Dr. Khanna is a celebrated pulmonologist and researcher, one of only a few DM specialists in India. A university gold medalist with 10 MBBS golds and a DM exit gold, he was honored as the Global Rising Star in Pulmonary Medicine at an international French workshop for his work on biomass‑related COPD. He specializes in advanced respiratory failure, severe COPD, asthma, interstitial lung disease, sleep disorders, and pulmonary rehab. With over 100 publications, book chapters, 500+ invited lectures, and roles on global editorial boards, he leads the department with clinical and academic excellence