Dependence on supplemental oxygen

This code indicates a patient's ongoing requirement for external oxygen delivery to maintain adequate oxygenation. It signifies a chronic condition where the respiratory system is unable to meet the body's oxygen demands without assistance. This dependence can be continuous or intermittent, but it must be a prescribed and ongoing therapy.

Apply this code when documentation clearly states a patient is on long-term oxygen therapy (LTOT) or requires supplemental oxygen for an extended period due to conditions like severe COPD, interstitial lung disease, or chronic heart failure. It is appropriate for patients using oxygen at home, in skilled nursing facilities, or other outpatient settings.

• Always ensure the medical record explicitly states "dependence" on supplemental oxygen, not just temporary use.
• Code this as a secondary diagnosis, following the primary condition necessitating the oxygen therapy.
• Do not use for acute, short-term oxygen administration during an inpatient stay unless the patient was already dependent on oxygen prior to admission.