H55.01 vs Q15
H55.01 (Congenital nystagmus) compared with Q15 (Other congenital malformations of eye), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Q15 carries an Excludes1 note covering H55.01: “congenital nystagmus (H55.01)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| H55.01Congenital nystagmus | Q15Other congenital malformations of eye | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Congenital nystagmus is a billable ICD-10-CM diagnosis code (H55.01). | Other congenital malformations of eye is a non-billable ICD-10-CM category code (Q15). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources