Z99.81 — Dependence on supplemental oxygen

Z99.81

ICD-10 Chapter 21: Factors Influencing Health Status — illustrative image — Chapter 21: Factors influencing health status and contact with health services (Z00–Z99) — illustrative image

What this code means

Dependence on supplemental oxygen: the person uses prescribed oxygen therapy at home or continuously.

Also called: oxygen dependence, on home oxygen.

When this code is used

Used for dependence on supplemental oxygen.

Where it sits in ICD-10-CM

Code Z99.81 belongs to Chapter 21: Factors influencing health status and contact with health services, which covers codes Z00–Z99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

Breathlessness

Frequently asked questions

What is ICD-10-CM code Z99.81?

Z99.81 is the ICD-10-CM diagnosis code for “Dependence on supplemental oxygen”. Dependence on supplemental oxygen: the person uses prescribed oxygen therapy at home or continuously.

When is code Z99.81 used?

Used for dependence on supplemental oxygen. It belongs to Chapter 21 of ICD-10-CM (Factors influencing health status and contact with health services).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.