2026 ICD-10-CM Diagnosis Code Q13.2Other congenital malformations of iris

ICD-10-CM Codes›Q00-Q99›Q10-Q18›Q13

ICD-10-CM Q13.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q13.2 is a billable ICD-10-CM diagnosis code for other congenital malformations of iris. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Congenital malformations of eye, ear, face, neck.

Code Identity

ICD-10-CM Code
Q13.2
Billable Status
Yes — Valid for Submission
Code Describes
Other congenital malformations of iris
Short Description
Other congenital malformations of iris
Same as the full description in the CMS dataset.
Parent Code
Q13
Congenital malformations of anterior segment of eye

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ10-Q18Congenital malformations of eye, ear, face and neck
CategoryQ13Congenital malformations of anterior segment of eye
This CodeQ13.2Other congenital malformations of iris

Present on Admission (POA)Billing

Q13.2 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anisocoria
  • Atresia of pupil
  • Bilateral congenital anomaly of pupil
  • Bilateral congenital hamartoma of irises
  • Congenital anisocoria
  • Congenital anomaly of iris
  • Congenital anomaly of left pupil
  • Congenital anomaly of pupil
  • Congenital anomaly of right pupil
  • Congenital aphakia
  • Congenital aphakia, iris hypoplasia, microphthalmia, microcornea syndrome
  • Congenital cyst of iris
  • Congenital ectopic pupil
  • Congenital hamartoma of iris
  • Congenital hamartoma of iris of left eye
  • Congenital hamartoma of iris of right eye
  • Congenital heterochromia iridis
  • Congenital hypoplasia of dilator pupillae muscle
  • Congenital miosis
  • Constricted pupil
  • Deformed pupil
  • Ectopic pupil
  • EDICT syndrome
  • Finding of proportion of pupil
  • Finding of pupil shape
  • Glaucoma due to iris anomaly
  • Glaucoma of bilateral eyes due to anterior segment anomaly
  • Glaucoma of bilateral eyes due to congenital anomaly of iris
  • Glaucoma of left eye due to anterior segment anomaly
  • Glaucoma of left eye due to congenital anomaly of iris
  • Glaucoma of right eye due to anterior segment anomaly
  • Glaucoma of right eye due to congenital anomaly of iris
  • Heterochromic iris
  • Hypoplasia of iris
  • Iris pigmentation - finding
  • Microcornea
  • Microcornea with corectopia and macular hypoplasia syndrome
  • Polycoria
  • Pseudo-polycoria
  • Ptosis, strabismus, ectopic pupil syndrome
  • Spastic ataxia with congenital miosis
  • Tadpole pupil
  • Teardrop pupil

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Anisocoria, congenital
  • Atresia of pupil
  • Congenital malformation of iris NOS
  • Corectopia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Anisocoria(pupil)
      • congenital
    • Anomaly, anomalous(congenital) (unspecified type)
      • iris
    • Anomaly, anomalous(congenital) (unspecified type)
      • opticociliary vessels
    • Anomaly, anomalous(congenital) (unspecified type)
      • pupil
    • Atresia, atretic
      • pupil
    • Corectopia
    • Deformity
      • iris (acquired)
        • congenital
    • Deformity
      • opticociliary vessels (congenital)
    • Deformity
      • pupil (congenital)
    • Heterochromia(congenital)
    • Malformation(congenital)
      • iris
    • Notch of iris
    • Polycoria

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MAL005
Congenital malformations of eye, ear, face, neck
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Anisocoria

    unequal pupil size, which may represent a benign physiologic variant or a manifestation of disease. pathologic anisocoria reflects an abnormality in the musculature of the iris (iris diseases) or in the parasympathetic or sympathetic pathways that innervate the pupil. physiologic anisocoria refers to an asymmetry of pupil diameter, usually less than 2mm, that is not associated with disease.

  • Iris Diseases

    diseases, dysfunctions, or disorders of or located in the iris.

  • Microcornea

    a congenital abnormality characterized by an abnormally small cornea. the horizontal corneal diameter is less than 10mm or less than 9mm in newborns. it is associated with an increased risk of glaucoma.

  • Congenital Aphakia

    the absence of the lens of the eye that is present at the time of birth.

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.

Convert Q13.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
743.46 Anom iris & cil body NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q13.2Overview

Is Q13.2 (Congenital malformations of anterior segment of eye) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other congenital malformations of iris on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q13.2 group to?

When other congenital malformations of iris is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q13.2 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for other congenital malformations of iris on inpatient claims.

What is the ICD-9 equivalent of Q13.2?

Under the General Equivalence Mappings, other congenital malformations of iris converts to ICD-9-CM 743.46 (anom iris & cil body NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.