Dr. Ranjan K. Das is a Pulmonologist in Alipore, Kolkata and has an ex…read moreperience of 38 years in this field. Dr. Ranjan K. Das practices at The Calcutta Medical Research Institute in Alipore, Kolkata. He completed MBBS from Maulana Azad Medical Collage in 1977 and MD - Tuberculosis & Respiratory Diseases/Medicine from Delhi University in 1982.read less