DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Q79 Congenital malformations of musculoskeletal system, not elsewhere classified

  • Header · not billable

Q79 is not billable. The category heads 14 billable codes in FY2027, grouped under 9 subdivisions.

Index → code

Where it sits

  1. Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
  2. Q65-Q79 Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)
  3. Q79 Congenital malformations of musculoskeletal system, not elsewhere classified
Billable codes
14
Subdivisions
9
CC / MCC codes
5 / 7
HCC V28 codes
0
New FY2027
0
Index entries
97

Codes in Q79

  1. Q79.0
    Congenital diaphragmatic hernia
    BillableMCCExempt
    Excludes1 1

    Excludes1

    • congenital hiatus hernia (Q40.1) Q40.1
  2. Q79.1
    Other congenital malformations of diaphragm
    BillableMCCExempt
    Inclusion terms 3

    Inclusion terms

    • Absence of diaphragm
    • Congenital malformation of diaphragm NOS
    • Eventration of diaphragm
  3. Q79.2
    Exomphalos
    BillableMCCExempt
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Omphalocele

    Excludes1

    • umbilical hernia (K42.-) K42
  4. Q79.3
    Gastroschisis
    BillableMCCExempt
  5. Q79.4
    Prune belly syndrome
    BillableMCCExempt
    Inclusion terms 2

    Inclusion terms

    • Congenital prolapse of bladder mucosa
    • Eagle-Barrett syndrome
  6. Q79.5
    Other congenital malformations of abdominal wall
    Header
    Excludes1 1

    Excludes1

    • umbilical hernia (K42.-) K42
  7. Q79.51
    Congenital hernia of bladder
    BillableMCCExempt
  8. Q79.59
    Other congenital malformations of abdominal wall
    BillableMCCExempt
  9. Q79.6
    Ehlers-Danlos syndromes
    Header
  10. Q79.60
    Ehlers-Danlos syndrome, unspecified
    BillableCCExempt
  11. Q79.61
    Classical Ehlers-Danlos syndrome
    BillableCCExempt
    Inclusion terms 1

    Inclusion terms

    • Classical EDS (cEDS)
  12. Q79.62
    Hypermobile Ehlers-Danlos syndrome
    BillableCCExempt
    Inclusion terms 1

    Inclusion terms

    • Hypermobile EDS (hEDS)
  13. Q79.63
    Vascular Ehlers-Danlos syndrome
    BillableCCExempt
    Inclusion terms 1

    Inclusion terms

    • Vascular EDS (vEDS)
  14. Q79.69
    Other Ehlers-Danlos syndromes
    BillableCCExempt
  15. Q79.8
    Other congenital malformations of musculoskeletal system
    BillableExempt
    Inclusion terms 7

    Inclusion terms

    • Absence of muscle
    • Absence of tendon
    • Accessory muscle
    • Amyotrophia congenita
    • Congenital constricting bands
    • Congenital shortening of tendon
    • Poland syndrome
  16. Q79.9
    Congenital malformation of musculoskeletal system, unspecified
    BillableExempt
    Inclusion terms 2

    Inclusion terms

    • Congenital anomaly of musculoskeletal system NOS
    • Congenital deformity of musculoskeletal system NOS

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 Q79

Excludes2

  • congenital (sternomastoid) torticollis (Q68.0) Q68.0

Notes that also apply

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

Index entries

  • Exomphalos → Q79.2
  • Omphalocele → Q79.2
  • Sarcoepiplomphalocele → Q79.2
  • Gastroschisis (congenital) → Q79.3
  • Prune belly (syndrome) → Q79.4
  • Danlos' syndrome → Q79.60
  • Dermatorrhexis → Q79.60
  • Ehlers-Danlos syndrome → Q79.60
  • Meekeren-Ehlers-Danlos syndrome → Q79.69
  • Acromicria, acromikria → Q79.8
  • Amyoplasia congenita → Q79.8
  • Myelo-osteo-musculodysplasia hereditaria → Q79.8
  • Poland syndrome → Q79.8
  • Thoracogastroschisis (congenital) → Q79.8
  • Touraine's syndrome → Q79.8
  • Abnormal, abnormality, abnormalitiesapertures, congenital, diaphragm → Q79.1
  • Absence (of) (organ or part) (complete or partial)diaphragm (with hernia), congenital → Q79.1
  • Agenesisdiaphragm (with hernia) → Q79.1
  • Anomaly, anomalous (congenital) (unspecified type)diaphragm (apertures) NEC → Q79.1
  • Deformitydiaphragm (congenital) → Q79.1
  • Elevated, elevationdiaphragm, congenital → Q79.1
  • Enlargement, enlargedapertures of diaphragm (congenital) → Q79.1
  • Eventrationdiaphragm (congenital) → Q79.1
  • Highdiaphragm (congenital) → Q79.1
  • Hypertrophy, hypertrophicesophageal hiatus (congenital) → Q79.1
  • Hypertrophy, hypertrophichiatus (esophageal) → Q79.1
  • Malformation (congenital)diaphragm → Q79.1
  • Abdomen, abdominalmuscle deficiency syndrome → Q79.4
  • Aplasiaabdominal muscle syndrome → Q79.4
  • Deficiency, deficientabdominal muscle syndrome → Q79.4
  • SyndromeEagle-Barrett → Q79.4
  • Syndromeprune belly → Q79.4
  • Anomaly, anomalous (congenital) (unspecified type)abdominal wall NEC → Q79.59
  • Defect, defectiveabdominal wall, congenital → Q79.59
  • SyndromeMeekeren-Ehlers-Danlos → Q79.6
  • SyndromeDanlos' → Q79.60
  • SyndromeEhlers-Danlos → Q79.60
  • Absence (of) (organ or part) (complete or partial)muscle (congenital) (pectoral) → Q79.8
  • Absence (of) (organ or part) (complete or partial)tendon (congenital) → Q79.8
  • Accessory (congenital)bone NEC → Q79.8

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

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

Hierarchy