NPI Atlas

Q86 – Congenital malformation syndromes due to known exogenous causes, not elsewhere classified

ICD-10-CM 2027 diagnosis code · Other congenital malformations

Non-billable header

ICD-10-CM code Q86

Code: Q86 (claims format: Q86)
Description: Congenital malformation syndromes due to known exogenous causes, not elsewhere classified
Short description: Congen malform syndromes due to known exogenous causes, NEC
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
Block: Q80-Q89 Other congenital malformations

Billable codes under Q86

Q86 is a header code and cannot be used on claims. Choose the most specific code:

Q86.0 – Fetal alcohol syndrome (dysmorphic)Billable
Q86.1 – Fetal hydantoin syndromeBillable
Q86.2 – Dysmorphism due to warfarinBillable
Q86.8 – Other congenital malformation syndromes due to known exogenous causesBillable

Notes for Q86

Excludes2 (not included here):

iodine-deficiency-related hypothyroidism (E00-E02)
nonteratogenic effects of substances transmitted via placenta or breast milk (P04.-)

Frequently asked questions

What is ICD-10 code Q86?

Q86 is the ICD-10-CM code for congenital malformation syndromes due to known exogenous causes, not elsewhere classified, in the block Q80-Q89 (Other congenital malformations).

Is Q86 a billable code?

No. Q86 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.