Dr. Benjamin Joseph Karsten, MD

Dr. Karsten practices at St. Luke's Boise Medical Center in Boise, Idaho, part of St. Luke's Health System.

Dr. Karsten's NPI, 1124227137, was assigned on July 11, 2007. Dr. Karsten graduated from University of Utah School of Medicine in 2004. Dr. Karsten holds Idaho license M11376.

Dr. Karsten's primary practice is St. Luke's Boise Medical Center, at 190 East Bannock Street, Boise, ID 83712 in Ada County. The practice phone is (208) 381-2222.

Dr. Karsten's primary practice is St. Luke's Boise Medical Center in Boise, Idaho, part of St. Luke's Health System. Dr. Karsten is also affiliated with Saint Alphonsus Regional Medical Center. The medical group on file is St. Luke's Health System. Dmand AI also links Dr. Karsten to 2 more hospitals and 1 breast imaging center, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karsten practices, 5 sites in all. Vendor and product names are available with a free account.

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

CMS data shows 126 Medicare services from Dr. Karsten across 5 procedure codes in 2024, for 117 Medicare patients. Medicare paid $7,930 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 117 Medicare patients who saw Dr. Karsten in 2026. The largest group is 65 to 74, with 63 patients. 64% of them have high blood pressure, and 59% have high cholesterol. 16% 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. Karsten's median patient age at 67, with 54% women.

In 2026, Dr. Karsten wrote 133 Medicare Part D claims for 61 patients. 99% of them were for generic drugs. CMS names the drug for 105 of them, across 2 drugs with 11 or more claims each, at $389 in total drug cost. In 2023, CMS named 87 claims across 2 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Karsten for performance year 2026, reported as part of a group. Dr. Karsten accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Karsten as offering telehealth.

Colonoscopy: 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)

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

CMS Open Payments shows 31 general payments to Dr. Karsten from 10 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 56% of the total. Intuitive Surgical, Inc. paid the most, $2,673.

Dr. Karsten graduated from University of Utah School of Medicine in 2004.