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N64.5 vs R23

N64.5 (Other signs and symptoms in breast) compared with R23 (Other skin changes), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. R23 carries an Excludes2 note covering N64.5: “symptoms relating to breast (N64.4-N64.5)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

N64.5Other signs and symptoms in breastR23Other skin changes
Billing statusNon-billable header

Report instead: N64.51, N64.52, N64.53, N64.59

Non-billable header

Report instead: R23.0, R23.1, R23.2, R23.3, R23.4

ClassificationN00-N99 — Diseases of the Genitourinary System (N00-N99)R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99)
DefinitionOther signs and symptoms in breast is a non-billable ICD-10-CM category code (N64.5).Other skin changes is a non-billable ICD-10-CM category code (R23).
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources