| Full description | Family history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism |
| Billable | Yes |
| Chapter | Chapter 21: Factors influencing health status and contact with health services (Z00-Z99) |
| Section | Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99) |
| Parent code | Z83 — Family history of other specific disorders |