This advice-column-style blog for SLPs was authored by Pam Marshalla from 2006 to 2015, the archives of which can be explored here. Use the extensive keywords list found in the right-hand column (on mobile: at the bottom of the page) to browse specific topics, or use the search feature to locate specific words or phrases throughout the entire blog.
Q: Is it necessary to get a diagnosis of apraxia with a young child who does not talk, or can we just proceed with therapy?
The answer to that depends upon the rules and regulations of your treatment center or school, and whether or not insurance providers are involved. But in my opinion, as far as the actual therapy is concerned, you do not need a diagnosis to start. Just start. Time in treatment will tell you increasingly more about his abilities, and apraxia will be ruled in or ruled out.