ICD-10-CM 2027
ICD-10 code for neck anomaly
From the official ICD-10-CM alphabetic index entry “Anomaly, anomalous (congenital) (unspecified type) › neck (any part)”. Page updated September 29, 2026.
About coding neck anomaly
The ICD-10-CM code for neck anomaly is Q18.9 (Congenital malformation of face and neck, unspecified).
Within Q18, choose Q18.9 (Congenital malformation of face and neck, unspecified) only when documentation doesn't support a more specific option: sinus, fistula and cyst of branchial cleft (Q18.0), preauricular sinus and cyst (Q18.1), other branchial cleft malformations (Q18.2), Webbing of neck (Q18.3), Macrostomia (Q18.4), Microstomia (Q18.5), Macrocheilia (Q18.6), Microcheilia (Q18.7) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about neck anomaly ICD-10 codes
What is the ICD-10 code for neck anomaly?
- Q18.9 — Congenital malformation of face and neck, unspecified.
Is Q18.9 billable?
- Yes. Q18.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q18.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q18.9 as a principal diagnosis.
Is Q18.9 a CC or MCC?
- No. Q18.9 is neither a CC nor an MCC under MS-DRG v44.0.