Dr. Krishnan is the director of The Healthy Sleep™ – Advanced Center for Snoring, Sleep Apnea, and Migraine Therapy. This is the first such center in India to provide Oral appliance treatment for Snoring and Sleep Apnea. He has been involved in treating snoring / sleep apnea since 2001.

Dr. Krishnan is a 3rd generation allopathic doctor in his family. His grandfather, the late Dr. A. S. Vaidyanatha Iyer, chose to settle down at Thalassery when he was posted there under the British regime in 1918 and was well known for his medical skills. His father, the late Dr. A. V. Subramanian, had his medical education at Stanley Medical College (SMC), Chennai and specialization in Ophthalmology. He was in private practice since 1948, after a brief stint under the British Medical Service during World War II, for over 5 decades until 2001, when he retired from practice due to ill health. Dr. Krishnan is now carrying forward the yeoman service done by his family for almost a century.