Our library had a few editions up to current. It appears the most changes occur in medications...new insulin, ways to take insulin, New meters, etc. so the 2003 is fine for the information you want.

If you ever want more, his Diabetes University is amazing, everything he knows about diabetes saved for posterity. https://forum.lowcarber.org/showthread.php?t=470804
He finished that and still had more to say while sharp and practicing...so he continues on FB Live video! They are hour long Teleseminars, every month, answering questions.