Am I entitled to take what I spent on my father's treatment from his inheritance before it is divided among the heirs?

If a father needs medical treatment, his financially capable son is obligated to cover the costs of his treatment, because medical treatment falls under the category of obligatory maintenance for a needy parent. This is by consensus among scholars. What the son spends on his father's treatment is considered an act of filial piety, and he is not entitled to take it from the inheritance.