H18.7 vs Q13.4
H18.7 (Other and unspecified corneal deformities) compared with Q13.4 (Other congenital corneal malformations), 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. H18.7 carries an Excludes1 note covering Q13.4: “congenital malformations of cornea (Q13.3-Q13.4)”
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
| H18.7Other and unspecified corneal deformities | Q13.4Other congenital corneal malformations | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Other and unspecified corneal deformities is a non-billable ICD-10-CM category code (H18.7). | Other congenital corneal malformations is a billable ICD-10-CM diagnosis code (Q13.4). |
| Includes | — | Congenital malformation of cornea NOS Microcornea Peter's anomaly |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources