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Q86.8

Q86.8: Other congenital malformation syndromes due to known exogenous causes

Billable / specific codeICD-10-CMPOA exempt

Q86.8 is a billable, specific ICD-10-CM code for other congenital malformation syndromes due to known exogenous causes. It is valid for submission on a claim.

Check Q86.8 with the rest of the claim: free scrubber

Excludes2 inherited from the categories above Q86.8

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

Written on Q86: Congenital malformation syndromes due to known exogenous causes, not elsewhere classified

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

Risk adjustment

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

Alphabetic index entries that lead here

  • Dysmorphism›exogenous cause NEC
  • Syndrome›malformation, congenital, due to›exogenous cause NEC

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Q86

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.