After graduating from Patna Medical College, Patna in the year 1951, Dr. A.K.N. Sinha was the first Bihari to have qualified for M.R.C.P. in Cardiology from Royal College of Physicians, Edinburgh in 1957.
Subsequently, he obtained M.R.C.P. from Royal College of Physicians, London in 1958. He was elected a Fellow of Royal College of Physicians, Edinburgh in 1971 and also of London in 1975.
Dr. A.K.N. Sinha worked as Resident, Chief Resident and later, an Instructor in Medicine at Aultman Hospital, Canton, Ohio, USA.
Subsequently, he worked as Hony. Clinical Assistant and House Physician, at Hammersmith Hospital and Royal Postgraduate Medical School, London.
His extreme love for his motherland, forced him to return to India and he joined Patna Medical College Hospital, Patna as Junior Physician, in the year 1958 and joined as Lecturer in Medicine at Darbhanga Medical College in 1963. He was Emeritus Professor of Medicine at Nalanda Medical College, Patna since 1986.
He was elected as President of Bihar State Branch of IMA in 1967 and 1968.
Later, he rose by election to the post of President, Indian Medical Association Head Quarters as early as 1970 and again in 1971 at the young age of 41 years – a rare honour which only Dr. A.K.N. Sinha could enjoy.
He presided over the National Conference on Medical Education and the International Conference on Family Planning held in New Delhi respectively in November 1971 and in March 1972 led IMA delegations to Common Wealth Medical Conference, World Medical Assembly and World Conference on Medical Education in 1972 and visited many countries in the world attending meetings and conference during 1976 to 1984.
He was not only the first Indian but was also the first Asian to be elected as President of both the Common Wealth Medical Association and World Medical Association.
Dr. A.K.N. Sinha also had the distinction of receiving many prestigious Oration Awards and had a large number of publications to his credit and many convocation & inaugural address and was always in great demand as chief guest of IMA and conference of other Specialities.
Dr. A.K.N. Sinha was elected as a member of the Medical Council of India in 1979 and a member of its Executive Committee in February 1980 and served a term of 5 years on the committee from February 1980 to February 1985.
He was elected to the highest post of the Medical Council of India as its President in 1985. He had been associated with the Council as its President till his death on 2nd July 1994.
As President of the Medical Council, Dr. Sinha brought in many reforms in Medical Education. A workshop to revise the Undergraduate Medical Curriculum was held in August, 1992 under his able guidance and leadership.
During his tenure, Medical Council completed 60 years of its existence and he planned to celebrate the Diamond Jubilee Year of the Council spread over a year long celebrations.
His contributions were not only limited to medical education but also to health needs of the community at large.
Dr. A.K.N. Sinha was the first person who espoused the idea of establishing medical universities in all the States, Nationalization of Health Services in the country and establishment of Medical Grants Commission through Indian Medical Association and various other bodies.
It is a well known fact to the medical fraternity that Dr. A.K.N. Sinha was as down to earth and a most humble personality. He treated his patients with utmost care and such was his love for the patients that he continued to see them till April 1994 inspite of his illness.
Dr. A.K.N. Sinha had very firm conviction and commitment in all his action and deeds.