Dr. Kathriena Loreanna Greenwell, MD

Dr. Greenwell practices at Gundersen Lutheran Onalaska Clinic in Onalaska, Wisconsin.

Dr. Greenwell's NPI, 1215382411, was assigned on April 26, 2016. Dr. Greenwell holds Minnesota license 22994.

Dr. Greenwell's primary practice is Gundersen Lutheran Onalaska Clinic, at 3111 Gundersen Dr, Onalaska, WI 54650 in La Crosse County. The practice phone is (608) 775-8025.

Dr. Greenwell's primary practice is Gundersen Lutheran Onalaska Clinic in Onalaska, Wisconsin. Dr. Greenwell is also affiliated with Gundersen Lutheran Medical Center. The medical group on file is Gundersen Lutheran Medical Center. Dmand AI also links Dr. Greenwell to 1 more group practice or clinic and 1 medical group, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greenwell practices, 2 sites in all. Vendor and product names are available with a free account.

Surgery is Dr. Greenwell's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Greenwell's licenses on file in 2 states: Minnesota and Ohio.

CMS data shows 150 Medicare services from Dr. Greenwell across 8 procedure codes in 2024, for 117 Medicare patients. Medicare paid $26,847 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 117 Medicare patients who saw Dr. Greenwell in 2024. The largest group is 65 to 74, with 52 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 18% are also on Medicaid. Their average risk score is 1.66, 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. Greenwell's median patient age at 58, with 60% women.

In 2024, Dr. Greenwell wrote 117 Medicare Part D claims for 45 patients. 99% of them were for generic drugs. CMS names the drug for 63 of them, across 4 drugs with 11 or more claims each, at $1,272 in total drug cost. In 2023, CMS named 55 claims across 3 drugs.

Dr. Greenwell accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

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

Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)

Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)

Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)

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

Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 1 paper to Dr. Greenwell. Dr. Greenwell's most frequent co-authors are William J. Crump, MD and Katelyn F. Flick, MD.

CMS Open Payments shows 37 general payments to Dr. Greenwell from 12 drug and device companies from 2017 to 2025. Travel and lodging make up the largest share, 55% of the total. Intuitive Surgical, Inc. paid the most, $4,211.