Hypothermia can mimic other medical conditions and those are best ruled out by a healthcare provider. Even shivering is not necessarily a sign of hypothermia. Fever and chills can cause shivering, as can withdrawal from opiate use.
If the patient is shivering and having difficulty with fine motor skills but doesn’t have a body temperature below 95 degrees, it isn’t hypothermia.
Likewise, if a patient is hypothermic with a body temp below 95 degrees and is unconscious, the diagnosis is hypothermia, but the patient could very easily have other conditions as well.
The gold standard for hypothermia diagnosis is to use the core body temperature.