Dr Raj graduated with distinction from Seth GS Medical College Mumbai in 1993 and completed post-graduation in General medicine at LTM Medical college in 1996. She passed the MRCP UK in 1996 and then specialised in Haematology training in South East London at Guys and St Thomas' and Kings College Hospitals ( FRCPath 2007; CCST 2007). She did her doctorate research on Myelodysplastic syndromes under a Medical Research Council Fellowship and was awarded her PhD in 2009 on The role of p15INK4B in MDS.
She was appointed a Consultant Haematologist in Stem cell transplantation in 2007 and has since worked between Guys and St Thomas' and Kings College Hospitals. She is the lead investigator for the UK haplo trial, has been instrumental in the use of ECP for acute GVHD and is the principal investigator for the national AML 18,19 trials at Guys Hospital.