| X210 | Additional Information to Support a Health Care Claim or Encounter | 275 |
| X211 | Additional Information to Support a Health Care Services Review | 275 |
| X212 | Health Care Claim Status Request and Response | 276/277 |
| X213 | Health Care Claim Request for Additional Information | 277 |
| X214 | Health Care Claim Acknowledgment | 277 |
| X215 | Health Care Services Review - Inquiry | 278/278 |
| X216 | Health Care Services Review Notification and Acknowledgment | 278 |
| X217 | Health Care Services Review - Request for Review and Response | 278 |
| X220 | Benefit and Enrollment Maintenance | 834 |
| X221 | Health Care Claim Payment/Advice | 835 |
| X222 | Health Care Claim: Professional | 837 |
| X223 | Health Care Claim: Institutional | 837 |
| X224 | Health Care Claim: Dental | 837 |
| X228 | Health Care Claim Pending Status Information | 277 |
| X279 | Health Care Eligibility Benefit Inquiry and Response | 270/271 |
| X298 | Post-adjudicated Claims Data Reporting: Professional | 837 |
| X299 | Post Adjudicated Claims Data Reporting: Institutional | 837 |
| X300 | Post Adjudicated Claims Data Reporting: Dental | 837 |
| X364 | Data Reporting Acknowledgment | 277 |
| X231 | Implementation Acknowledgment For Health Care Insurance | 999 |