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Q86.1

Q86.1Fetal hydantoin syndrome

Billable / specific codeICD-10-CMPOA exempt

Q86.1 is a billable, specific ICD-10-CM code for fetal hydantoin syndrome. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Meadow's syndrome

Other codes that can never be billed with Q86.1

These codes carry an Excludes1 note pointing at Q86.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q86.1 alone.

  • P04.1Newborn affected by other maternal medication

Risk adjustment

Q86.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How Q86.1 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q86.1.

  • Meadow's syndrome
  • Dysmorphismhydantoin
  • Fetus, fetalhydantoin syndrome
  • Syndromefetalhydantoin
  • Syndromemalformation, congenital, due tohydantoin

Related codes at this level

Codes that share Q86. If Q86.1 is not quite right, the correct code is usually one of these.

Questions about Q86.1

Is Q86.1 a billable ICD-10-CM code?
Yes. Q86.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q86.1 sit in the tabular list?
Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Other congenital malformations (Q80-Q89).
ICD-10-CMFY2026-Apr· effective April 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.