2025 ICD-10-CM Diagnosis Code Z12.31

Encounter for screening mammogram for malignant neoplasm of breast

• Z12.31 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• Short description: Encntr screen mammogram for malignant neoplasm of breast
• The 2025 edition of ICD-10-CM Z12.31 became effective on October 1, 2024.
• This is the American ICD-10-CM version of Z12.31 – other international versions of ICD-10 Z12.31 may differ.

Type 1 Excludes

• inconclusive mammogram (R92.2)

The following code(s) above Z12.31 contain annotation back-references

 that may be applicable to Z12.31:

• Z00-Z99  Factors influencing health status and contact with health services
• Z00-Z13  Persons encountering health services for examinations
• Z12  Encounter for screening for malignant neoplasms

Approximate Synonyms

• Screening mammogram for breast cancer
• Screening mammogram for breast cancer done
• Screening mammogram for breast cancer in high risk patient with family history of breast cancer done
• Screening mammogram for breast cancer, high risk with family history of cancer

Present On Admission

• Z12.31 is considered exempt from POA reporting.

ICD-10-CM Z12.31 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

• 951 Other factors influencing health status

Convert Z12.31 to ICD-9-CMCode History

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change
• 2024 (effective 10/1/2023): No change
• 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to Z12.31:

• Mammogram (examination) Z12.39
  • routine Z12.31
• Screening (for) Z13.9
  • neoplasm (malignant) (of) Z12.9
    • breastZ12.39
      • routine mammogram Z12.31
• X-ray (of)
  • breast Z12.31 (mammogram) (routine)