Dr. Erin Jo Mercer Terpstra, MD, PhD

Dr. Terpstra practices at Sanford Medical Center - Unit in Sioux Falls, South Dakota.

Dr. Terpstra's NPI, 1366005662, was assigned on April 22, 2019. Dr. Terpstra holds South Dakota license 13919.

Dr. Terpstra's primary practice is Sanford Medical Center - Unit, at 1305 W 18th Street, Sioux Falls, SD 57117 in Minnehaha County. The practice phone is (605) 328-6758.

Dr. Terpstra's primary practice is Sanford Medical Center - Unit in Sioux Falls, South Dakota. Dr. Terpstra is also affiliated with Sanford USD Medical Center. The medical group on file is Edith Sanford Breast Center Sioux Falls. Dmand AI also links Dr. Terpstra to 4 more hospitals, 3 home health agencies, 1 dialysis center and 1 imaging center, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Terpstra practices, 11 sites in all. Vendor and product names are available with a free account.

Internal medicine is Dr. Terpstra's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Terpstra is licensed in South Dakota.

CMS data shows 939 Medicare services from Dr. Terpstra across 6 procedure codes in 2024, for 207 Medicare patients. Medicare paid $40,727 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 207 Medicare patients who saw Dr. Terpstra in 2024. The largest group is 65 to 74, with 108 patients. 75% of them have high cholesterol, and 71% have high blood pressure. Their average risk score is 1.08, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Terpstra's median patient age at 74, with 78% women.

In 2024, Dr. Terpstra wrote 4,427 Medicare Part D claims for 413 patients. 91% of them were for generic drugs. CMS names the drug for 3,745 of them, across 93 drugs with 11 or more claims each, at $160,615 in total drug cost. In 2023, CMS named 1,424 claims across 47 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Dr. Terpstra for performance year 2024, reported as part of a group. Dr. Terpstra accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

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

Dmand AI links 6 papers to Dr. Terpstra, published from 2012 to 2017. Dr. Terpstra's most frequent co-authors are David Kass, MD, Jie Li and Sean Pickthorn.

CMS Open Payments shows 9 general payments to Dr. Terpstra from 6 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $69.