ICD-10 Code for Hydrothorax
Also indexed as (double) (pleura)
The ICD-10-CM code for hydrothorax is J94.8 — Other specified pleural conditions. This is the code the Alphabetic Index gives for hydrothorax with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
J94.8 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which hydrothorax code should you use?
The Alphabetic Index lists 5 codes under Hydrothorax. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
Hydrothorax chylous
| filarial | B74.9 | Filariasis, unspecified |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources