Q18 vs Q89.2
Q18 (Other congenital malformations of face and neck) compared with Q89.2 (Congenital malformations of other endocrine glands), 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. Q18 carries an Excludes1 note covering Q89.2: “persistent thyroglossal duct (Q89.2)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Yes, when both are documented. Q18 carries an Excludes2 note covering Q89.2: “congenital malformation of parathyroid gland (Q89.2)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. Q18 carries an Excludes2 note covering Q89.2: “congenital malformation of thyroid gland (Q89.2)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| Q18Other congenital malformations of face and neck | Q89.2Congenital malformations of other endocrine glands | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Other congenital malformations of face and neck is a non-billable ICD-10-CM category code (Q18). | Congenital malformations of other endocrine glands is a billable ICD-10-CM diagnosis code (Q89.2). |
| Includes | — | Congenital malformation of parathyroid or thyroid gland Persistent thyroglossal duct Thyroglossal cyst |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources