Excludes1 pair
A30- vs B92
A30 and B92 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on A30
sequelae of leprosy (B92)
A30
Leprosy [Hansen's disease]
Not billable
- Chapter 1
- Certain infectious and parasitic diseases
- Section
- A30-A49
Use when the record says
- infection due to Mycobacterium leprae
B92
Sequelae of leprosy
Billable
- Chapter 1
- Certain infectious and parasitic diseases
- Section
- B90-B94
Indexed under
- Sequelae › Hansen's disease
- Sequelae › leprosy
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027