M41.55 Other secondary scoliosis, thoracolumbar region

Billable ICD-10-CM code, FY2026.

Applies from M41 Scoliosis

Includes

• kyphoscoliosis

Excludes1 (never code together)

• congenital scoliosis NOS (Q67.5)
• congenital scoliosis due to bony malformation (Q76.3)
• postural congenital scoliosis (Q67.5)
• kyphoscoliotic heart disease (I27.1)

Excludes2 (not included here)

• postprocedural scoliosis (M96.89)
• postradiation scoliosis (M96.5)

Applies from M41.5 Other secondary scoliosis

Code first

• underlying disease

MS-DRG index

Defines the logic of DRG(s) 456-458 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 737.43 Scoliosis associated with other conditions (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Code annotations containing back-references to M41.55

Back-references to M41

• Type 1 Excludes: M40 Kyphosis and lordosis ("kyphoscoliosis (M41.-)")
• Type 2 Excludes: M43.8 Other specified deforming dorsopathies ("scoliosis (M41.-)")
• Type 2 Excludes: M95 Other acquired deformities of musculoskeletal system and connective tissue ("deforming dorsopathies (M40-M43)")

Diagnosis Index entries for M41.55

• Scoliosis (acquired) (postural) › secondary (to) NEC › thoracolumbar region

Nearby codes

• M41.5 Other secondary scoliosis
• M41.50 Other secondary scoliosis, site unspecified
• M41.52 Other secondary scoliosis, cervical region
• M41.53 Other secondary scoliosis, cervicothoracic region
• M41.54 Other secondary scoliosis, thoracic region
• M41.55 Other secondary scoliosis, thoracolumbar region (this code)
• M41.56 Other secondary scoliosis, lumbar region
• M41.57 Other secondary scoliosis, lumbosacral region
• M41.8 Other forms of scoliosis
• M41.80 Other forms of scoliosis, site unspecified
• M41.82 Other forms of scoliosis, cervical region