Convert to ICD-10-CM: 
374.31 converts approximately to:
- 2015/16 ICD-10-CM H02.439 Paralytic ptosis unspecified eyelid
 ICD-9-CM Volume 2 Index entries containing back-references to 
374.31:
- Paralysis, paralytic (complete) (incomplete) 344.9  levator palpebrae superioris 374.31 levator palpebrae superioris 374.31
 
- Ptosis (adiposa) 374.30