Parin2005,
Which city will you be visiting? as an US resident, we have a dedicated Hematologist for our child who prescribes the transfusion and related care. The Hematologist sits at the children's hospital so we just go to him to get everything coordinated - type/cross, transfusion, all other lab work, chelator prescription etc.
As a visitor, I suggest you send an email to Patient Services Manager: Eileen Scott (eileen.s@thalassemia.org) from CAF to get some insight into how to get it started. Or, may be someone else on the forum as additional advise.