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Z99.81

Billable

Dependence on supplemental oxygen

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A patient requires supplemental oxygen therapy to maintain adequate oxygen levels in their blood due to a chronic lung or heart condition. This code indicates their dependence on oxygen equipment.

Coding Tips

  • •Document the type of oxygen delivery system (nasal cannula, mask, concentrator, etc.) and the frequency of use (continuous, nocturnal, or as needed) in the medical record
  • •Use this code for all encounters where the patient is oxygen-dependent; pair with the underlying respiratory or cardiac condition code

Code Hierarchy

└Z99Dependence on enabling machines and devices, not elsewhere classified└Z99.8Dependence on other enabling machines and devices└Z99.81Dependence on supplemental oxygen
└Z99.81Dependence on supplemental oxygen

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