In 1956, the New York City Transit Authority announced plans to add fluorescent lighting to the station.

[7] The walls of both platforms retain their original mosaic trim line with "MH" tablets on it – a relic of the station's former name.

Blue i-beam columns run along both platforms at regular intervals with alternating ones having the standard black number plates in white lettering.

[12] The 138th Street–Grand Concourse station has two side platforms and three tracks, and is one of only two on the IRT Jerome Avenue Line to be built underground.

[13] Both platform walls have their original mosaic trim line with "MH" tablets on it, a relic of Mott Haven Avenue, the former name of the station.

Blue i-beam columns run along both platforms at regular intervals with alternating ones having the standard black number plates in white lettering.

Outside fare control, there is a token booth and two staircases going up to the northern corners of East 138th Street and the Grand Concourse.