FY2027
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Excludes1 pair

D07.5 vs N42-

D07.5 and N42 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 D07.5
dysplasia (mild) (moderate) of prostate (N42.3-)
D07.5

Carcinoma in situ of prostate

Billable
Chapter 2
Neoplasms
Section
D00-D09
Use when the record says
  • Prostatic intraepithelial neoplasia III (PIN III)
  • Severe dysplasia of prostate
Indexed under
  • Dysplasia › prostate › severe
  • Neoplasia › intraepithelial › prostate › grade III (severe dysplasia)
N42

Other and unspecified disorders of prostate

Not billable
Chapter 14
Diseases of the genitourinary system
Section
N40-N53

These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.

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