Coding and coverage · ICD-10-CM

Q33 Congenital malformations of lung

Not billable (header)Chapter 17

Report one of the more specific codes below.

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Codes under this one

  • Q33.0 Congenital cystic lung
  • Q33.1 Accessory lobe of lung
  • Q33.2 Sequestration of lung
  • Q33.3 Agenesis of lung
  • Q33.4 Congenital bronchiectasis
  • Q33.5 Ectopic tissue in lung
  • Q33.6 Congenital hypoplasia and dysplasia of lung
  • Q33.8 Other congenital malformations of lung
  • Q33.9 Congenital malformation of lung, unspecified

Instructional notes

Chapter 17

Excludes2Not included here: the patient may have both; report both when both are present.
  • inborn errors of metabolism (E70-E88)
Notes
  • Codes from this chapter are not for use on maternal records

Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1) · Q30-Q34 Congenital malformations of the respiratory system (Q30-Q34)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.