same thing that all the parents would do is - go visit the hospital that you preferred and make an appointment with the doc. from there normally they will schedule the next appointment etc. my wife and i did went to few hospitals and KPJ is one of it. per visit it will cost you somewhere around 200++ together with the scanning and vitamins. but in the end, we opt for Columbia Asia since it is the nearest to our home.

you can also do some research by googling the recommended O&G in your area. if you're not specific with the gender of the doc, it will be easier on your behalf. anyways, happy researching & congrats! my wife is due in July

I'm not sure if you are more concern cost or doctor.
KPJ Hospital Ipoh - most expensive in Ipoh, natural delivery cost RM2K++, c-sec cost RM4K++, Dr Diva is one of the very famous gynae in Ipoh, famous with his patient and professional, many good reviews from friends

PCSH Ipoh - natural delivey package 3 days 2 night RM1888, Dr Chen

Kinta Hospital Ipoh - natural delivery package 2 days 1 night < RM1K, both gynae there, Dr Anand and Dr Yip is very famous too

Very seldom to have female gynae in Ipoh. But there's a few in KPJ Ipoh. You may check their website.
Dr Lu Luan from KPJ Ipoh is one of the famous gynae, but heard that she's on long holiday, maybe you can visit the hospital and check it out. Most famous gynae in KPJ still is Dr Diva but he's a male gynae..

ps: KPJ Ipoh is a breastfeeding friendly hospital, I attend their free breastfeeding seminar.. quite good and informative. My friends who delivered there, comment that the nurses are very helpful to help you to breastfeed your newborn.

There's a few female gynae listed in their website, you may have a look.
When you visit KPJ, maybe you can "interview" some nurses, which doctor is better