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ICD-10-CM category Z42: Encounter for plastic and reconstructive surgery following medical procedure or healed injury

Category Z42 is a heading in chapter 21 (Factors influencing health status and contact with health services (Z00-Z99)), section Encounters for other specific health care (Z40-Z53). It is not billable; report one of the 2 complete codes below.

Notes that apply to every Z42 code

Excludes1 (never coded together)
  • encounter for cosmetic plastic surgery (Z41.1)
  • encounter for plastic surgery for treatment of current injury - code to relevent injury

Billable codes in Z42

Billable FY2027 ICD-10-CM codes in category Z42
CodeDescription
Z42.1Encounter for breast reconstruction following mastectomy
Z42.8Encounter for other plastic and reconstructive surgery following medical procedure or healed injury

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Codes from the FY2027 ICD-10-CM files (all chapters). Report the code that matches the documentation and the Official Guidelines; this list is not coding advice.