Blalock Taussig (BT) shunt surgery cost in India ranges from $5200 to $6500, which is approximately equivalent to 4,30,000 to 5,45,000 Indian rupees. It is a palliative procedure that creates a connection between a subclavian artery and a pulmonary artery to increase blood flow to the lungs, often performed in infants with congenital heart defects like Tetralogy of Fallot (TOF).