I79.0** Asterisk (manifestation)
Aneurysm of aorta in diseases classified elsewhere
Coding rules (TT06)
- ●Cannot be used as primary diagnosis
Dual coding (†/*)
This is an asterisk (*) manifestation code — usually paired with a dagger (†) etiology code.
Paired codesA52.0†Cardiovascular syphilis
→ Full dagger (†) ↔ asterisk (*) mapping tableCoding guidance (WHO 2019)
Syphilitic aneurysm of aorta (A52.0†)