Z42.1Billable

Encounter for breast reconstruction following mastectomy

Chapter
21. Factors influencing health status and contact with health services
Category
Z42
Effective date
October 1, 2026

Related codes in category Z42

Z42Encntr for plast/recnst surg fol med proc or healed injuryZ42.8Encntr for oth plast/recnst surg fol med proc or heal injuryYes

Frequently asked questions

What is ICD-10 code Z42.1?

Z42.1 is an ICD-10-CM diagnosis code for Encounter for breast reconstruction following mastectomy.

Is Z42.1 a billable code?

Yes. Z42.1 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is Z42.1 in?

Z42.1 falls under Chapter 21: Factors influencing health status and contact with health services.

When did Z42.1 become effective?

Z42.1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to Z42.1?

Z42.1 belongs to category Z42, which includes 2 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.