Dr. Gregory Scott Day, MD

Dr. Day practices at Mayo Clinic Hospital in Jacksonville, Florida, part of Mayo Clinic.

Dr. Day's NPI, 1962880757, was assigned on May 12, 2015. Dr. Day graduated from Queen's University at Kingston in 2009. Dr. Day holds Florida license ME142966.

Dr. Day's primary practice is Mayo Clinic Hospital, at 4500 San Pablo Rd, Jacksonville, FL 32224 in Duval County. The practice phone is (904) 953-2000.

Dr. Day's primary practice is Mayo Clinic Hospital in Jacksonville, Florida, part of Mayo Clinic. The medical group on file is Mayo Clinic Jacksonville.

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

Neurology is Dr. Day's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Day is board certified in neurology by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Day's licenses on file in 2 states: Florida and Missouri.

Dmand AI lists alzheimer's disease, non-alzheimer's dementia (chronic) and sleep apnea among the conditions Dr. Day treats.

CMS data shows 323 Medicare services from Dr. Day across 7 procedure codes in 2024, for 207 Medicare patients. Medicare paid $31,573 for them. Every service was in an office.

CMS counts 207 Medicare patients who saw Dr. Day in 2024. The largest group is 75 to 84, with 101 patients. 75% of them have high cholesterol, and 71% have alzheimer's and dementia. Their average risk score is 1.49, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Day's median patient age at 74, with 51% women.

In 2024, Dr. Day wrote 250 Medicare Part D claims for 73 patients. 99% of them were for generic drugs. CMS names the drug for 223 of them, across 6 drugs with 11 or more claims each, at $9,875 in total drug cost. In 2023, CMS named 253 claims across 5 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 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.

Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 173 papers to Dr. Day, published from 2009 to 2025. 2023 was the busiest year, with 36. The most frequent topics are Alzheimer Disease, Magnetic Resonance Imaging and Positron-Emission Tomography. Dr. Day has published most often in Neurology. Dr. Day's most frequent co-authors are Neill Raoul Graff-Radford, MD, Eric Martin McDade, DO and David T. Jones, MD.

Dmand AI links Dr. Day to 4 clinical trials. 3 are still active or recruiting. Conditions studied include Cognitive Dysfunction, Encephalitis and Pick Disease of the Brain.

CMS Open Payments shows 14 general payments to Dr. Day from 6 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 56% of the total. Eli Lilly and Company paid the most, $5,352.

Dr. Day graduated from Queen's University at Kingston in 2009. Dr. Day is a member of AAN.

Dr. Day is in network with 10 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.