| Full description | Atypical squamous cells of undetermined significance on cytologic smear of anus (ASC-US) |
| Billable | Yes |
| Chapter | Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) |
| Section | Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis (R83-R89) |
| Parent code | R85.61 — Abnormal cytologic smear of anus |