1. ICD-10-CM Codes
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2. M00-M99 Diseases of the musculoskeletal system and connective tissue
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3. M45-M49 Spondylopathies
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4. M45- Ankylosing spondylitis
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2019 ICD-10-CM Diagnosis Code M45

Ankylosing spondylitis

2016 2017 2018 2019 Non-Billable/Non-Specific Code

• M45 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
• The 2019 edition of ICD-10-CM M45 became effective on October 1, 2018.
• This is the American ICD-10-CM version of M45 - other international versions of ICD-10 M45 may differ.

• A chronic inflammatory condition affecting the axial joints, such as the sacroiliac joint and other intervertebral or costovertebral joints. It occurs predominantly in young males and is characterized by pain and stiffness of joints (ankylosis) with inflammation at tendon insertions.
• An autoimmune chronic inflammatory disorder characterized by inflammation in the vertebral joints of the spine and sacroiliac joints. It predominantly affects young males. Patients present with stiffness and pain in the spine.
• Ankylosing spondylitis is a type of arthritis of the spine. It causes swelling between your vertebrae, which are the disks that make up your spine, and in the joints between your spine and pelvis. Ankylosing spondylitis is an immune disease. The disease is more common and more severe in men. It often runs in families. Early symptoms include back pain and stiffness. These problems often start in late adolescence or early adulthood. Over time, ankylosing spondylitis can fuse your vertebrae together, limiting movement. Symptoms can worsen or improve or stop altogether. The disease has no cure, but medicines can relieve the pain, swelling and other symptoms. Exercise can also help. nih: national institute of arthritis and musculoskeletal and skin disease
• Chronic inflammation of the spine and the low back bone joint

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change

• Code First: J99
  ICD-10-CM Diagnosis Code J99

  Respiratory disorders in diseases classified elsewhere

  2016 2017 2018 2019 Billable/Specific Code Manifestation Code

  Code First

  • underlying disease, such as:
  • amyloidosis (E85.-)
  • ankylosing spondylitis (M45)
  • congenital syphilis (A50.5)
  • cryoglobulinemia (D89.1)
  • early congenital syphilis (A50.0)
  • plasminogen deficiency (E88.02)
  • schistosomiasis (B65.0-B65.9)

  Type 1 Excludes

  • respiratory disorders in:
  • amebiasis (A06.5)
  • blastomycosis (B40.0-B40.2)
  • candidiasis (B37.1)
  • coccidioidomycosis (B38.0-B38.2)
  • cystic fibrosis with pulmonary manifestations (E84.0)
  • dermatomyositis (M33.01, M33.11)
  • histoplasmosis (B39.0-B39.2)
  • late syphilis (A52.72, A52.73)
  • polymyositis (M33.21)
  • sicca syndrome (M35.02)
  • systemic lupus erythematosus (M32.13)
  • systemic sclerosis (M34.81)
  • Wegener's granulomatosis (M31.30-M31.31)
• Type 1 Excludes: M05
  , G55
  ICD-10-CM Diagnosis Code M05

  Rheumatoid arthritis with rheumatoid factor

  2016 2017 2018 2019 Non-Billable/Non-Specific Code

  Type 1 Excludes

  • rheumatic fever (I00)
  • juvenile rheumatoid arthritis (M08.-)
  • rheumatoid arthritis of spine (M45.-)
  ICD-10-CM Diagnosis Code G55

  Nerve root and plexus compressions in diseases classified elsewhere

  2016 2017 2018 2019 Billable/Specific Code Manifestation Code

  Code First

  • underlying disease, such as:
  • neoplasm (C00-D49)

  Type 1 Excludes

  • nerve root compression (due to) (in) ankylosing spondylitis (M45.-)
  • nerve root compression (due to) (in) dorsopathies (M53.-, M54.-)
  • nerve root compression (due to) (in) intervertebral disc disorders (M50.1.-, M51.1.-)
  • nerve root compression (due to) (in) spondylopathies (M46.-, M48.-)
  • nerve root compression (due to) (in) spondylosis (M47.0-M47.2.-)

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.