ICD-10-CM > H00-H59 > H43-H44 > H44 > H44.4 H44.4 Hypotony of eye Non-Billable/Non-Specific Codes H44.40Unspecified hypotony of eyeH44.41Flat anterior chamber hypotony of eyeH44.411Flat anterior chamber hypotony of right eyeH44.412Flat anterior chamber hypotony of left eyeH44.413Flat anterior chamber hypotony of eye, bilateralH44.419Flat anterior chamber hypotony of unspecified eyeH44.42Hypotony of eye due to ocular fistulaH44.421Hypotony of right eye due to ocular fistulaH44.422Hypotony of left eye due to ocular fistulaH44.423Hypotony of eye due to ocular fistula, bilateralH44.429Hypotony of unspecified eye due to ocular fistulaH44.43Hypotony of eye due to other ocular disordersH44.431Hypotony of eye due to other ocular disorders, right eyeH44.432Hypotony of eye due to other ocular disorders, left eyeH44.433Hypotony of eye due to other ocular disorders, bilateralH44.439Hypotony of eye due to other ocular disorders, unspecified eyeH44.44Primary hypotony of eyeH44.441Primary hypotony of right eyeH44.442Primary hypotony of left eyeH44.443Primary hypotony of eye, bilateralH44.449Primary hypotony of unspecified eye