C. beddomei may attain a snout-to-vent length (SVL) of 50 cm (20 in), with a tail length of 6.5 cm (2.6 in).
Beddome's coral snake is found in semi-evergreen and tropical dry deciduous hills in the Eastern Ghats and the Western Ghats of India, at altitudes of 550–1,100 m (1,800–3,610 ft). Being first described from the Shevaroy Hills or Yercaud, this species was later known from other parts of the Western Ghats. It is only known from three localities, Koppa, Nilgiri Mountains, and Shevaroy.
C. beddomei is terrestrial.
C. beddomei is oviparous.