ICD-10-CM 2027
ICD-10 code for breathing abnormal
From the official ICD-10-CM alphabetic index entry “Abnormal, abnormality, abnormalities › breathing”. Page updated September 29, 2026.
About coding breathing abnormal
The ICD-10-CM code for breathing abnormal is R06.9 (Unspecified abnormalities of breathing).
Within R06, choose R06.9 (Unspecified abnormalities of breathing) only when documentation doesn't support a more specific option: dyspnea (R06.0), Stridor (R06.1), Wheezing (R06.2), periodic breathing (R06.3), Hyperventilation (R06.4), mouth breathing (R06.5), Hiccough (R06.6), Sneezing (R06.7) and 1 more.
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 204 (Respiratory Signs and Symptoms, relative weight 0.821), 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.
Common questions about breathing abnormal ICD-10 codes
What is the ICD-10 code for breathing abnormal?
- R06.9 — Unspecified abnormalities of breathing.
Is R06.9 billable?
- Yes. R06.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R06.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R06.9 as a principal diagnosis.
Is R06.9 a CC or MCC?
- No. R06.9 is neither a CC nor an MCC under MS-DRG v44.0.