I11.9 is for hypertensive cardiovascular disease without heart failure. If my provider states that this is, in parentheses, "Complications due to hypertension," and the hypertension is primary, do I code both I10 and I11.9? Or is I11.9 sufficient? Whenever I11.9 is coded, is it necessary to identify the type of associated hypertension? I can't find any information on this.