ICD-10-CM 2027
ICD-10 code for lung congestion
Other specified symptoms and signs involving the circulatory and respiratory systems
From the official ICD-10-CM alphabetic index entry “Congestion, congestive › lung”. Page updated September 29, 2026.
About coding lung congestion
The ICD-10-CM code for lung congestion is R09.89 (Other specified symptoms and signs involving the circulatory and respiratory systems).
Within R09.8, choose R09.89 (Other specified symptoms and signs involving the circulatory and respiratory systems) only when documentation doesn't support a more specific option: nasal congestion (R09.81) and Postnasal drip (R09.82).
The conditions in its Excludes2 note aren't part of R09.89, but may be coded alongside it if the patient has both: foreign body in throat (T17.2-) and wheezing (R06.2).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific lung congestion codes (official index)
- active or acute
Common questions about lung congestion ICD-10 codes
What is the ICD-10 code for lung congestion?
- R09.89 — Other specified symptoms and signs involving the circulatory and respiratory systems.
Is R09.89 billable?
- Yes. R09.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R09.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R09.89 as a principal diagnosis.
Is R09.89 a CC or MCC?
- No. R09.89 is neither a CC nor an MCC under MS-DRG v44.0.