Q79.8 Other congenital malformations of musculoskeletal system

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Absence of muscle
• Absence of tendon
• Accessory muscle
• Amyotrophia congenita
• Congenital constricting bands
• Congenital shortening of tendon
• Poland syndrome

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) 564-566 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 756.81 Absence of muscle and tendon (approximate)
• 756.82 Accessory muscle (approximate)
• 756.89 Other specified anomalies of muscle, tendon, fascia, and connective tissue (approximate)
• 756.9 Other and unspecified anomalies of musculoskeletal system (approximate)

Code annotations containing back-references to Q79.8

Back-references to Q79.8

• Type 2 Excludes: Q83 Congenital malformations of breast ("absence of pectoral muscle (Q79.8)")

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 Q79.8

• Absence (of) (organ or part) (complete or partial) › muscle (congenital) (pectoral)
• Absence (of) (organ or part) (complete or partial) › tendon (congenital)
• Accessory (congenital) › bone NEC
• Accessory (congenital) › muscle
• Accessory (congenital) › tendon
• Acromicria, acromikria
• Agenesis › muscle
• Agenesis › musculoskeletal system NEC
• Agenesis › tendon
• Amyoplasia congenita
• Amyotrophia, amyotrophy, amyotrophic › congenita
• Band (s) › constricting, congenital
• Contraction (s), contracture, contracted › ligament › congenital
• Contraction (s), contracture, contracted › muscle (postinfective) (postural) NEC › congenital
• Diastasis › muscle › congenital
• Dysplasia › muscle
• Fusion, fused (congenital) › bone
• Hypoplasia, hypoplastic › muscle
• Krabbe's › syndrome, congenital muscle hypoplasia
• Myelo-osteo-musculodysplasia hereditaria
• Poland syndrome
• Short, shortening, shortness › tendon › congenital
• Supernumerary (congenital) › bone
• Supernumerary (congenital) › muscle
• Syndrome › Krabbe's congenital muscle hypoplasia
• Syndrome › Touraine's
• Thoracogastroschisis (congenital)
• Touraine's syndrome

Nearby codes

• Q79.60 Ehlers-Danlos syndrome, unspecified
• Q79.61 Classical Ehlers-Danlos syndrome
• Q79.62 Hypermobile Ehlers-Danlos syndrome
• Q79.63 Vascular Ehlers-Danlos syndrome
• Q79.69 Other Ehlers-Danlos syndromes
• Q79.8 Other congenital malformations of musculoskeletal system (this code)
• Q79.9 Congenital malformation of musculoskeletal system, unspecified