ICD-10-CM 2027
ICD-10 code for persistent cough
From the official ICD-10-CM alphabetic index entry “Cough (affected) (epidemic) (nervous) › persistent”. Page updated September 29, 2026.
About coding persistent cough
The ICD-10-CM code for persistent cough is R05.3 (Chronic cough).
Within R05 (cough), R05.3 is specifically for chronic cough. Related codes cover acute cough (R05.1), subacute cough (R05.2), syncope (R05.4), other specified cough (R05.8) and unspecified (R05.9).
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 persistent cough ICD-10 codes
What is the ICD-10 code for persistent cough?
- R05.3 — Chronic cough.
Is R05.3 billable?
- Yes. R05.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R05.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R05.3 as a principal diagnosis.
Is R05.3 a CC or MCC?
- No. R05.3 is neither a CC nor an MCC under MS-DRG v44.0.