Dr. Marcus Greatens, MD

Dr. Greatens practices at Mayo Clinic Health System in Eau Claire in Eau Claire, Wisconsin, part of Mayo Clinic.

Dr. Greatens' NPI, 1538570411, was assigned on May 14, 2014. Dr. Greatens holds Wisconsin license 73594.

Dr. Greatens' primary practice is Mayo Clinic Health System in Eau Claire, at 1221 Whipple St, Eau Claire, WI 54703 in Eau Claire County. The practice phone is (715) 838-3311.

Dr. Greatens' primary practice is Mayo Clinic Health System in Eau Claire in Eau Claire, Wisconsin, part of Mayo Clinic. Dr. Greatens is also affiliated with Mayo Clinic Health System in Menomonie. The medical group on file is Mayo Clinic Health System in Eau Claire. Dmand AI also links Dr. Greatens to 3 more hospitals and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greatens practices, 6 sites in all. Vendor and product names are available with a free account.

Orthopaedic surgery is Dr. Greatens' primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Greatens' licenses on file in 4 states: Wisconsin, Colorado, Michigan and Minnesota.

CMS data shows 540 Medicare services from Dr. Greatens across 9 procedure codes in 2024, for 326 Medicare patients. Medicare paid $107,246 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 326 Medicare patients who saw Dr. Greatens in 2024. The largest group is 65 to 74, with 165 patients. 75% of them have arthritis, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.12, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Greatens' median patient age at 75, with 55% women.

In 2024, Dr. Greatens wrote 304 Medicare Part D claims for 153 patients. 97% of them were for generic drugs. CMS names the drug for 252 of them, across 5 drugs with 11 or more claims each, at $687 in total drug cost. In 2023, CMS named 123 claims across 2 drugs.

Dr. Greatens accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 80 procedures of knee replacement by Dr. Greatens, more than 89% of the clinicians it reports for that procedure.

Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 3 papers to Dr. Greatens, published from 2014 to 2025. Dr. Greatens' most frequent co-authors are Geoffrey S. Baer, MD, Tyler Ray Freeman, MD and Craig Hogan, MD.

CMS Open Payments shows 91 general payments to Dr. Greatens from 6 drug and device companies from 2019 to 2025. Education make up the largest share, 66% of the total. Smith & Nephew, Inc. paid the most, $18,500.