Q79.1 Other congenital malformations of diaphragm

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis. Exempt from present-on-admission (POA) reporting.

Applicable to

• Absence of diaphragm
• Congenital malformation of diaphragm NOS
• Eventration of diaphragm

Applies from Q79 Congenital malformations of musculoskeletal system, not elsewhere classified

Excludes2 (not included here)

• congenital (sternomastoid) torticollis (Q68.0)

MS-DRG index

Defines the logic of DRG(s) 205-206 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 756.6 Anomalies of diaphragm (approximate)

Code annotations containing back-references to Q79.1

Back-references to Q79.1

• Type 1 Excludes: J98.6 Disorders of diaphragm ("congenital malformation of diaphragm NEC (Q79.1)")

Back-references to Q79

• Type 1 Excludes: M24.3 Pathological dislocation of joint, not elsewhere classified ("congenital dislocation or displacement of joint- see congenital malformations and deformations of the musculoskeletal system (Q65-Q79)")
• Type 2 Excludes: M95 Other acquired deformities of musculoskeletal system and connective tissue ("congenital malformations and deformations of the musculoskeletal system (Q65-Q79)")

Diagnosis Index entries for Q79.1

• Abnormal, abnormality, abnormalities › apertures, congenital, diaphragm
• Absence (of) (organ or part) (complete or partial) › diaphragm (with hernia), congenital
• Agenesis › diaphragm (with hernia)
• Anomaly, anomalous (congenital) (unspecified type) › diaphragm (apertures) NEC
• Defect, defective › diaphragm › congenital
• Deformity › diaphragm (congenital)
• Elevated, elevation › diaphragm, congenital
• Enlargement, enlarged › apertures of diaphragm (congenital)
• Eventration › diaphragm (congenital)
• High › diaphragm (congenital)
• Hypertrophy, hypertrophic › esophageal hiatus (congenital)
• Hypertrophy, hypertrophic › hiatus (esophageal)
• Malformation (congenital) › diaphragm

Nearby codes

• Q79 Congenital malformations of musculoskeletal system, not elsewhere classified
• Q79.0 Congenital diaphragmatic hernia
• Q79.1 Other congenital malformations of diaphragm (this code)
• Q79.2 Exomphalos
• Q79.3 Gastroschisis
• Q79.4 Prune belly syndrome
• Q79.5 Other congenital malformations of abdominal wall
• Q79.51 Congenital hernia of bladder