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Z91.A3

✓ Billable

Caregiver's unintentional underdosing of patient's medication regimen

Factors influencing health status and contact with health services (Z00-Z99)

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📋 Code Instructions

  • • Code first: underdosing of medication (T36-T50) with fifth or sixth character 6

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Code Information

CodeZ91.A3
BillableYes
ParentZ91.A
CategoryFactors influencing health status and contact with health services (Z00-Z99)
Excludes10 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)