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    v1.0.28
    OpenPayerBilling CodesDeforming dorsopathiesICD-10-CM m40-kyphosis-and-lordosis
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    ICD-10-CM Code For Kyphosis And Lordosis: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group M40 includes kyphosis and lordosis diagnoses, covering abnormal sagittal curvatures of the spine such as increased thoracic kyphosis and excessive lumbar lordosis. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving spinal curvature deformities, capturing severity, associated neurological involvement, and need for corrective or supportive interventions. Accurate coding within the ICD-10-CM M40 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM M40: Kyphosis And Lordosis Overview

    The ICD-10-CM M40 group covers deforming dorsopathies specifically kyphosis and lordosis, conditions involving abnormal curvature of the spine. These diagnoses affect the thoracic and lumbar regions and can be congenital or acquired due to degenerative disease, trauma, or neuromuscular conditions. Accurate coding matters for reimbursement because it ensures clinical complexity and severity are properly documented for payers.

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    When to Use

    Use a code from this group when a patient has a documented diagnosis of abnormal thoracic or lumbar curvature consistent with kyphosis or lordosis. Codes are applied to reflect the etiology, severity, and any associated neurological or structural complications when documented in the medical record.

    ICD-10-CM Codes

    31 rows

    ICD-10-CM CodeDescription
    M40.00Postural kyphosis, site unspecified
    M40.03Postural kyphosis, cervicothoracic region
    M40.04Postural kyphosis, thoracic region
    M40.05Postural kyphosis, thoracolumbar region
    M40.10Other secondary kyphosis, site unspecified
    M40.12Other secondary kyphosis, cervical region
    M40.13Other secondary kyphosis, cervicothoracic region
    M40.14Other secondary kyphosis, thoracic region
    M40.15Other secondary kyphosis, thoracolumbar region
    M40.202Unspecified kyphosis, cervical region
    M40.203Unspecified kyphosis, cervicothoracic region
    M40.204Unspecified kyphosis, thoracic region
    M40.205Unspecified kyphosis, thoracolumbar region
    M40.209Unspecified kyphosis, site unspecified
    M40.292Other kyphosis, cervical region
    M40.293Other kyphosis, cervicothoracic region
    M40.294Other kyphosis, thoracic region
    M40.295Other kyphosis, thoracolumbar region
    M40.299Other kyphosis, site unspecified
    M40.30Flatback syndrome, site unspecified

    Showing 1–20 of 31

    DRG Codes

    5 rows

    DRG CodeDescription
    456Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with MCC
    457Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with CC
    458Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions without CC/MCC
    551Medical Back Problems with MCC
    552Medical Back Problems without MCC

    Typical Clinical Scenarios

    • Older adult with progressive thoracic spinal curvature and back pain: A 72-year-old patient presents to primary care with several years of slowly worsening forward rounding of the upper back, decreased height, chronic mid‑back pain, and reduced pulmonary excursions. Examination shows a fixed kyphotic deformity without recent trauma; imaging demonstrates thoracic kyphosis due to degenerative changes. A deforming dorsopathy code for kyphosis is assigned to capture the chronic structural spinal curvature. Typical codes: M40.00, M40.03
    • Adolescent with Scheuermann-related rigid kyphosis seeking specialty care: A 15-year-old athlete develops progressive thoracic hyperkyphosis with focal vertebral wedging, persistent mid‑back pain limiting activity, and documented rigid deformity on radiographs; referral is made for orthopedics for consideration of bracing or surgical correction. Because this is a structural kyphotic deformity in a young patient with specific vertebral changes, a code identifying kyphosis with site specificity is used. Typical codes: M40.10, M40.12
    • Patient with combined sagittal plane deformities and neurological symptoms as a comorbidity: A 65-year-old patient with longstanding lumbar lordosis and thoracic kyphosis presents for preoperative evaluation for spinal stenosis; their altered spinal alignment contributes to imbalance and new radicular leg pain and functional decline. Coding captures the coexisting deforming dorsopathy (lordosis/kyphosis) as a comorbidity that affects management and surgical planning. Typical codes: M40.30, M40.35

    Related Codes

    M41-SCOLIOSIS

    ICD-10-CM Code For Scoliosis: Group Overview

    M42-SPINAL-OSTEOCHONDROSIS

    ICD-10-CM Code For Spinal Osteochondrosis: Group Overview

    M43-OTHER-DEFORMING-DORSOPATHIES

    ICD-10-CM Code For Other Deforming Dorsopathies: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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