hi sharmaphysio,
if u want a lincense in usa first of all u have to clear the credential evaluation from any approved centers [fccpt,ierf,icd..............] i think this process will takes atlest 3 months
next after evaluation they will send u the credits [usually india PT requires more credits] then u have to complete ur credits and again u have to go for evaluation then the evaluation board will sent u a report to u that u r eligible to NPTE then u have u apply for the examination to FSBPT
finally if u passed the exam u have to do a internship for few months depending on the state u r applying [ex: for california it is 9 months] this u have to under a license PT
hope this helps u