E884.4 is the code for fall from bed. But that is never used as a first or primary code. If the child was admitted, were there documented injuries? Often there is a head injury but must be documented. If all you have is observation for a suspected injury, you are into the V codes like V71.4 or V29.8 for newborn. But you might want to review chart to see if there is more, or send back to provider to get clarification on why the child was admitted. Jim