ICD-11 classes
21 Symptoms, signs or clinical findings, not elsewhere...
Mental or behavioural symptoms, signs or clinical findings
MB23 — Symptoms or signs involving appearance or behaviour
MB23.J — Poor personal hygiene

ICD-11 MB23.J — Poor personal hygiene

Unwillingness or inability to maintain a level of personal cleanliness that is in keeping with the standards of the person's culture, society, or setting, such as not washing or brushing one's teeth.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.