Physician

Walter John Marbach, MD

According to 2025 Medicare claims, Walter Marbach, MD (NPI: 1891703591) practices rheumatology in the Chicago-Naperville-Schaumburg, IL market, with the plurality of this provider's patient population coming from Cook, IL. This provider's primary affiliated billing organization is METRO INFECTIOUS DISEASE CONSULTANTS, LLC (NPI: 1235125717; TIN: 363966745) and primary practice location at 60445-1824. Marbach is affiliated with the IRCCO (ACO ID: A2619) and American Choice Healthcare, LLC (ACO ID: D0086), participating under both the MSSP and REACH models.

Marbach's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 553 traditional Medicare patients, billed 354,350 HCPCS/CPT codes, and received $2,786,922 in Medicare payments. The top billing code was 96413 (Administration of chemotherapy into vein, 1 hour or less). Part D data shows 1,614 prescription claims across 122 beneficiaries totaling $584,658 in drug costs, led by Enbrel (Etanercept). Open Payments data shows 35 records totaling $953. 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 $472,793 to $2,786,922. Similarly, Part D prescription costs have risen steadily, from $439,543 to $584,658. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.