| Activity | Inpatient* | Outpatient | 2025 Q4 | 2026 Q1 |
|---|---|---|---|---|
| PHC4 begins accepting claims data and laboratory data** | X | X | January 2, 2026 | April 1, 2026 |
| Claims data and laboratory data** due | X | X | March 31, 2026 | June 30, 2026 |
| Error corrections due | X | X | April 30, 2026 | July 31, 2026 |
| * | Inpatient data is grouped using MS-DRG Version 43 |
| ** | Laboratory data reporting only applies to GAC and SGAC hospitals |