| Billable | No — use a more specific child code |
| Chapter | Chapter 9: Diseases of the circulatory system (I00-I99) |
| Section | Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89) |
| Parent code | I80.2 — Phlbts and thombophlb of and unsp deep vessels of low extrm |