Dr. John D. Day, MD

Dr. Day practices at St. Mark's Hospital in Salt Lake City, Utah, part of HCA Healthcare.

Dr. Day's NPI, 1811965122, was assigned on March 11, 2006. Dr. Day graduated from The Johns Hopkins University School of Medicine in 1995. Dr. Day holds Utah license 4849787-1205.

Dr. Day's primary practice is St. Mark's Hospital, at 1200 East 3900 South, Salt Lake City, UT 84124 in Salt Lake County. The practice phone is (801) 268-7111.

Dr. Day's primary practice is St. Mark's Hospital in Salt Lake City, Utah, part of HCA Healthcare. The medical group on file is Heart Center at St. Mark's. Dmand AI also links Dr. Day to 2 more group practices and clinics and 1 medical group, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Day practices, 3 sites in all. Vendor and product names are available with a free account.

Clinical cardiac electrophysiology is Dr. Day's primary specialty in the NPI Registry, under taxonomy code 207RC0001X. Dr. Day is board certified in cardiovascular disease by the American Board of Internal Medicine. Dmand AI has Dr. Day's licenses on file in 4 states: Utah, California, Idaho and Wyoming.

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. Day treats.

CMS data shows 3,823 Medicare services from Dr. Day across 25 procedure codes in 2024, for 729 Medicare patients. Medicare paid $346,023 for them.

CMS counts 729 Medicare patients who saw Dr. Day in 2024. The largest group is 75 to 84, with 302 patients. 75% of them have atrial fibrillation, and 75% have high blood pressure. 3% are also on Medicaid. Their average risk score is 1.47, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Day's median patient age at 75, with 45% women.

In 2024, Dr. Day wrote 718 Medicare Part D claims for 268 patients. 71% of them were for generic drugs. CMS names the drug for 600 of them, across 12 drugs with 11 or more claims each, at $224,681 in total drug cost. In 2023, CMS named 554 claims across 12 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Day for performance year 2024, reported as part of a group. Dr. Day accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Day as offering telehealth. CMS counts 18 procedures of pacemaker insertion or repair by Dr. Day, more than 69% of the clinicians it reports for that procedure.

Dmand AI links 129 papers to Dr. Day, published from 2006 to 2023. 2017 was the busiest year, with 9. The most frequent topics are Atrial Fibrillation, Catheter Ablation and Heart Failure. Dr. Day has published most often in J Cardiovasc Electrophysiol. Dr. Day's most frequent co-authors are Thomas J. Bunch, MD, Jeffrey L. Anderson, MD and Brian G. Crandall, MD.

Dmand AI links Dr. Day to 1 clinical trial. Conditions studied include Atrial Fibrillation and Arrhythmias, Cardiac.

CMS Open Payments shows 784 general payments to Dr. Day from 24 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 66% of the total. Abbott Laboratories paid the most, $260,701.

Dmand AI lists 8 awards for Dr. Day, most recently International Friendship Award in 2012.

Dr. Day graduated from The Johns Hopkins University School of Medicine in 1995. Dr. Day is a member of ACC.

Dr. Day is in network with 18 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.