In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
1- If a woman is seeking a medical treatment that is outside of an emergency, then she should search for a female chiropractor.
2- In an emergency or for a special treatment if only a person from the opposite gender is qualified to perform, then she can go to a male chiropractor.
Sheikh Omar Suleiman answers your question in this short video:
Almighty Allah knows best.