When does MEDPROS update after getting a PHA?

As long as it takea the provider/medics to input it. MEDPROS itself updates very quickly and will populate across the Army relatively quickly, as well. The delay in updates is ALMOST always a result of waiting on data to be input.

Talk to your unit medic (if you have a direct assigned medic) or your medic psg (if you have a consolidated medical plt). They can give you best answers as to when data will be I input as well as when YOU will be able to see it populated.