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QA1.71

QA1.71: Lynch syndrome

Billable / specific codeICD-10-CM

QA1.71 is a billable, specific ICD-10-CM code for lynch syndrome. It is valid for submission on a claim.

Check QA1.71 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Hereditary nonpolyposis colorectal cancer susceptibility
  • Lynch syndrome due to EPCAM
  • Lynch syndrome due to MLH1
  • Lynch syndrome due to MSH2
  • Lynch syndrome due to MSH6
  • Lynch syndrome due to PMS2

Excludes2 inherited from the categories above QA1.71

Not part of this code, but both may be coded when both are present.

Written on QA1: Genetic disorders associated with neoplasms, not elsewhere classified

  • multiple endocrine neoplasia [MEN] syndromes (E31.2-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Susceptibility to disease, genetic›hereditary nonpolyposis colorectal cancer
  • Syndrome›Lynch(due to EPCAM) (due to MLH1) (due to MSH2) (due to MSH6) (due to PMS2)

Code history

  • addedFY2024-FY2027

    Lynch syndrome

Other codes under QA1.7

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.