Is Q18.1 a billable ICD-10 code?

Yes. Q18.1 (Preauricular sinus and cyst) is billable and can be used for insurance claims. Always verify payer-specific requirements.

Q18.1 ✓ Billable

Preauricular sinus and cyst

Q: What is ICD-10 code Q18.1?

ICD-10-CM code Q18.1 stands for "Preauricular sinus and cyst". 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

Q18.1

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 Q18.1?

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

Is Q18.1 billable?

Yes. Q18.1 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is Q18.1 in?

Q18.1 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 Q18.0 Sinus, fistula and cyst of branchial cleft 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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