ICD-10-CM 2027
ICD-10 code for air pressure effect
From the official ICD-10-CM alphabetic index entry “Effect, adverse › air pressure”. Page updated September 29, 2026.
About coding air pressure effect
The ICD-10-CM code for air pressure effect is T70.9 (Effect of air pressure and water pressure, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on T70.9.
Within T70, choose T70.9 (Effect of air pressure and water pressure, unspecified) only when documentation doesn't support a more specific option: otitic barotrauma (T70.0), sinus barotrauma (T70.1), other and unspecified effects of high altitude (T70.2), Caisson disease [decompression sickness] (T70.3), effects of high-pressure fluids (T70.4) and other effects of air pressure and water pressure (T70.8).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific air pressure effect codes (official index)
- specified NEC T70.8 — Other effects of air pressure and water pressure
Common questions about air pressure effect ICD-10 codes
What is the ICD-10 code for air pressure effect?
- T70.9 — Effect of air pressure and water pressure, unspecified (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T70.8.
Is T70.9 billable?
- No. T70.9 is a header code. Report one of its more specific subcodes instead.