Congenital malformation syndromes due to known exogenous causes, not elsewhere classified (Q86) ICD-10-CM
The Q86 code range covers congenital malformation syndromes due to known exogenous causes, not elsewhere classified with 5 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the Q86 Range 5 codes · 4 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q86 range.
Fetal Alcohol Syndrome
A condition occurring in FETUS or NEWBORN due to in utero ETHANOL exposure when mother consumed alcohol during pregnancy. It is characterized by a cluster of irreversible BIRTH DEFECTS including abnormalities in physical, mental, and behavior development (such as FETAL GROWTH RETARDATION; MENTAL RETARDATION; ATTENTION DEFICIT AND DISRUPTIVE BEHAVIOR DISORDERS) with varied degree of severity in an individual.
Fetal Hydantoin Syndrome
A teratogenic disorder observed in a newborn or child of a mother who was exposed to phenytoin during pregnancy. Manifestations include dysmorphic craniofacial features, hypoplastic distal phalanges and nails, growth delay and delayed psychomotor development.
About the Q86 Code Range
These are patterns of differences in body structure present at birth that are attributed to known outside causes.
The subdivisions separate fetal alcohol syndrome (Q86.0), fetal hydantoin syndrome (Q86.1), and differences in body form due to warfarin (Q86.2). Q86.8 groups other congenital malformation syndromes attributed to known outside causes.
Questions About This Page
How many billable codes are in the Q86 range?
Of the 5 codes in this range, 4 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the Q86 range classify?
The range classifies congenital malformation syndromes due to known exogenous causes, not elsewhere classified. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
