80DDB under 6A

1. Neurological Diseases where the disability level has been certified to be of 40% and above,—

• Dementia
• Dystonia Musculorum Deformans
• Motor Neuron Disease
• Ataxia
• Chorea
• Hemiballismus
• Aphasia
• Parkinson’s Disease

2. Malignant Cancers

3. Full Blown Acquired Immuno-Deficiency Syndrome (AIDS) 

4. Chronic Renal failure 

5. Hematological disorders 

• Hemophilia 
• Thalassaemia

https://www.incometaxindia.gov.in/_layouts/15/dit/Pages/view