DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Q13 Congenital malformations of anterior segment of eye

  • Header · not billable

Q13 is not billable. The category heads 9 billable codes in FY2027, grouped under 8 subdivisions.

Index → code

Where it sits

  1. Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
  2. Q10-Q18 Congenital malformations of eye, ear, face and neck (Q10-Q18)
  3. Q13 Congenital malformations of anterior segment of eye
Billable codes
9
Subdivisions
8
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
51

Codes in Q13

  1. Q13.0
    Coloboma of iris
    BillableExempt
    Inclusion terms 1

    Inclusion terms

    • Coloboma NOS
  2. Q13.1
    Absence of iris
    BillableExempt
    Inclusion terms 1, Use additional code 1

    Inclusion terms

    • Aniridia

    Use additional code

    • code for associated glaucoma (H42) H42
  3. Q13.2
    Other congenital malformations of iris
    BillableExempt
    Inclusion terms 4

    Inclusion terms

    • Anisocoria, congenital
    • Atresia of pupil
    • Congenital malformation of iris NOS
    • Corectopia
  4. Q13.3
    Congenital corneal opacity
    BillableExempt
  5. Q13.4
    Other congenital corneal malformations
    BillableExempt
    Inclusion terms 3

    Inclusion terms

    • Congenital malformation of cornea NOS
    • Microcornea
    • Peter's anomaly
  6. Q13.5
    Blue sclera
    BillableExempt
  7. Q13.8
    Other congenital malformations of anterior segment of eye
    Header
  8. Q13.81
    Rieger anomaly
    BillableExempt
    Inclusion terms 1, Use additional code 1, Code also 1

    Inclusion terms

    • Axenfeld-Rieger syndrome

    Use additional code

    • code for associated glaucoma (H42) H42

    Code also

    • any other associated congenital malformations such as cardiac defects
  9. Q13.89
    Other congenital malformations of anterior segment of eye
    BillableExempt
  10. Q13.9
    Congenital malformation of anterior segment of eye, unspecified
    BillableExempt

Sources of each column.

Instructions

Notes that also apply

Block Q10-Q18 instructions (Excludes2 7): printed on the block page.

Chapter 17 instructions (Notes 1, Excludes2 1): printed on the chapter 17 page.

Index entries

  • Coloboma (iris) → Q13.0
  • Aniridia (congenital) → Q13.1
  • Irideremia → Q13.1
  • Corectopia → Q13.2
  • Heterochromia (congenital) → Q13.2
  • Notch of iris → Q13.2
  • Polycoria → Q13.2
  • Embryotoxon → Q13.4
  • Keratomegaly → Q13.4
  • Microcornea (congenital) → Q13.4
  • Peter's anomaly → Q13.4
  • Rieger anomaly or syndrome → Q13.81
  • Mesostromal dysgenesia → Q13.89
  • Pupillary membrane (persistent) → Q13.89
  • Absence (of) (organ or part) (complete or partial)iris, congenital → Q13.1
  • Agenesisiris (dilator fibers) → Q13.1
  • Aplasiairis → Q13.1
  • Anisocoria (pupil)congenital → Q13.2
  • Anomaly, anomalous (congenital) (unspecified type)iris → Q13.2
  • Anomaly, anomalous (congenital) (unspecified type)opticociliary vessels → Q13.2
  • Anomaly, anomalous (congenital) (unspecified type)pupil → Q13.2
  • Atresia, atreticpupil → Q13.2
  • Deformityopticociliary vessels (congenital) → Q13.2
  • Deformitypupil (congenital) → Q13.2
  • Malformation (congenital)iris → Q13.2
  • Anomaly, anomalous (congenital) (unspecified type)cornea (shape) → Q13.4
  • Anomaly, anomalous (congenital) (unspecified type)Peter's → Q13.4
  • Axenfeld'sdegeneration (calcareous) → Q13.4
  • Corneaplana → Q13.4
  • Keratectasiacongenital → Q13.4
  • Keratoconuscongenital → Q13.4
  • Malformation (congenital)cornea → Q13.4
  • Bluesclera → Q13.5
  • Anomaly, anomalous (congenital) (unspecified type)Rieger → Q13.81
  • SyndromeAxenfeld-Rieger → Q13.81
  • Defect, defectiveDescemet's membrane, congenital → Q13.89
  • Membranacapsularis lentis posterior → Q13.89
  • Persistence, persistent (congenital)pupillary membrane → Q13.89
  • Glaucomain (due to)aniridia → Q13.1 [H42]
  • Deformityiris (acquired)congenital → Q13.2

11 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy