(Same as post in Dx coding forum.)

Am currently auditing HCC: 250.70 (DM w/peripheral circulatory disorders). It was linked w/443.9 (PVD NOS) but another "professional source" claims that 250.7x can ONLY be linked w/either 785.4 (gangrene) or 443.81 (peripheral angiopathy) as listed in the book. More often than not, when I have coded 250.7x previously, it's linked w/443.9 over 443.81.

In relation to the diabetes manifestation codes that require "additional code to ID manifestion", are the lists of examples shown in ICD-9 the ONLY codes I can use?