ICD-10-CM 2027
ICD-10 code for malignant pleural effusion
J91.0
Malignant pleural effusion
From the official ICD-10-CM alphabetic index entry “Effusion › malignant pleural”. Page updated September 29, 2026.
About coding malignant pleural effusion
The ICD-10-CM code for malignant pleural effusion is J91.0 (Malignant pleural effusion).
Within J91 (pleural effusion in conditions classified elsewhere), J91.0 is specifically for malignant pleural effusion. Related codes cover pleural effusion in other conditions classified elsewhere (J91.8).
Code first: underlying neoplasm (C00-D49).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about malignant pleural effusion ICD-10 codes
What is the ICD-10 code for malignant pleural effusion?
- J91.0 — Malignant pleural effusion.
Is J91.0 billable?
- Yes. J91.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J91.0 be used as a principal diagnosis?
- No. It is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.
Is J91.0 a CC or MCC?
- J91.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.