Physician

Kathryn A. Kiehn, M.D.

According to 2025 Medicare claims, Kathryn Kiehn, M.D. (NPI: 1700834348) practices rheumatology in the Lake County, IL market, with the plurality of this provider's patient population coming from Lake, IL. This provider's primary affiliated billing organization is NORTHWESTERN MEDICAL FACULTY FOUNDATION (NPI: 1346235314; TIN: 363097297) and primary practice location at 60030-2012. Kiehn is affiliated with the Northwestern Medicine Physician Network ACO (ACO ID: A2620), participating under the MSSP model.

Kiehn's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 574 traditional Medicare patients, billed 111,457 HCPCS/CPT codes, and received $1,475,406 in Medicare payments. The top billing code was 99214 (Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more). Part D data shows 1,550 prescription claims across 266 beneficiaries totaling $1,330,895 in drug costs, led by Enbrel Sureclick (Etanercept). Open Payments data shows 1 records totaling $86. You can download detailed data with all billing codes (2015-2024). For more recent data, please contact us.

Over the past 10 years, this provider's Medicare Part B carrier billing has risen steadily, from $77,452 to $1,475,406. Similarly, Part D prescription costs have moved sharply higher in recent years, from $69,549 to $1,330,895. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.