ICD-10-CM 2027
ICD-10 code for thoracolumbar region lordosis
From the official ICD-10-CM alphabetic index entry “Lordosis › thoracolumbar region”. Page updated September 29, 2026.
About coding thoracolumbar region lordosis
The ICD-10-CM code for thoracolumbar region lordosis is M40.55 (Lordosis, unspecified, thoracolumbar region).
Within M40.5 (lordosis, unspecified), M40.55 is specifically for lordosis, unspecified, thoracolumbar region. Related codes cover site unspecified (M40.50), lumbar region (M40.56) and lumbosacral region (M40.57).
Code first: underlying disease.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about thoracolumbar region lordosis ICD-10 codes
What is the ICD-10 code for thoracolumbar region lordosis?
- M40.55 — Lordosis, unspecified, thoracolumbar region.
Is M40.55 billable?
- Yes. M40.55 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M40.55 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M40.55 as a principal diagnosis.
Is M40.55 a CC or MCC?
- No. M40.55 is neither a CC nor an MCC under MS-DRG v44.0.