ICD-10-CM 2027
ICD-10 code for Cyanosis
From the official ICD-10-CM alphabetic index entry “Cyanosis”. Page updated September 29, 2026.
About coding Cyanosis
The ICD-10-CM code for Cyanosis is R23.0 (Cyanosis). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R23.0.
Within R23 (other skin changes), R23.0 is specifically for Cyanosis. Related codes cover Pallor (R23.1), Flushing (R23.2), spontaneous ecchymoses (R23.3), changes in skin texture (R23.4), other skin changes (R23.8) and unspecified skin changes (R23.9).
Don't report R23.0 together with the conditions in its Excludes1 note: acrocyanosis (I73.8) and cyanotic attacks of newborn (P28.2).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific Cyanosis codes (official index)
Don't confuse with (Excludes1 for R23.0)
Common questions about Cyanosis ICD-10 codes
What is the ICD-10 code for Cyanosis?
- R23.0 — Cyanosis. More specific codes apply when the documentation supports them: Q21.12, Q21.12, D74.8, I73.01 and others below.
What is the ICD-10 code for enterogenous cyanosis?
- D74.8 — Other methemoglobinemias.
Is R23.0 billable?
- Yes. R23.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R23.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R23.0 as a principal diagnosis.
Is R23.0 a CC or MCC?
- No. R23.0 is neither a CC nor an MCC under MS-DRG v44.0.