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ICD-10-CM 2027 diagnosis code

R05.3Chronic cough

✓ Billable / specific

R05.3 is a valid, billable ICD-10-CM code for chronic cough. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2022 (effective October 1, 2021). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R05.3

R05.3 is the ICD-10-CM diagnosis code for chronic cough. It belongs to category R05 (cough), block R00-R09 (symptoms and signs involving the circulatory and respiratory systems) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

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.

It was added in FY2022, effective October 1, 2021.

Coding notes

Applicable toConditions and synonyms classified to this code
  • Persistent cough
  • Refractory cough
  • Unexplained cough

Notes that apply from higher levels

Instructions written at a parent level also apply to R05.3.

› From R05 Cough
Excludes1
  • paroxysmal cough due to Bordetella pertussis (A37.0-)
  • smoker's cough (J41.0)
Excludes2
  • cough with hemorrhage (R04.2)

Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to R05.3.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 04 · Diseases and Disorders of the Respiratory System

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2022 (effective 10/1/2021): Added
  • No changes since FY2022.

Common questions about R05.3

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.

What DRG does R05.3 group to?

R05.3 is used in the MS-DRG v44.0 logic for MS-DRG 204 (Respiratory Signs and Symptoms). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.