I'm wondering if pehaps the "unstageable" is being mis-applied. To be unstageable, the ulcer stage would be obscured, such as by eschar. The concept of unstageable is similar to "unspecified" except the provider is unable to determine the depth due to the ulcer not being open to view. Because the level of severity is not able to be determined there is no severity weight attached to the code. Yes, you may not assign two levels of severity codes to the same ulcer because one ulcer can not have two different levels of severity. If, however, there are two or more different ulcers, a level of severity code would be assigned for each.
Randy, BSN, RN, CCS