2027 ICD-10-CM Diagnosis Code Q86Congenital malformation syndromes due to known exogenous causes, not elsewhere classified

ICD-10-CM Codes›Q00-Q99›Q80-Q89›Q86

ICD-10-CM Q86
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q86 is a non-billable ICD-10-CM category code for congenital malformation syndromes due to known exogenous causes, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q86.0, Q86.1, Q86.2, and Q86.8.

Code Identity

ICD-10-CM Code
Q86
Billable Status
No — Non-Billable Category
Code Describes
Congenital malformation syndromes due to known exogenous causes, not elsewhere classified
Short Description
Congen malform syndromes due to known exogenous causes, NEC
Chapter
Q80-Q89
Other congenital malformations

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ80-Q89Other congenital malformations
CategoryQ86Congenital malformation syndromes due to known exogenous causes, not elsewhere classified
This CodeQ86Congenital malformation syndromes due to known exogenous causes, not elsewhere classified

Specific Coding for Congen malform syndromes due to known exogenous causes, NECOverview

Non-specific codes like Q86 require more characters. Use one of these billable codes instead:

  • Use Q86.0 for Fetal alcohol syndrome (dysmorphic)

  • Use Q86.1 for Fetal hydantoin syndrome

  • Use Q86.2 for Dysmorphism due to warfarin

  • Use Q86.8 for Other congenital malformation syndromes due to known exogenous causes

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q86: its own notes plus those printed at Chapter 17. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On Q86 itself
  • iodine-deficiency-related hypothyroidism (E00-E02)
  • nonteratogenic effects of substances transmitted via placenta or breast milk (P04.-)
From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • inborn errors of metabolism (E70-E88)

Notes

General instructions on how these codes are used.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • Codes from this chapter are not for use on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Patient EducationClinical

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

The full article covers:

  • What are birth defects?
  • What causes birth defects?
  • Who is at risk of having a baby with birth defects?
  • How are birth defects diagnosed?
  • What are the treatments for birth defects?
  • Can birth defects be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Q86Overview

Is Q86 a billable code?

No. This is a category header that groups the codes for congenital malformation syndromes due to known exogenous causes, not elsewhere classified, and headers cannot be submitted on claims. Claims for congenital malformation syndromes due to known exogenous causes, not elsewhere classified need a more specific code from this category, such as Q86.0, Q86.1, and Q86.2.