M40.57 Lordosis, unspecified, lumbosacral region

ICD-10-CM Code M40.57: Lordosis, unspecified, lumbosacral region

ICD-10-CM code M40.57 designates an active diagnosis concept for lordosis in the lumbosacral region, classified as an anatomical abnormality or disease. It falls under the parent category M40.5. This reference summarizes terminology records and clinical literature to explain the code's structure and context. 1 3

Plain-language overview

Code M40.57 carries the preferred name lordosis, unspecified, lumbosacral region, providing a standardized diagnostic label for this particular anatomical location without further detail. 1

What this code represents

The code M40.57 represents a diagnosis or health-status concept classified under the semantic types of Anatomical Abnormality and Disease or Syndrome within the ICD-10-CM terminology. 1

Within the ICD-10-CM hierarchy, M40.57 is a narrower concept that falls under the parent code M40.5, which designates unspecified lordosis generally without regional distinction. 1

Documentation considerations

The official terminology record for M40.57 provides the preferred name and hierarchical status but does not list specific clinical documentation elements or rules required to support this code. 1

What the sources add

While the terminology record defines M40.57 structurally, the clinical literature excerpt discusses lumbosacral region anatomy in the context of degenerative scoliosis, nerve roots, and vertebral bodies rather than defining lordosis itself. 1 2

A separate terminology mapping source confirms that M40.57 maps to a Disease or Syndrome concept and provides cross-references between ICD-10-CM and other terminology systems. 3

Clinical context

A clinical article identifies the L4, L5, and S1 nerve roots as structures located within the lumbosacral region, noting their involvement in radicular symptoms for adult degenerative scoliosis patients. 2

Coverage and utilization context

The terminology record establishes M40.57 as an active concept within the ICD-10-CM version 2026, but the supplied excerpts do not contain payer-specific coverage policies or reimbursement rules. 1

Sources

1. ICD-10-CM M40.57 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. The correction range of lumbosacral curve vertebral body tilt in degenerative scoliosis for achieving postoperative coronal balance — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.