Q86
ICD-10Non-billable categoryCongen malform syndromes due to known exogenous causes, NEC
Official ICD-10-CM descriptor (FY2026)
Congenital malformation syndromes due to known exogenous causes, not elsewhere classified
Q86 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- iodine-deficiency-related hypothyroidism (E00-E02)
- nonteratogenic effects of substances transmitted via placenta or breast milk (P04.-)
More specific codes under Q86
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.