Abnormal ferritin levels can have various causes, ranging in severity from 'needs attention' to 'life-threatening'. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose abnormal ferritin levels, we could:
|Iron Deficiency Anemia||5%||Ruled out|
Ferritin. Unit: ng/mL [pmol/L]
Possible responses:→ Don't know
→ Under 10 
→ 10-17 [22-39]
→ 18-270 [40-607] (normal)
→ Over 270 
Less common causes of elevated ferritin levels include the presence of chronic inflammatory disorders, acute hepatitis and Gaucher's disease.