2027 ICD-10-CM Diagnosis Code Q12Congenital lens malformations

ICD-10-CM Codes›Q00-Q99›Q10-Q18›Q12

ICD-10-CM Q12
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q12 is a non-billable ICD-10-CM category code for congenital lens malformations, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q12.0, Q12.1, Q12.2, and Q12.3.

Code Identity

ICD-10-CM Code
Q12
Billable Status
No — Non-Billable Category
Code Describes
Congenital lens malformations
Short Description
Congenital lens malformations
Same as the full description in the CMS dataset.
Chapter
Q10-Q18
Congenital malformations of eye, ear, face and neck

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ10-Q18Congenital malformations of eye, ear, face and neck
CategoryQ12Congenital lens malformations
This CodeQ12Congenital lens malformations

Specific Coding for Congenital lens malformationsOverview

Non-specific codes like Q12 require more characters. Use one of these billable codes instead:

  • Use Q12.0 for Congenital cataract

  • Use Q12.1 for Congenital displaced lens

  • Use Q12.2 for Coloboma of lens

  • Use Q12.3 for Congenital aphakia

  • Use Q12.4 for Spherophakia

  • Use Q12.8 for Other congenital lens malformations

  • Use Q12.9 for Congenital lens malformation, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q12: its own notes plus those printed at block Q10-Q18 and 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.

From Block Q10-Q18 Congenital malformations of eye, ear, face and neck applies to 62 codes
  • cleft lip and cleft palate (Q35-Q37)
  • congenital malformation of cervical spine (Q05.0, Q05.5, Q67.5, Q76.0-Q76.4)
  • congenital malformation of larynx (Q31.-)
  • congenital malformation of lip NEC (Q38.0)
  • congenital malformation of nose (Q30.-)
  • congenital malformation of parathyroid gland (Q89.2)
  • congenital malformation of thyroid gland (Q89.2)
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.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Q12, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming Q12: they are not reported together with it, unless the two conditions are unrelated.

  • H27 Other disorders of lens
    congenital lens malformations (Q12.-)

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 Q12Overview

What is the ICD-10 code for congenital lens malformations?

Q12 is the ICD-10-CM category for congenital lens malformations, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is Q12 (Congenital lens malformations) a billable code?

No. This is a category header that groups the codes for congenital lens malformations, and headers cannot be submitted on claims. Claims for congenital lens malformations need a more specific code from this category, such as Q12.0, Q12.1, and Q12.2.