hello aspirant,

I hope that  you are doing absolutely great.

With reference to your above mentioned query, i would like to tell you that yes, you can do PHD program in medical Biochemistry after Msc or with any of teh master's degree medical programme. PhD is the option for you if you are only interested in research. Direct PhD after MBBS is available in many institutes.

In AIIMS, you have to clear the institute's entrance exam. In other institutes you may need to clear CSIR-NET or some qualifying exam.

Further, to know more about the phd program in medical biochemistry, follow the below mentioned link to know more on this in detail :

https://www.careers360.com/colleges/hamdard-institute-of-medical-sciences-and-research-new-delhi/phd-medical-biochemistry-course

I hope that this will help.