| Disaggregation of Revenue [Table Text Block] |
The following tables summarize the Company's segment revenues by primary payor source: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three months ended March 31, 2026 | | Three months ended March 31, 2025 | | U.S. dialysis | | Other — Ancillary services | | Consolidated | | U.S. dialysis | | Other — Ancillary services | | Consolidated | | Dialysis patient service revenues: | | | | | | | | | | | | | Medicare and Medicare Advantage | $ | 1,675,413 | | | $ | | $ | 1,675,413 | | | $ | 1,609,018 | | | $ | | $ | 1,609,018 | | | Medicaid and Managed Medicaid | 212,830 | | | | | 212,830 | | | 206,509 | | | | | 206,509 | | | Other government | 92,940 | | | 248,179 | | | 341,119 | | | 76,746 | | | 209,747 | | | 286,493 | | | Commercial | 954,243 | | | 109,664 | | | 1,063,907 | | | 924,888 | | | 87,819 | | | 1,012,707 | | | Other revenues: | | | | | | | | | | | | | Medicare and Medicare Advantage | | | 108,506 | | | 108,506 | | | | | 98,954 | | | 98,954 | | | Medicaid and Managed Medicaid | | | — | | | — | | | | | 2 | | | 2 | | | Commercial | | | 3,648 | | | 3,648 | | | | | 2,701 | | | 2,701 | | Other(1) | 6,275 | | | 27,610 | | | 33,885 | | | 6,008 | | | 15,599 | | | 21,607 | | | Eliminations of intersegment revenues | (20,472) | | | (3,288) | | | (23,760) | | | (11,734) | | | (2,728) | | | (14,462) | | | Total | $ | 2,921,229 | | | $ | 494,319 | | | $ | 3,415,548 | | | $ | 2,811,435 | | | $ | 412,094 | | | $ | 3,223,529 | |
(1) Consists primarily of management service fees in the Company's U.S. dialysis business and research fees, management fees, and other non-patient service revenues in the Other - ancillary services businesses.
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