DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Q31 Congenital malformations of larynx

  • Header · not billable

Q31 is not billable. The category heads 7 billable codes in FY2027: the 7 codes directly below it.

Index → code

  • Laryngomalacia (congenital) → Q31.5
  • Laryngocele (congenital) (ventricular) → Q31.3
  • Agenesislarynx → Q31.8

Where it sits

  1. Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
  2. Q30-Q34 Congenital malformations of the respiratory system (Q30-Q34)
  3. Q31 Congenital malformations of larynx
Billable codes
7
Subdivisions
7
CC / MCC codes
6 / 0
HCC V28 codes
0
New FY2027
0
Index entries
66

Codes in Q31

  1. Q31.0
    Web of larynx
    BillableExempt
    Inclusion terms 3

    Inclusion terms

    • Glottic web of larynx
    • Subglottic web of larynx
    • Web of larynx NOS
  2. Q31.1
    Congenital subglottic stenosis
    BillableCCExempt
  3. Q31.2
    Laryngeal hypoplasia
    BillableCCExempt
  4. Q31.3
    Laryngocele
    BillableCCExempt
  5. Q31.5
    Congenital laryngomalacia
    BillableCCExempt
  6. Q31.8
    Other congenital malformations of larynx
    BillableCCExempt
    Inclusion terms 7

    Inclusion terms

    • Absence of larynx
    • Agenesis of larynx
    • Atresia of larynx
    • Congenital cleft thyroid cartilage
    • Congenital fissure of epiglottis
    • Congenital stenosis of larynx NEC
    • Posterior cleft of cricoid cartilage
  7. Q31.9
    Congenital malformation of larynx, unspecified
    BillableCCExempt

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At Q31

Excludes1

  • congenital laryngeal stridor NOS (P28.89) P28.89

Notes that also apply

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

Index entries

  • Laryngocele (congenital) (ventricular) → Q31.3
  • Laryngomalacia (congenital) → Q31.5
  • Web, webbed (congenital)larynx (glottic) (subglottic) → Q31.0
  • Hypoplasia, hypoplasticcricoid cartilage → Q31.2
  • Hypoplasia, hypoplasticepiglottis → Q31.2
  • Hypoplasia, hypoplasticglottis → Q31.2
  • Hypoplasia, hypoplasticlarynx → Q31.2
  • Sacculationintralaryngeal (congenital) (ventricular) → Q31.3
  • Sacculationlarynx (congenital) (ventricular) → Q31.3
  • Absence (of) (organ or part) (complete or partial)cricoid cartilage, congenital → Q31.8
  • Absence (of) (organ or part) (complete or partial)epiglottis, congenital → Q31.8
  • Absence (of) (organ or part) (complete or partial)glottis, congenital → Q31.8
  • Absence (of) (organ or part) (complete or partial)larynx (congenital) → Q31.8
  • Accessory (congenital)vocal cords → Q31.8
  • Agenesiscricoid cartilage → Q31.8
  • Agenesisepiglottis → Q31.8
  • Agenesisglottis → Q31.8
  • Agenesislarynx → Q31.8
  • Anomaly, anomalous (congenital) (unspecified type)aryteno-epiglottic folds → Q31.8
  • Anomaly, anomalous (congenital) (unspecified type)cricoid cartilage → Q31.8
  • Anomaly, anomalous (congenital) (unspecified type)epiglottis → Q31.8
  • Anomaly, anomalous (congenital) (unspecified type)glottis → Q31.8
  • Anomaly, anomalous (congenital) (unspecified type)valleculae → Q31.8
  • Atresia, atreticcricoid cartilage → Q31.8
  • Atresia, atreticepiglottis → Q31.8
  • Atresia, atreticglottis → Q31.8
  • Atresia, atreticlarynx → Q31.8
  • Atresia, atreticthyroid cartilage → Q31.8
  • Cleft (congenital)cricoid cartilage, posterior → Q31.8
  • Cleft (congenital)thyroid cartilage → Q31.8
  • Deformitycricoid cartilage (congenital) → Q31.8
  • Deformityepiglottis (congenital) → Q31.8
  • Deformitylarynx (muscle) (congenital) → Q31.8
  • Elongated, elongation (congenital)petiolus (epiglottidis) → Q31.8
  • Fissure, fissuredepiglottis (congenital) → Q31.8
  • Laryngofissurecongenital → Q31.8
  • Anomaly, anomalous (congenital) (unspecified type)larynx, laryngeal (muscle) → Q31.9
  • Anomaly, anomalous (congenital) (unspecified type)larynx, laryngeal (muscle)web (bed) → Q31.0
  • Deformitylarynx (muscle) (congenital)web (glottic) → Q31.0
  • Stenosis, stenotic (cicatricial)subglotticcongenital → Q31.1

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

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

Hierarchy