ICD-10-CM 2027
ICD-10 code for lung bulla
From the official ICD-10-CM alphabetic index entry “Bulla (e) › lung (emphysematous) (solitary)”. Page updated September 29, 2026.
About coding lung bulla
The ICD-10-CM code for lung bulla is J43.9 (Emphysema, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on J43.9.
Within J43, choose J43.9 (unspecified) only when documentation doesn't support a more specific option: unilateral pulmonary emphysema [MacLeod's syndrome] (J43.0), Panlobular emphysema (J43.1), Centrilobular emphysema (J43.2) and other emphysema (J43.8).
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 190 (Chronic Obstructive Pulmonary Disease with MCC, relative weight 1.0748), DRG 191 (Chronic Obstructive Pulmonary Disease with CC, relative weight 0.8261) and DRG 192 (Chronic Obstructive Pulmonary Disease without CC/MCC, relative weight 0.6288), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific lung bulla codes (official index)
- newborn P25.8 — Other conditions related to interstitial emphysema originating in the perinatal period
Common questions about lung bulla ICD-10 codes
What is the ICD-10 code for lung bulla?
- J43.9 — Emphysema, unspecified. More specific codes apply when the documentation supports them: P25.8.
What is the ICD-10 code for newborn lung bulla?
- P25.8 — Other conditions related to interstitial emphysema originating in the perinatal period.
Is J43.9 billable?
- Yes. J43.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J43.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J43.9 as a principal diagnosis.
Is J43.9 a CC or MCC?
- No. J43.9 is neither a CC nor an MCC under MS-DRG v44.0.