Z12.31 — Encounter for screening mammogram for malignant neoplasm of breast

Z12.31

ICD-10 Chapter 21: Factors Influencing Health Status — illustrative image — Chapter 21: Factors influencing health status and contact with health services (Z00–Z99) — illustrative image

What this code means

An encounter for a screening mammogram to look for breast cancer in a woman without symptoms.

Also called: screening mammogram, breast cancer screening.

When this code is used

Used for encounter for screening mammogram for malignant neoplasm of breast.

Where it sits in ICD-10-CM

Code Z12.31 belongs to Chapter 21: Factors influencing health status and contact with health services, which covers codes Z00–Z99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related procedures & tests

Mammogram (screening)

Related anatomy

Breasts

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Frequently asked questions

What is ICD-10-CM code Z12.31?

Z12.31 is the ICD-10-CM diagnosis code for “Encounter for screening mammogram for malignant neoplasm of breast”. An encounter for a screening mammogram to look for breast cancer in a woman without symptoms.

When is code Z12.31 used?

Used for encounter for screening mammogram for malignant neoplasm of breast. It belongs to Chapter 21 of ICD-10-CM (Factors influencing health status and contact with health services).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.