T70.20 Unspecified effects of high altitude

Non-billable ICD-10-CM code.

Applies from T70 Effects of air pressure and water pressure

7th character note

• The appropriate 7th character is to be added to each code from category T70

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Applies from T70.2 Other and unspecified effects of high altitude

Excludes2 (not included here)

• polycythemia due to high altitude (D75.1)

Code annotations containing back-references to T70.20

Back-references to T70.2

• Type 1 Excludes: T71 Asphyxiation ("anoxia due to high altitude (T70.2)")

Diagnosis Index entries for T70.20

• Disease, diseased › altitude
• High › altitude effects
• Sickness › altitude

Nearby codes

• T70.1 Sinus barotrauma
• T70.1XXA Sinus barotrauma, initial encounter
• T70.1XXD Sinus barotrauma, subsequent encounter
• T70.1XXS Sinus barotrauma, sequela
• T70.2 Other and unspecified effects of high altitude
• T70.20 Unspecified effects of high altitude (this code)
• T70.20XA Unspecified effects of high altitude, initial encounter
• T70.20XD Unspecified effects of high altitude, subsequent encounter
• T70.20XS Unspecified effects of high altitude, sequela
• T70.29 Other effects of high altitude
• T70.29XA Other effects of high altitude, initial encounter