1. ICD-10-CM Codes
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2. G00-G99 Diseases of the nervous system
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3. G10-G14 Systemic atrophies primarily affecting the central nervous system
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4. G12- Spinal muscular atrophy and related syndromes
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2020 ICD-10-CM Diagnosis Code G12.9

Spinal muscular atrophy, unspecified

2016 2017 2018 2019 2020 Billable/Specific Code

• G12.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2020 edition of ICD-10-CM G12.9 became effective on October 1, 2019.
• This is the American ICD-10-CM version of G12.9 - other international versions of ICD-10 G12.9 may differ.

• Spinal muscular atrophy

• A group of disorders marked by progressive degeneration of motor neurons in the spinal cord resulting in weakness and muscular atrophy, usually without evidence of injury to the corticospinal tracts. Diseases in this category include werdnig-hoffmann disease and later onset spinal muscular atrophies of childhood, most of which are hereditary. (Adams et al., Principles of Neurology, 6th ed, p1089)
• An inherited disorder characterized by degeneration of the spinal cord and the cerebellum. Symptoms may appear at any age and include progressive loss of coordination of gait, hands, speech, and eye movements.
• Spinal muscular atrophy (sma) is a genetic disease that attacks nerve cells, called motor neurons, in your spinal cord. These neurons communicate with your voluntary muscles - the ones you can control, like in your arms and legs. As you lose the neurons, your muscles weaken. This can affect walking, crawling, breathing, swallowing and head and neck control.sma runs in families. Parents usually have no symptoms, but still carry the gene. Genetic counseling is important if the disease runs in your family.there are many types of sma, and some of them are fatal. Life expectancy depends on the type you have and how it affects your breathing. There is no cure. Medicines and physical therapy help treat symptoms.

• 056 Degenerative nervous system disorders with mcc
• 057 Degenerative nervous system disorders without mcc

Convert G12.9 to ICD-9-CM

• 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
• 2020 (effective 10/1/2019): No change

• Atrophy, atrophic (of)
  • muscle, muscular (diffuse) (general) (idiopathic) (primary) M62.50
    ICD-10-CM Diagnosis Code M62.50

    Muscle wasting and atrophy, not elsewhere classified, unspecified site

    2016 2017 2018 2019 2020 Billable/Specific Code
    • spinal G12.9

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