@mmABCD,
Are you in the US? If so she is supposed to have insurance. She if she can find her insurance card? Also, does she have a regular doctor that she sees -- I know that you said her parents don't believe in western medicine, but she may have a primary care doctor if she is in the US - she could always call the officer herself -- you have not mentioned her age, but I would assume based on your relationship she must be 15 or older.... so old enough she can contact her doctor herself.
If she is in the US and has a doctor, she should contact her doctor herself..they should have all the insurance information. Also, if there is any cost and she is under 18 the parents are responsible for paying for her care even if they don't want to -- if care is needed they need to pay cash.
There has just been recently a case in the US where the government is forcing a child to receive cancer treatment even though her parents and she does not want it -- because she is a minor.
The planned parenthood as someone suggested is a great route too as they will give you both advice and try to help as much as possible and again I wouldn't worry about the financial aspect if your girlfriend is under 18 as the parents will be responsible whether they want to be or not.