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

Avon - Richard E. Jacobs Health Center


Additional Locations

Specialties & Treatments

Treatment & Services

  • Cardiac Electrophysiology
  • Cardiac Electrophysiology & Pacing Section
  • Cardiovascular Medicine
  • Cardiovascular Medicine Department
  • Regional Heart and Vascular
  • Sports Cardiology Center
View all 6 Treatment & Services +


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About Lon Castle, MD

Lon Castle, MD, is a Staff Electrophysiologist with Cleveland Clinic. Dr. Castle is a fellow of the Heart Rhythm society. . 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  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 Heart and Rhythm Society, Fellow of  American College of Cardiology, 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 4/6/2022, 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

165 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 5
Listens 5
Courtesy, Respect & Concern 5
Patient Rating of Doctor 5

27 Patient Comments

Reviewed on Dec 28, 2022

Dr. Castle is EXCELLENT!!!! I have been seeing him for 14+ years and hope that he will NOT retire soon. He has ALWAYS been there for me. Couldn't ask for a better doctor/patient relationship!!

Reviewed on Dec 27, 2022

Always a good and complete understanding of what is my condition and what I need to do to stay healthy.I consider Dr Castle the best.

Reviewed on Dec 27, 2022

I have the BEST Dr. And his staff that anyone in my condition can have.

Reviewed on Dec 27, 2022

Dr. Castle is professional yet down to earth. He relates well & explains things clearly so a person without a medical degree can understand.

Reviewed on Nov 17, 2022

Could not align Dr. Castle and Dr. Angel on the same day.

Reviewed on Nov 4, 2022

Dr. Tan is exceptionally caring and thorough.

Reviewed on Nov 3, 2022

Dr. Castle is the very best doctor I have ever had, and I am 73.

Reviewed on Nov 1, 2022

Dr Castle is amazing

Reviewed on Oct 19, 2022

Dr Castle is very good at his job!

Reviewed on Oct 17, 2022

Dr. Lon Castle has always been an extremely caring, involved physician. He has treated both my husband and myself for years and consistently offers the best advice for the situation. We highly value his knowledge and have total confidence in his care.

Reviewed on Oct 7, 2022

Dr. Castle has always been informative regarding any issues I may have & has an explanation to help me understand

Reviewed on Oct 6, 2022

Dr Castle is a very good listener! He provided answers to all the questions that I had. He is definitely an encourager and makes sure I understand how things are going with my heart. A very nice person in the bargain.!

Reviewed on Sep 28, 2022

Excellent doctor

Reviewed on Sep 13, 2022

Dr. Castle is the BEST.

Reviewed on Aug 29, 2022

I really like Dr Castle. I feel comfortable with him. He explained results of tests clearly & answered any questions I had in detail

Reviewed on Aug 2, 2022

Message my doctor on Mychart seems the best and easiest way to reach Dr. Castle and his cardiology group at Cleveland Clinic Avon. His group responds very promptly.

Reviewed on Aug 2, 2022

Dr. Castle has been my cardiologist for many years. He is always so pleasant, calm and understanding. If the news is not great, he has made it possible to address an issue with good outcomes. I am so thankful for all he has done for me.Must say he is the best dressed cardiologist in the Cleveland Clinic.

Reviewed on Jun 3, 2022

Dr Castle always makes me feel as if l am his only patient. He is the best of the best without a doubt. He listens to my concerns/issues, gives options for care and answers all questions without rushing out of the room to the next patient. He is very knowledgeable and caring.

Reviewed on May 31, 2022

I am very fortunate to be in the care of dr castle and staff

Reviewed on May 4, 2022


Reviewed on Apr 29, 2022

Excellent! Doctor Castle is the best.

Reviewed on Mar 14, 2022

I have great respect for Dr. Castle. He has helped me through this diagnosis of Afib. He is cordial, treats me with respect, explains treatment and takes time to address concerns.

Reviewed on Feb 16, 2022

Dr castle and his nurse are the best.

Reviewed on Feb 16, 2022

Dr Castle is great

Reviewed on Feb 1, 2022

I was treated very well and professionally by my provider

Reviewed on Jan 31, 2022

Dr. Lon Castle is the best of the best. He treats you as if you are his only patient.

Reviewed on Jan 20, 2022

Excellent physician- Listens and respondsTo the question.

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