ICD-10-CM 2027
ICD-10 code for carbon dioxide retention
From the official ICD-10-CM alphabetic index entry “Retention › carbon dioxide”. Page updated September 29, 2026.
About coding carbon dioxide retention
The ICD-10-CM code for carbon dioxide retention is E87.29 (Other acidosis).
Within E87.2, choose E87.29 (Other acidosis) only when documentation doesn't support a more specific option: unspecified (E87.20), acute metabolic acidosis (E87.21) and chronic metabolic acidosis (E87.22).
The conditions in its Excludes2 note aren't part of E87.29, but may be coded alongside it if the patient has both: acute respiratory acidosis (J96.02) and chronic respiratory acidosis (J96.12).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about carbon dioxide retention ICD-10 codes
What is the ICD-10 code for carbon dioxide retention?
- E87.29 — Other acidosis.
Is E87.29 billable?
- Yes. E87.29 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E87.29 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E87.29 as a principal diagnosis.
Is E87.29 a CC or MCC?
- E87.29 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.