We were given code 315.32 to use for Jesse. His issues are expressive as well, as his receptive language tested several years higher than his actual age.
The procedure code we were given was 92507 in case that's helpful to anyone!
we use: 784.5 other speech disturbance v57.3 speech therapy 783.3 feeding difficulties and mismanagement (this one is a good one if your insurance doesn't cover speech therapy because it is a feeding problem)