Many people in the country think that cheap medical uniforms can only be found in Divisoria because everything is supposedly sold there. Possibly, there are sellers of healthcare uniforms there but the scrubs I always see being sold there are the printed ones usually worn by nannies, not nurses.
If you're looking for hospital scrubs, then it's Bangbang (in Sta. Cruz) where you should go. It's really the area where medical uniforms are sold along with all those other medical equipment (from nebulizers to hospital beds and wheelchairs). They come in many colors too and cost around P300 a pair (top and pants).