| 2024 | Hydrocephalus Association Incorporated | 990 | Director | 3.5 | $0 | $0 | View return |
| 2024 | Ma-Aua Education Fund Inc. | 990 | Historian | - | $0 | $0 | View return |
| 2023 | Health Ministries Clinic Inc. | 990 | Physician | 40 | $259,378 | $0 | View return |
| 2023 | Hydrocephalus Association Incorporated | 990 | Director | 3.5 | $0 | $0 | View return |
| 2022 | Health Ministries Clinic Inc. | 990 | Physician | 40 | $242,748 | $0 | View return |
| 2022 | Schellhammer Urological Research Foundation | 990 | President | 4 | $0 | $0 | View return |
| 2022 | Hydrocephalus Association Incorporated | 990 | Director | 3.5 | $0 | $0 | View return |
| 2022 | Western Michigan University Homer Stryker M D School of Medicine | 990 | Member | 0.5 | $0 | $0 | View return |
| 2021 | Health Ministries Clinic Inc. | 990 | Physician | 40 | $211,084 | $0 | View return |
| 2021 | Schellhammer Urological Research Foundation | 990 | President | 4 | $0 | $0 | View return |
| 2021 | Hydrocephalus Association Incorporated | 990 | Director | 3.5 | $0 | $0 | View return |
| 2021 | Western Michigan University Homer Stryker M D School of Medicine | 990 | Member | 0.5 | $0 | $0 | View return |
| 2020 | Health Ministries Clinic Inc. | 990 | Physician | 40 | $223,780 | $0 | View return |
| 2020 | Schellhammer Urological Research Foundation | 990 | Director | - | $0 | $0 | View return |
| 2020 | Hydrocephalus Association Incorporated | 990 | Director | 3.5 | $0 | $0 | View return |
| 2020 | Western Michigan University Homer Stryker M D School of Medicine | 990 | Member | 0.5 | $0 | $0 | View return |
| 2020 | Schellhammer Urological Research Foundation | 990 | Director | - | $0 | $0 | View return |
| 2019 | Health Ministries Clinic Inc. | 990 | Physician | 40 | $223,851 | $0 | View return |
| 2019 | Thedacare Medical Center-Shawano Inc. | 990 | Board Member / Physician | 1 | $0 | $462,349 | View return |
| 2019 | Hydrocephalus Association Incorporated | 990 | Director | 3.5 | $0 | $0 | View return |
| 2019 | Schellhammer Urological Research Foundation | 990 | Director | - | $0 | $0 | View return |
| 2019 | Western Michigan University Homer Stryker M D School of Medicine | 990 | Member | 0.5 | $0 | $0 | View return |
| 2018 | Meadows Regional Medical Center Inc | 990 | Director | 1 | $392,794 | $0 | View return |
| 2018 | Health Ministries Clinic Inc. | 990 | Physician | 40 | $222,417 | $0 | View return |
| 2018 | Thedacare Medical Center-Shawano Inc. | 990 | Board Member / Physician | 1 | $0 | $533,238 | View return |
| 2018 | Hydrocephalus Association Incorporated | 990 | Director | 3.5 | $0 | $0 | View return |
| 2018 | Schellhammer Urological Research Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Meadows Regional Medical Center Inc | 990 | Director | 1 | $432,594 | $0 | View return |
| 2017 | Hydrocephalus Association Incorporated | 990 | Director | 3.5 | $0 | $0 | View return |
| 2017 | Schellhammer Urological Research Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Schellhammer Urological Research Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Hydrocephalus Association Incorporated | 990 | Director | 3.5 | $0 | $0 | View return |
| 2015 | Hydrocephalus Association Incorporated | 990 | Director | 3 | $0 | $0 | View return |
| 2015 | Schellhammer Urological Research Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Hydrocephalus Association Incorporated | 990 | Director | 2 | $0 | $0 | View return |
| 2013 | Hill Country Primary Care Physicians | 990 | CEO/President Term: 2/22/2013 | 0.25 | $0 | $272,134 | View return |
| 2013 | Hill Country Physician Associates | 990 | CEO Term Date: 2/22/2013 | 0.25 | $0 | $272,134 | View return |