Q78.9 Osteochondrodysplasia, unspecified

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

Applicable to

• Chondrodystrophy NOS
• Osteodystrophy NOS

Applies from Q78 Other osteochondrodysplasias

Excludes2 (not included here)

• congenital myotonic chondrodystrophy (G71.13)

MS-DRG index

Defines the logic of DRG(s) 564-566 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 756.50 Congenital osteodystrophy, unspecified (approximate)

Code annotations containing back-references to Q78.9

Back-references to Q78

• 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 Q78.9

• Anomaly, anomalous (congenital) (unspecified type) › skeleton generalized
• Anosteoplasia
• Chondrodysplasia
• Chondrodystrophy, chondrodystrophia (familial) (fetalis) (hypoplastic)
• Dysostosis › Fairbank's (idiopathic familial generalized osteophytosis)
• Osteochondrodysplasia
• Osteodystrophy
• Osteodystrophy › congenital
• Silfversköld's syndrome
• Syndrome › Silfversköld's

Nearby codes

• Q78.3 Progressive diaphyseal dysplasia
• Q78.4 Enchondromatosis
• Q78.5 Metaphyseal dysplasia
• Q78.6 Multiple congenital exostoses
• Q78.8 Other specified osteochondrodysplasias
• Q78.9 Osteochondrodysplasia, unspecified (this code)