Physician

James Steven Marks, M.D.

According to 2025 Medicare claims, James Marks, M.D. (NPI: 1841305018) practices neuropsychiatry 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 NEUROPSYCHIATRIC ASSOCIATES OF IL SC (NPI: 1255349411; TIN: 363312304) and primary practice location at 60061-1429.

Marks' data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 144 traditional Medicare patients, billed 633 HCPCS/CPT codes, and received $56,063 in Medicare payments. The top billing code was 99213 (Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more). Part D data shows 2,820 prescription claims across 213 beneficiaries totaling $156,423 in drug costs, led by Rexulti (Brexpiprazole). Open Payments data shows 4 records totaling $2,168. 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 moved from a lower plateau to a higher plateau, from $19,194 to $56,063. Concurrently, Part D prescription costs have changed little. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.