Excludes1 pair
N41- vs N42.1
N41 and N42.1 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 N42.1
inflammatory diseases of prostate (N41.-)
N41
Inflammatory diseases of prostate
Not billable
- Chapter 14
- Diseases of the genitourinary system
- Section
- N40-N53
N42.1
Congestion and hemorrhage of prostate
Billable
- Chapter 14
- Diseases of the genitourinary system
- Section
- N40-N53
Indexed under
- Congestion, congestive › prostate (active)
- Hemorrhage, hemorrhagic › prostate
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