Is Q18.0 a billable ICD-10 code?

Yes. Q18.0 (Sinus, fistula and cyst of branchial cleft) is billable and can be used for insurance claims. Always verify payer-specific requirements.

Q18.0 ✓ Billable

Sinus, fistula and cyst of branchial cleft

Q: What is ICD-10 code Q18.0?

ICD-10-CM code Q18.0 stands for "Sinus, fistula and cyst of branchial cleft". It is a billable code in the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Congenital Malformations, Deformations and Chromosomal Abnormalities

Code

Q18.0

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Congenital Malformations, Deformations and Chromosomal Abnormalities

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code Q18.0?

ICD-10-CM code Q18.0 represents Sinus, fistula and cyst of branchial cleft. It is a billable diagnosis code in the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter, effective October 1, 2025 – September 30, 2026.

Is Q18.0 billable?

Yes. Q18.0 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is Q18.0 in?

Q18.0 belongs to the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter (Q00–Q99) of ICD-10-CM.

Related codes in the Q18 category

Q18 Other congenital malformations of face and neck Non-billable Q18.1 Preauricular sinus and cyst Billable Q18.2 Other branchial cleft malformations Billable Q18.3 Webbing of neck Billable Q18.4 Macrostomia Billable Q18.5 Microstomia Billable Q18.6 Macrocheilia Billable Q18.7 Microcheilia Billable

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