ICD-10-CM 2027
ICD-10 code for anoxia
From the official ICD-10-CM alphabetic index entry “Anoxia (pathological)”. Page updated September 29, 2026.
About coding anoxia
The ICD-10-CM code for anoxia is R09.02 (Hypoxemia). The official index lists 15 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R09.02.
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.
More specific anoxia codes (official index)
- altitude T70.29 — Other effects of high altitude
- cerebral G93.1 — Anoxic brain damage, not elsewhere classified
- complicating
- anesthesia (general) (local) or other sedation T88.59 — Other complications of anesthesia
- in labor and delivery O74.3 — Central nervous system complications of anesthesia during labor and delivery
- in pregnancy O29.21 — Cerebral anoxia due to anesthesia during pregnancy
- postpartum, puerperal O89.2 — Central nervous system complications of anesthesia during the puerperium
- delivery (cesarean) (instrumental) O75.4 — Other complications of obstetric surgery and procedures
- during a procedure G97.81 — Other intraoperative complications of nervous system
- newborn P84 — Other problems with newborn
- resulting from a procedure G97.82 — Other postprocedural complications and disorders of nervous system
- due to
- drowning T75.1 — Unspecified effects of drowning and nonfatal submersion
- high altitude T70.29 — Other effects of high altitude
- heart
- intrauterine P84 — Other problems with newborn
- myocardial
- newborn P84 — Other problems with newborn
- spinal cord G95.11 — Acute infarction of spinal cord (embolic) (nonembolic)
- systemic (by suffocation) (low content in atmosphere)
Common questions about anoxia ICD-10 codes
What is the ICD-10 code for anoxia?
- R09.02 — Hypoxemia. More specific codes apply when the documentation supports them: T70.29, G93.1, T88.59, O74.3 and others below.
What is the ICD-10 code for altitude anoxia?
- T70.29 — Other effects of high altitude (header code; choose a more specific subcode).
What is the ICD-10 code for cerebral anoxia?
- G93.1 — Anoxic brain damage, not elsewhere classified.
What is the ICD-10 code for intrauterine anoxia?
- P84 — Other problems with newborn.
What is the ICD-10 code for newborn anoxia?
- P84 — Other problems with newborn.
What is the ICD-10 code for spinal cord anoxia?
- G95.11 — Acute infarction of spinal cord (embolic) (nonembolic).
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.