| Full description | Abnormal results of function studies of central nervous system |
| Billable | No — use a more specific child code |
| Chapter | Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) |
| Section | Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94) |
| Parent code | R94 — Abnormal results of function studies |