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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 4/9/2021, 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

210 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 4.8
Courtesy, Respect & Concern 5
Patient Rating of Doctor 5

38 Patient Comments

Reviewed on Oct 29, 2021

Always have a good experience with this excellent doctor!

Reviewed on Oct 27, 2021

Dr. Castle and all of his staff are just wonderful

Reviewed on Oct 27, 2021

Dr. Castle is a good doctor and a caring person.

Reviewed on Oct 27, 2021

Love Dr. Castle

Reviewed on Oct 26, 2021

Dr.Castle is highly competent Doctor who has trated me for years and I would highly recommend him to others!

Reviewed on Sep 29, 2021

Dr. Castle was very friendly and informative.

Reviewed on Sep 14, 2021

Dr. Castle and the staff are excellent! Their care and concern are evident!

Reviewed on Sep 13, 2021

Dr Castle has been my cardiologist for over 15 years. He has always been kind, thorough and concerned.Very much like the new 3 day heart monitor system. Much more comfortable than the old method.

Reviewed on Aug 31, 2021

Excellent doctor. Genuine concern for his patient. Nursing staff was friendly and helpful.

Reviewed on Aug 31, 2021

Dr.Lon Castle is an excellent doctor. I have been under his care for over 20 years. He takes time to listen and explain treatment options clearly. He is very knowledgeable and has a lot of experience.

Reviewed on Aug 5, 2021

Dr Castle really cares and explains everything well.

Reviewed on Aug 5, 2021

Dr Castle respects and really cares for his patients.

Reviewed on Jul 30, 2021

Dr. Castle is an exceptional practicioner and a delightful and caring person!

Reviewed on Jul 16, 2021

Great doctor. Couldn't be happier with his care. Very knowledgeable and caring dr. Gives me a peace of mind when I have an appointment.

Reviewed on Jun 29, 2021

Dr Lon Castle is a dedicated kind and caring Doctor!!

Reviewed on Jun 29, 2021

Dr. Castle is great. Always takes time to clearly explain my cardio test results and answer my questions.

Reviewed on May 4, 2021

Great Doctor. Without him I may not be alive today.

Reviewed on May 4, 2021

Dr Castle is always thorough, careful to explain test results and care plan, and doesn't uncomfortably rush the appointment.

Reviewed on May 4, 2021

All of us who have Dr. Castle as our doctor are lucky. He is the very BEST.

Reviewed on Apr 29, 2021

Doctor Castle is the best!

Reviewed on Apr 29, 2021

i love Dr. Castle and his staff. I always feel informed and cared for

Reviewed on Apr 28, 2021

Dr. Lon Castle is certainly one of your most esteemed, knowable, and caring physician. he possesses all the qualities of one considers to be a top notch position the type that we used to have in the old days who really cares about the patient but who is brilliant in his field. We feel very lucky to have him as our doctor and have for a long time. He's always been a 10+ experience each time. You are extremely lucky at the Cleveland clinic to have a man of his abilities and nature.We are most familiar with mayo clinic in Mass General and they're teaching styles and we can really see quality when we know it. Thank you for giving us the opportunity to work and have such a wonderful person as a physician to a number of very very lucky patients.

Reviewed on Apr 28, 2021

Dr. Castle is one if the finest physicians I have had the privilege to know! His assistants are excellent!

Reviewed on Apr 15, 2021

love Dr. Castle. very thorough

Reviewed on Apr 2, 2021

Amazing doctor

Reviewed on Mar 25, 2021

Good doctor.

Reviewed on Mar 16, 2021

Dr. Castle, is wonderful. He takes his time explaining my concerns and is willing give details that I can understand. He is great. If this evaluation goes to him please indicate how much I appreciate him.

Reviewed on Mar 1, 2021

Dr. Castle is a caring, non- alarmist cardiologist. He has kept this spring chicken in great heart health

Reviewed on Feb 17, 2021

Dr. Castle is an excellent doctor and I would recommend him to anyone

Reviewed on Jan 29, 2021

Dr Castle is the Best

Reviewed on Jan 27, 2021

Dr. Castle is terrific.

Reviewed on Jan 26, 2021

Dr Castle is always a pleasure

Reviewed on Jan 13, 2021

dr. castle is so relatable and so very kind to my son, I'm so glad we found him and his entire team, everyone is so very sweet and patient, thank you!

Reviewed on Jan 12, 2021

Dr Castle and his team are great....rock stars.

Reviewed on Jan 11, 2021

had bad experiences with Cleveland Cliinic cardiologists until I met Dr. Castile. He listened and today I have a doctor I respect and trust .

Reviewed on Jan 11, 2021

I have been to Cleveland Cardiologists for many years..and saw four different doctors.. one took my problem seriously till I met D. Castle. I feel confident he understands my problem and will continue to help me. my life has changed... my anxiety level has changed..i am no longer afraid because I have someone that treats me with respect and will help me.

Reviewed on Dec 1, 2020

Dr. Castle always explains things in an easy to understand way.

Reviewed on Nov 16, 2020

Dr. Castle always takes the time to thoroughly explain my test results and discuss any health care topics that I have. I have high confidence in his ability and find him to be the best of all of my care physicians. I very much appreciate the fact that he takes the time to recommend the right resource to address my non-cardio issues, unlike the nurse practitioner in my family doctor's office who sent me to a general surgeon for my thyroid issue rather than connecting me to an appropriate endocrinologist. Dr. Castle's office responded quickly to my request for an appropriate resource (Dr. Lashin) to address my thyroid problem.

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