Dr. Thomas Daniel Callahan V, MD

Dr. Callahan practices at Cleveland Clinic Main Campus in Cleveland, Ohio, part of The Cleveland Clinic Foundation.

Dr. Callahan's NPI, 1023004520, was assigned on September 21, 2005. Dr. Callahan graduated from Macon & Joan Brock Virginia Health Sciences Eastern Virginia Medical School in 1999. Dr. Callahan holds Ohio license 35082810.

Dr. Callahan's primary practice is Cleveland Clinic Main Campus, at 9500 Euclid Avenue, Cleveland, OH 44195 in Cuyahoga County. The practice phone is (216) 952-9829.

Dr. Callahan's primary practice is Cleveland Clinic Main Campus in Cleveland, Ohio, part of The Cleveland Clinic Foundation. Dr. Callahan is also affiliated with Hillcrest Hospital. The medical group on file is Cleveland Clinic. Dmand AI also links Dr. Callahan to 3 more hospitals, 2 clinical labs and 1 medical group, each named with a free account. Dr. Callahan's employer is on file too: a hospital.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Callahan practices, 7 sites in all. Vendor and product names are available with a free account.

Clinical cardiac electrophysiology is Dr. Callahan's primary specialty in the NPI Registry, under taxonomy code 207RC0001X. Dr. Callahan is board certified in cardiovascular disease by the American Board of Internal Medicine. Dmand AI has Dr. Callahan's licenses on file in 3 states: Ohio, New Jersey and Pennsylvania.

Dmand AI lists atrial fibrillation and flutter, cardiac arrhythmia, heart blockage, intermittent racing heartbeat (PSVT), pacemaker or defibrillator implantation, pacemaker replacement, sick sinus syndrome and ventricular tachycardia among the conditions Dr. Callahan treats.

CMS data shows 1,777 Medicare services from Dr. Callahan across 26 procedure codes in 2024, for 723 Medicare patients. Medicare paid $84,763 for them.

CMS counts 723 Medicare patients who saw Dr. Callahan in 2024. The largest group is 75 to 84, with 318 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 4% are also on Medicaid. Their average risk score is 1.86, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Callahan's median patient age at 69, with 46% women.

In 2024, Dr. Callahan wrote 1,300 Medicare Part D claims for 300 patients. 63% of them were for generic drugs. CMS names the drug for 1,180 of them, across 19 drugs with 11 or more claims each, at $553,884 in total drug cost. In 2023, CMS named 1,230 claims across 18 drugs.

Dr. Callahan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Callahan as offering telehealth. CMS counts 46 procedures of pacemaker insertion or repair by Dr. Callahan, more than 88% of the clinicians it reports for that procedure.

Dmand AI links 69 papers to Dr. Callahan, published from 2007 to 2025. 2024 was the busiest year, with 12. The most frequent topics are Atrial Fibrillation, Catheter Ablation and Pacemaker, Artificial. Dr. Callahan has published most often in Heart Rhythm. Dr. Callahan's most frequent co-authors are Thomas Dee Callahan, MD, Thomas J. Dresing, MD and Mandeep Bhargava, MD.

CMS Open Payments shows 225 general payments to Dr. Callahan from 10 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 47% of the total. Philips Electronics North America Corporation paid the most, $50,727.

Dmand AI lists 3 awards for Dr. Callahan, most recently CMS Stage 1 EHR in 2013.

Dr. Callahan graduated from Macon & Joan Brock Virginia Health Sciences Eastern Virginia Medical School in 1999. Dr. Callahan is a member of ACC and Heart Rhythm Society.

Dr. Callahan is in network with 20 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 13. Check the plan with the practice before a visit.