  • Aortic Ectasia
  • Aortic Stenosis
  • Aortic Valve Disease
  • Aortic Valve Regurgitation
  • Arrhythmias
  • Atrial Fibrillation
  • Atrial Flutter
  • Automatic Implantable Cardioverter Defibrillator (ICD) Implantation
  • Autonomic Disorders
  • Benign Tumor
  • Cardiac Catheterization (incl. Coronary Angiography)
  • Cardiac Electrophysiology
  • Cardiac Imaging
  • Cardiac Myocardial Perfusion Imaging
  • Cardiomegaly
  • Cardiomyopathy
  • Cardiovascular Stress Test
  • Cardioversion, Elective
  • Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair
  • Carotid Artery Disease
  • Chest CT (incl. Heart and Lungs)
  • Chest Pain
  • Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
  • Coarctation of the Aorta
  • Congenital Aortic Valve Disorders
  • Congenital Heart Defects
  • Congenital Heart Disease
  • Congestive Heart Failure
  • Coronary Angioplasty, Atherectomy and Stent
  • Coronary Artery Disease (CAD)
  • Electrophysiological Study
  • Endocarditis
  • Heart Attack (Acute Myocardial Infarction)
  • Heart Disease
  • Heart Murmur
  • Heart Palpitations
  • Heart Surgery
  • Hyperlipidemia
  • Hypertension
  • Hypertensive Chronic Kidney Disease
  • Hypertensive Heart and Chronic Kidney Disease
  • Hypertensive Heart Disease
  • Hypotension
  • Insertion of Left Ventricular Lead for Pacemaker or Cardioverter and-or Defibrillator
  • Limb Swelling Caused by Fluid Overload
  • Marfan Syndrome
  • Mitral Valve Disease
  • Mitral Valve Regurgitation
  • Mitral Valve Stenosis
  • Pacemaker Insertion or Replacement
  • Patent Ductus Arteriosus
  • Pericardial Disease
  • Peripheral Artery Catheterization
  • Pulmonary Disease
  • Pulmonary Edema
  • Pulmonary Hypertension
  • Pulmonary Valve Disease
  • Removal or Revision of Pacemaker or Cardioverter and-or Defibrillator
  • Rheumatic Aortic Valve Disorders
  • Secondary Hypertension
  • Septal Defect
  • Syncope
  • Tetralogy of Fallot
  • Thoracentesis
  • Thrombosis
  • Tilt Testing or Cardiac Event Monitors
  • Tricuspid Valve Disease
  • Vascular Disease
  • Vascular Duplex Ultrasonography and Plethysmography
  • Venous Hypertension

About Me

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 de...

Specialties

  • Cardiology

Board Certifications

  • Cardiovascular Disease
  • Clinical Cardiac Electrophysiology

Education

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

Awards

Frequently Asked Questions

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Affiliated Hospitals

Check the quality of care at hospitals where Dr. Undesser treats patients.

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West Valley Medical Center

Caldwell, ID

77% Patient experience rating, 8% higher than the national average

  • Patient Safety Excellence Award™ (2020, 2019, 2018)

Saint Alphonsus Regional Medical Center

Boise, ID

73% Patient experience rating, 4% higher than the national average

St. Luke's Boise Medical Center

Boise, ID

78% Patient experience rating, 9% higher than the national average

  • America's 250 Best Hospitals Award™ (2020, 2019, 2018)
  • America's 50 Best Hospitals Award™ (2020, 2019, 2018)
  • Outstanding Patient Experience Award™ (2020, 2019)
  • Patient Safety Excellence Award™ (2020)
  • Cardiac Care Excellence Award™ (2019, 2018)
  • Coronary Intervention Excellence Award™ (2019)