Q853-char group
Phakomatoses, not elsewhere classified
⇄ Primary-code rule changed vs QĐ4469
Coding rules (TT06)
- ●Avoid — more specific 4-5 char codes exist (see below)
Coding guidance (WHO 2019)
Excl.: ataxia telangiectasia [Louis-Bar] (G11.3) familial dysautonomia [Riley-Day] (G90.1)