Department Cardiovascular Medicine
Primary Location Avon - Richard E. Jacobs Health Center
Type of Doctor Adults Only
Languages English
Surgeon No
Locations Specialties & Treatments

Treatment & Services

  • Cardiac Electrophysiology & Pacing Section
  • Cardiovascular Medicine Department
  • Regional Heart and Vascular
  • Sports Cardiology Center
View all 4 Treatment & Services +


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About Lon Castle, MD

Lon Castle, MD, is a Staff Electrophysiologist with Cleveland Clinic. He is Head of the Cardiac Device Lab at Lakewood Hospital and Fairview General Hospital. He also serves as a medical consultant to the National Football League. Dr. Castle is board-certified in internal medicine and cardiovascular disease and is a Diplomate of the Board of Medical Examiners. His specialty interests focus on implanting devices that correct heart rhythm malfunctions and electrophysiologic studies and ablations of cardiac arrythmias.

A Pennsylvania native, Dr. Castle attended Temple University as an undergraduate in the School of Pharmacy, continuing on to receive his medical degree. He completed his clinical internship and residency at the Geisinger Medical Center in Danville, Pa., before joining the United States Air Force. During his military service, Dr. Castle served as Chief of Medicine at Little Rock Air Force Base in Arkansas. Upon leaving military service, Dr. Castle received a fellowship in cardiology from Cleveland Clinic, where he became Head of the Section of Cardiac Pacing and Electrophysiology. Dr. Castle was originally appointed to Cleveland Clinic in 1973. After a four-year absence, he was re-appointed to the Cleveland Clinic in 1998.

Dr. Castle currently serves as an abstract reviewer for the professional journals Pacing and Clinical Electrophysiology. He has been widely published in such journals as American Heart Journal, Journal of Electrophysiology and Clinical Progress in Pacing and Electrophysiology. In addition to his current role as medical consultant to the National Football League, Dr. Castle has been a past medical consultant for the Cleveland Indians, Cleveland Cavaliers and the Cleveland Ballet, and he served as Associate Team Physician for the Cleveland Browns.

Dr. Castle is a Fellow in the American College of Cardiology. He is a member of the North American Society of Pacing and Electrophysiology, the American Medical Association Diagnostic and Therapeutic Technology Assessment Board, the Cleveland Academy of Medicine, the Ohio State Medical Association and the Northeast Ohio Pacemaker Society.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic
Cleveland, OH USA

Residency - Geisinger Medical Center
Danville, PA USA

Internship - Geisinger Medical Center
Danville, PA USA

Medical Education - Temple University School of Medicine
Philadelphia, PA USA

Undergraduate - Temple University
Philadelphia, PA USA


  • Internal Medicine
  • Internal Medicine - Cardiovascular Disease

Specialty Interests

cardiac arrhythmias, device implantation, electrophysiologic studies and ablation of arrhythmias

Research & Publications

Research & Publications

See publications for Lon Castle, MD.

(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 5/17/2020, Dr. Castle has reported no financial relationship with industry that is applicable to this listing. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

Patient Satisfaction Reviews

264 Patient Satisfaction Reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Cleveland Clinic.

Overall Star Ratings
5 out of 5
Explains 4.9
Listens 5
Courtesy, Respect & Concern 5
Patient Rating of Doctor 5

47 Patient Comments

Reviewed on Feb 19, 2020

Dr Castle spends as much time as I need to answer any questions I have and makes sure I understand my options.

Reviewed on Feb 19, 2020

I have recommended Dr Castle to multiple people for care

Reviewed on Jan 20, 2020

The Cardio Department at Fairview is the best I've ever experienced. Dr. Castle is exceptional and has all of my confidence.

Reviewed on Jan 16, 2020

Dr. Lon Castle is the best! He did my cardio version in May. Believe it or not I look forward to my next visit in July!

Reviewed on Jan 3, 2020

Dr. Castle was excellent.

Reviewed on Jan 3, 2020

First time visit with Dr. Castle and we were very please with his attention to detail, his comments and information.

Reviewed on Dec 19, 2019

Dr. Castle is so very kind and concerned. He is a great Doctor and a great person!

Reviewed on Dec 19, 2019

Dr. Castle always has his patients best interest at heart. I absolutely support is use if "the patch" for monitoring the heart as opposed to the archaic holster monitor. my 92 year old mom loves the fact that there are no wires!

Reviewed on Dec 5, 2019

Dr. Castle is great but his office does not answer calls.

Reviewed on Nov 14, 2019

Been with the Care provider 40 years best Dr. in his field

Reviewed on Nov 11, 2019

I consider myself very fortunate to be under the care of Dr. Lon Castle. It's also my personal feelings that CCF is very fortunate to have Dr. Castle on their staff. He is the absolute best there is

Reviewed on Oct 30, 2019

Dr. Castle is extremely professional and the best cardiologist!

Reviewed on Oct 30, 2019

Dr. Castle is always courteous and friendly. I had no questions, so I skipped that one. He is very thorough in explaining my test results, prognosis, etc.

Reviewed on Oct 29, 2019

Always a great experience with Dr. Castle

Reviewed on Oct 10, 2019

Dr. Castle is always caring. He provides explanations of all aspects of my health care. I would highly recommend him.

Reviewed on Oct 9, 2019

I love Dr. Castle, I travel 45 minutes 2 times a year unless I have a problem. I only do this because I've been seeing him for many years and I will travel anywhere to see him. He is a very good doctor and when the time comes for him to retire. CCF will be loosing one of the BEST!

Reviewed on Oct 3, 2019

Dr.Lon Castle is a highly competent Cardiologist whom I have had the privelege of having as my doctor for some 12 + years.I would unhesitatingly recommend Dr.Castle to other people seeking a Cardiologist.

Reviewed on Oct 2, 2019

Couldn't ask for a better care provider!

Reviewed on Sep 19, 2019

The Staff is excellent and let my doctor know everything I said to them before I saw him.

Reviewed on Sep 18, 2019

Dr. Castle is the best ESP. Cardiologist.Yes, I recommend him to everyone looking for a cardiologist. Because his is the BEST.

Reviewed on Sep 17, 2019

dr castlle and stastaff ll very helpful and friendly

Reviewed on Aug 26, 2019

Dr Castle is the best

Reviewed on Aug 26, 2019

can't say enough good about Dr Castle care, concern,and professionalism. I wouldn't want anyone else taking my needs and care.

Reviewed on Aug 8, 2019

Dr. Castle is exceptional in the way in which she delivers care. I always feel informed and secure.

Reviewed on Jul 18, 2019

Awesome experience. Dr. Castle makes a patient feel comfortable. he is knowledgeable and cares about his patients.

Reviewed on Jul 16, 2019

This appointment like all the other appointments with Dr. Castle left me knowing that I am well cared for. I can count my blessings that for my age I am very healthy. I thank God for Dr. Castle and other Clinic Doctors whom I can count on to keep me healthy and informed about my health.

Reviewed on Jun 20, 2019

Dr. Castle is an excellent doctor. He completely focuses his attention on his patient and listens intently to any concerns or problems and has answers to any questions, and is very helpful and reassuring. He makes it very easy and comfortable to talk to him.

Reviewed on Jun 18, 2019

great confidence in dr castle many years in his care always concerned about all my medical problems

Reviewed on Jun 17, 2019

My experience with Dr. Castle was excellent. He is very caring and considerate.

Reviewed on Jun 11, 2019

Dr Castle was friendly and informative and took alot of time

Reviewed on Jun 6, 2019

I have always had a good experience at Dr. Castle's Office not only with a great doc but the staff as well. !!!!

Reviewed on Jun 6, 2019

They have always listened to my concerns and when Dr C . comes in he already has already been told !

Reviewed on May 29, 2019

*Dr. Castle is always understanding & understandable. He makes sure that the patient knows what their current status, testing, & results show & what has been ordeal for future treatment.

Reviewed on May 13, 2019

Dr. Castle is the most caring n understanding Dr. He listens to all n any care and concerns you may have

Reviewed on May 3, 2019

Our experience was what we expected, the staff was very friendly,courteous and professional. Dr Lon Castle and his staff are compassionate.

Reviewed on Apr 29, 2019

Dr. Castle provides care and concern in the most professional manner!!

Reviewed on Apr 29, 2019

Dr. Castle is a compassionate and respectful professional, with a warm and engaging personality. His medical intelligence and insight is second to none. Our experience with him is always very positive.

Reviewed on Apr 17, 2019

Dr. Castle was excellent

Reviewed on Apr 16, 2019

very good DR castle is a very good Dr. plus a great person

Reviewed on Apr 16, 2019

Dr Castle is a consummate professional in his field, likely the best and most knowledgeable in the country.

Reviewed on Apr 3, 2019

Dr. Lon Castle is a very caring doctor, and so is his staff. I live 45 minutes that I drive just to go and see him which I will do until he retires. Which will be a sad day for me.

Reviewed on Feb 25, 2019

Excellent doctor!

Reviewed on Feb 25, 2019

Love everything about the clinic. All of my doctors are great!

Reviewed on Feb 8, 2019

I appreciate the fact that not only Dr. Castle, but all his staff take the time to talk to you.

Reviewed on Feb 7, 2019

Dr. Castle is very professional & encourages questions. Takes time to explain procedures.

Reviewed on Feb 5, 2019

Dr. Castle is always concerned about my health and concerns. Keeps you entertained too!

Reviewed on Feb 1, 2019

Dr. Castle was affable, caring and extremely concerned about my condition. He validated my concerns and let me know that I was justified in being concerned about my heart health.

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