QA1.71 ICD-10-CM Code: Lynch syndrome
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
QA1.71Lynch syndrome
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where QA1.71 sits
- 1
Chapter 17
Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- 2
Section
Genetic disorders, not elsewhere classified (QA0-QA1)
- 3
Category QA1
Genetic disorders associated with neoplasms, not elsewhere classified
- 4
Subcategory QA1.7
Inherited neoplasm predisposition syndromes involving multiple systems, not elsewhere classified
- 5
Code QA1.71
Lynch syndrome
Documentation details
Notes for this code
Inclusion terms
- 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
Code first
No “code first” instruction is listed for QA1.71.
Use additional code
No “use additional code” instruction is listed for QA1.71.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for QA1.71.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for QA1.71.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code QA1.71 mean?
QA1.71 is the FY 2027 U.S. ICD-10-CM code for “Lynch syndrome.”
Is QA1.71 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, QA1.71 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is QA1.71 located in ICD-10-CM?
QA1.71 is listed in Chapter 17, Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1), within Genetic disorders, not elsewhere classified (QA0-QA1) (QA0–QA1), under category QA1, Genetic disorders associated with neoplasms, not elsewhere classified and subcategory QA1.7, Inherited neoplasm predisposition syndromes involving multiple systems, not elsewhere classified.
What coding notes are listed for QA1.71?
Its listed inclusion terms are 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. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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