M40

Non-billable

Kyphosis and lordosis

M40 is the ICD-10-CM code for Kyphosis and lordosis. It is a non-billable category code — use a more specific child code such as M40.0 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Subcodes
6
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

What this means — in plain language

MedlinePlus · NIH

Your backbone, or spine, is made up of 26 bone discs called vertebrae. The vertebrae protect your spinal cord and allow you to stand and bend. A number of problems can change the structure of the spine or damage the vertebrae and surrounding tissue. They include: Infections Injuries Tumors Conditions, such as ankylosing spondylitis and scoliosis Bone changes that come with age, such as spinal stenosis and herniated…

Read more about Spine Injuries and Disorders at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • congenital kyphosis and lordosis (Q76.4)
  • kyphoscoliosis (M41.-)
  • postprocedural kyphosis and lordosis (M96.-)

Code first

  • underlying disease

Frequently asked questions

What is ICD-10 code M40?
M40 is the ICD-10-CM code for "Kyphosis and lordosis". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M40 a billable code?
No — M40 is a non-billable header code. Use a more specific child code (such as M40.0) for billing.
What are the subcodes of M40?
M40 has 6 more specific child codes, including M40.0, M40.1, M40.2.
What is excluded from M40?
Excludes1 (not coded here): congenital kyphosis and lordosis (Q76.4); kyphoscoliosis (M41.-); postprocedural kyphosis and lordosis (M96.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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