ICD-11 classes
21 Symptoms, signs or clinical findings, not elsewhere...
Mental or behavioural symptoms, signs or clinical findings
MB28 — Symptoms or signs related to personality features
MB28.G — Stubbornness

ICD-11 MB28.G — Stubbornness

A steadfast adherence to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.