This weeks studies is taking me through the HIV guidelines.
The way I understand it "V08 is AIDS (confirmed)" is not a correct statement. (Made above.)
042 is AIDS
042 is HIV infection symptomatic. It's placement will depend on whether the reason for the encounter is due to a HIV-related condition or unrelated condition. AIDS does not have to be confirmed for 042 to be used. Once a patient has a history of HIV positive symptom(s) you would use code 042 on every subsequent encounter regardless of the reason for the encounter- only its placement would vary.
V08 is HIV positive asymptomatic. Meaning patient has no history of HIV-related symptoms but is listed as "HIV positive", "known HIV", "HIV test-positive". Once that person presents with HIV-related symptom(s) then his status as asymptomatic changes and the code becomes 042 and will never go back to V08. The patient is now considered HIV infection symptomatic and can never go back to asymptomatic. This change in status though does not mean they have AIDS. Only that it has been recognized that the virus has begun its course even if in future they are again presenting without an HIV-related condition. Confirmation of AIDS is not necessary to use code 042. Even though HIV infection symptomatic and AIDS are not the same thing they do share the same code (042).
But, it is extremely important to never make the mistake of coding an individual who is HIV positive asymptomatic with 042.
Likewise it is important to understand that HIV and AIDS although coded 042 are not the same thing. They are just buddies, I guess, because you can't get the one without first getting the other.
BTW, does anyone know if in ICD-10, they have assigned HIV infection symptomatic and AIDS each their own unique codes?