ICD-10-CM 2027 diagnosis code

QA1Genetic disorders associated with neoplasms, not elsewhere classified

Not billable — use a more specific codeNew for 2027

QA1 is a header code, so it can't be reported by itself. Choose one of the 1 more specific codes beneath it.Short description: Genetic disorders associated with neoplasms, NEC

Code last changed in FY2027 (effective October 1, 2026). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About QA1

QA1 is the ICD-10-CM diagnosis code for genetic disorders associated with neoplasms, not elsewhere classified. It belongs to block QA0-QA1 (genetic disorders, not elsewhere classified) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 1 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: QA1.7 (classified).

The conditions in its Excludes2 note aren't part of QA1, but may be coded alongside it if the patient has both: multiple endocrine neoplasia [MEN] syndromes (E31.2-).

It was added in FY2027, effective October 1, 2026.

Specific codes under QA1

QA1.7Inherited neoplasm predisposition syndromes involving multiple systems, not elsewhere classified
- QA1.71Lynch syndromeBillable
- QA1.79Other inherited neoplasm predisposition syndrome of multiple systems

Coding notes

Excludes2Not included here — may be reported together if both conditions exist

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

Code alsoTwo codes may be needed; sequencing depends on circumstances

, if applicable, any associated conditions, such as:
genetic susceptibility to malignant neoplasm by site (Z15.0-)
malignant neoplasms (C00.0-C96.9)
personal history of malignant neoplasm (Z85.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to QA1.

Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Code history

2016
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2027

FY2027 (effective 10/1/2026): Added

Common questions about QA1

Is QA1 billable?: No. QA1 is a header code. Report one of its more specific subcodes instead.
Did QA1 change for 2027?: Yes. For FY2027 (effective October 1, 2026) it was added to the code set.