Your father's investment in your education is undoubtedly a source of immense reward. The expenditure a parent makes on their child is among the most meritorious forms of charity. The Prophet (peace be upon him) said: "The most rewarding dinar a person spends is one spent on his family." [Muslim, 994]
Your medical expertise serves Muslim women by providing them healthcare without the need to consult male physicians — a benefit of tremendous value, and your father was the means through which it was achieved.
The prophetic principle applies here: whoever facilitates a good deed earns a reward equal to its doer. The Prophet (peace be upon him) stated: "Whoever guides someone to a good deed receives the same reward as the one who performs it." [Muslim, 1893]
Regarding the hadith: "When a person passes away, their deeds cease except for three: ongoing charity, beneficial knowledge, or a righteous child who supplicates for them" [Muslim, 1631] — this encompasses all knowledge that benefits people, including secular disciplines. Imam ash-Shafi'i (may Allah have mercy on him) considered medicine the noblest field of knowledge after the study of what is lawful and prohibited.
Shaykh Ibn 'Uthaymin explained that any knowledge bringing benefit to others qualifies for this ongoing reward, with Islamic knowledge being foremost among them. Similarly, those who play a role in disseminating beneficial knowledge — whether as sponsors, teachers, or facilitators — share in this reward.
May Allah reward your father abundantly.