ICD-10-CM > Z00-Z99 > Z69-Z76 > Z72 > Z72.8 > Z72.82 > Z72.821 Z72.821 Inadequate sleep hygiene Billable/Specific Copy Code Copy Description Applicable To Bad sleep habitsIrregular sleep habitsUnhealthy sleep wake schedule Type 1 Excludes insomnia (F51.0-, G47.0-)