ICD-10-CM 2027
ICD-10 code for oxygen deficit
From the official ICD-10-CM alphabetic index entry “Deficit › oxygen”. Page updated September 29, 2026.
About coding oxygen deficit
The ICD-10-CM code for oxygen deficit is R09.02 (Hypoxemia).
Within R09.0 (asphyxia and hypoxemia), R09.02 is specifically for hypoxemia. Related codes cover asphyxia (R09.01).
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 205 (Other Respiratory System Diagnoses with MCC, relative weight 1.8244) and DRG 206 (Other Respiratory System Diagnoses without MCC, relative weight 0.9257), 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 oxygen deficit ICD-10 codes
What is the ICD-10 code for oxygen deficit?
- R09.02 — Hypoxemia.
Is R09.02 billable?
- Yes. R09.02 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R09.02 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R09.02 as a principal diagnosis.
Is R09.02 a CC or MCC?
- No. R09.02 is neither a CC nor an MCC under MS-DRG v44.0.