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N99.5 vs Z43

N99.5 (Complications of stoma of urinary tract) compared with Z43 (Encounter for attention to artificial openings), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Can these codes be reported together?

No — do not report together. Z43 carries an Excludes1 note covering N99.5: “complications of external stoma (J95.0-, K94.-, N99.5-)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Side by side

N99.5Complications of stoma of urinary tractZ43Encounter for attention to artificial openings
Billing statusNon-billable header

Report instead: N99.510, N99.511, N99.512, N99.518, N99.520

Non-billable header

Report instead: Z43.0, Z43.1, Z43.2, Z43.3, Z43.4

ClassificationN00-N99 — Diseases of the Genitourinary System (N00-N99)Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)
DefinitionComplications of stoma of urinary tract is a non-billable ICD-10-CM category code (N99.5).Encounter for attention to artificial openings is a non-billable ICD-10-CM category code (Z43).
Includes
closure of artificial openings
passage of sounds or bougies through artificial openings
reforming artificial openings
removal of catheter from artificial openings

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources