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  6. 2024 ICD-10-CM Code M40.5

2024 ICD-10-CM Diagnosis Code M40.5

Lordosis, unspecified

ICD-10-CM Code:
M40.5
ICD-10 Code for:
Lordosis, unspecified
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the musculoskeletal system and connective tissue
    (M00–M99)
    • Deforming dorsopathies
      (M40-M43)
      • Kyphosis and lordosis
        (M40)

M40.5 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of lordosis, unspecified. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Unspecified diagnosis codes like M40.5 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Specific Coding Applicable to Lordosis, unspecified

Non-specific codes like M40.5 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for lordosis, unspecified:

  • Use M40.50 for Lordosis, unspecified, site unspecified - BILLABLE CODE

  • Use M40.55 for Lordosis, unspecified, thoracolumbar region - BILLABLE CODE

  • Use M40.56 for Lordosis, unspecified, lumbar region - BILLABLE CODE

  • Use M40.57 for Lordosis, unspecified, lumbosacral region - BILLABLE CODE

Clinical Information

  • Lordosis

    the anterior concavity in the curvature of the lumbar and cervical spine as viewed from the side. the term usually refers to abnormally increased curvature (hollow back, saddle back, swayback). it does not include lordosis as normal mating posture in certain animals ( = posture + sex behavior, animal).

Patient Education


Spine Injuries and Disorders

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 disks

Spinal diseases often cause pain when bone changes put pressure on the spinal cord or nerves. They can also limit movement. Treatments differ by disease, but sometimes they include back braces and surgery.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.