Can my Uncle use his nursing payment as a deduction?

Yes, as long as the principal reason for him being there is for medical care, then his nursing home costs are deductible as an itemized expense.

Itemized expenses include mortgage interest, state and local taxes up to $10,000, medical expenses in excess of 7.5% of your AGI and casualty and losses in excess of 10% of you AGI with the first $100 not counting towards the loss.  Your health insurance and all medical expenses are only deductible for the amount that is over 7.5% of your AGI.  This means if your AGI is $50,000, then the amount that is over $3,750 is deductible.  

Then your total itemized expenses would need to be greater than your standard deduction below in order to benefit from your insurance premium payments. 

The 2023 Standard Deductions are as follows:

• Married Filing Joint (MFJ)              $27,700
• Married Filing Separate (MFS)      $13,850
• Head of Household (HOH)             $20,800 
• Single                                                     $13,850                                

Blind and MFJ or MFS add $1,500

Single or HOH if blind add $1,850

If your uncle is single and over 65 his standard deduction would be $15,700.  So his itemized expenses would need to be greater than $15,700 for it to make a difference on his return.

Standard versus Itemized Deduction