W94.11
Exposure to residence or prolonged visit at high altitude
Not billable — category only FY2026 2025-10-01 → 2026-09-30
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 1
V00-Y99chapter
Notes
- This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.S00-T88
Index entries leading here 9
Alongside this code 1 same parent — W94.1
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.