alert icon Coronavirus

Now scheduling COVID-19 vaccine appointments for ages 12+
Schedule a vaccine appointment
COVID-19 vaccine FAQs

Going to a Cleveland Clinic location?
New visitation hours
Masks are required for patients and visitors (even if you're vaccinated)

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 +


Is Cleveland Clinic Part of Your Insurance?

Review a list of accepted insurance plans for our Northeast Ohio locations or learn more about purchasing a contracted managed care plan.

View All Plans

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

237 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 4.9
Courtesy, Respect & Concern 5
Patient Rating of Doctor 5

53 Patient Comments

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

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

Reviewed on Apr 29, 2021

Doctor Castle is the best!

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.

Reviewed on Nov 2, 2020

I do not feel like "another number". I appreciate my professional relationship with Dr. Castle.

Reviewed on Oct 27, 2020


Reviewed on Oct 13, 2020

Dr Castle is very thorough, caring and respectful. He always takes his time and doesn't make you feel as though he's hurried.

Reviewed on Oct 13, 2020

I had three appointments:an echo, stress test and doc appt. The staff was very aware of the timing of all three and worked to make sure I didn't have to wait unnecessarily. VERY much appreciated.

Reviewed on Sep 17, 2020

I,s always a good experience when I go to see Dr Castle. He,s knowledgeable, very professional, yet he cares about you as a person.

Reviewed on Sep 16, 2020

Dr. Castle has kept me alive with his care. He keeps me very informed. I will go no where else.

Reviewed on Sep 11, 2020

Dr. Castle is the best ! I have the utmost confidence in him.

Reviewed on Sep 11, 2020

Dr. Castle is very thorough and always professional and courteous. He is very good about explaining things also.

Reviewed on Sep 9, 2020

Dr. Castle always listens to my concerns & offers good advice.

Reviewed on Sep 3, 2020

Dr. Castle is an absolutely wonderful physician.

Reviewed on Sep 3, 2020

All good. I see Dr. Castle every 6 months so his staff makes the appointments for me when I am ready to leave!

Reviewed on Sep 1, 2020

Dr. Castle has been my cardiologist for over 50 years and is the kindest person I know.

Reviewed on Sep 1, 2020

dr. castle is the best

Reviewed on Aug 17, 2020

dr castle is a wonderful doctor. I have been with him around forty years. can't say enough good things about him

Reviewed on Aug 17, 2020

DR. Castle was excellent as usual.

Reviewed on Aug 13, 2020

excellent doctor and excellent care

Reviewed on Aug 11, 2020

Dr. Castle is great. He was patient. Took the time to answer ally questions. He made me feel as if no question was trivial. He showed me the results of my tests. I feel lucky to have found him.

Reviewed on Jul 16, 2020

castle is a outstanding doctor

Reviewed on Jul 15, 2020

Dr Castle is a very caring and knowledgeable doctor who is great at putting me at ease and explaining everything.

Reviewed on Jul 14, 2020

Thankful for call from nurse to collect data prior to Dr. Castle's call.

Reviewed on Jul 14, 2020

Dr. Castle has successfully provided life quality care to my mother.

Reviewed on Jul 14, 2020

excellent. great doctor. he's my first cardiologist since 2005 still the same very good advice and diagnosis

Reviewed on Jul 14, 2020

great to be treated by a world class doctor

Reviewed on Jul 13, 2020

Doctors and staff are always kind and helpful.

Reviewed on Jul 1, 2020

Dr Castle is a very good person and Doctor

Reviewed on Jun 18, 2020


Reviewed on Jun 17, 2020

Dr. Castle is the very best and the only reason that I am alive.

Reviewed on Jun 3, 2020

Dr. Castle always provides personal, compassionate and informed care.

Reviewed on Jun 2, 2020

Dr. Castle is such a wonderful employee and physician I am my whole family feel so grateful that he is my doctor. He is wise yet has an ability to really listen and do what's best. He's able to give a great measure of trust it is always there to help when someone is in need. I am so happy that he has my physician.

Reviewed on Jun 2, 2020

Of course there is nothing like the real thing. Although video conferencing was terrific. You get a certain feeling of being there with someone and looking at them I don't mind. Dr. Cassels one of them you just have a certain rapport with him immediately and although he's wonderful in every way even hundred videos circumstances there's nothing like seeing him in person and listening to all his wisdom.

Reviewed on Jun 2, 2020

Dr. Castle is great

Related Videos Featuring Lon Castle, MD

Related Videos Featuring Lon Castle, MD

Back to Top