ICD-10-CM 2027
ICD-10 code for lung cyst
From the official ICD-10-CM alphabetic index entry “Cyst (colloid) (mucous) (simple) (retention) › lung”. Page updated September 29, 2026.
About coding lung cyst
The ICD-10-CM code for lung cyst is J98.4 (Other disorders of lung). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on J98.4.
Within J98, choose J98.4 (Other disorders of lung) only when documentation doesn't support a more specific option: diseases of bronchus, not elsewhere classified (J98.0), pulmonary collapse (J98.1), interstitial emphysema (J98.2), Compensatory emphysema (J98.3), diseases of mediastinum, not elsewhere classified (J98.5), disorders of diaphragm (J98.6), other specified respiratory disorders (J98.8) and respiratory disorder, unspecified (J98.9).
Don't report J98.4 together with the conditions in its Excludes1 note: acute interstitial pneumonitis (J84.114) and pulmonary insufficiency following surgery (J95.1-J95.2).
Use an additional code to identify: exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and 1 more.
More specific lung cyst codes (official index)
Don't confuse with (Excludes1 for J98.4)
Common questions about lung cyst ICD-10 codes
What is the ICD-10 code for lung cyst?
- J98.4 — Other disorders of lung. More specific codes apply when the documentation supports them: Q33.0, J43.9.
What is the ICD-10 code for congenital lung cyst?
- Q33.0 — Congenital cystic lung.
What is the ICD-10 code for giant bullous lung cyst?
- J43.9 — Emphysema, unspecified.
Is J98.4 billable?
- Yes. J98.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J98.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J98.4 as a principal diagnosis.
Is J98.4 a CC or MCC?
- No. J98.4 is neither a CC nor an MCC under MS-DRG v44.0.