ICD-10-CM > S00-T88 > T66-T78 > T70 > T70.2 > T70.29 T70.29 Other effects of high altitude Non-Billable/Non-Specific Applicable To Alpine sicknessAnoxia due to high altitudeBarotrauma NOSHypobaropathyMountain sickness Codes T70.29XA..., initial encounterT70.29XD..., subsequent encounterT70.29XS..., sequela