A novel maize variety designated PHV4M and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PHV4M with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHV4M through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the variety PHV4M or a trait conversion of PHV4M with another maize variety. Inbred maize varieties derived from maize variety PHV4M, methods for producing other inbred maize varieties derived from maize variety PHV4M and the inbred maize varieties and their parts derived by the use of those methods.