This disclosure relates to video coding and more particularly to techniques for intra prediction coding. In one example, a method of decoding video data is disclosed. The method comprises: parsing a value of a flag indicating whether an intra prediction mode used for generating a prediction for a current video block is a planar mode, wherein the value for the flag is encoded using a context value selected from a set of contexts; and determining whether the intra prediction mode used for generating the prediction for the current video block is the planar mode based on the parsed value of the flag.