1. ICD-10-CM Codes
›
2. G00-G99 Diseases of the nervous system
›
3. G10-G14 Systemic atrophies primarily affecting the central nervous system
›
4. G12- Spinal muscular atrophy and related syndromes
›
5. 2021 ICD-10-CM Diagnosis Code G12.2

2021 ICD-10-CM Diagnosis Code G12.2

Motor neuron disease

2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code

• G12.2 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
• The 2021 edition of ICD-10-CM G12.2 became effective on October 1, 2020.
• This is the American ICD-10-CM version of G12.2 - other international versions of ICD-10 G12.2 may differ.

• Diseases characterized by a selective degeneration of the motor neurons of the spinal cord, brainstem, or motor cortex. Clinical subtypes are distinguished by the major site of degeneration. In amyotrophic lateral sclerosis there is involvement of upper, lower, and brainstem motor neurons. In progressive muscular atrophy and related syndromes (see muscular atrophy, spinal) the motor neurons in the spinal cord are primarily affected. With progressive bulbar palsy (bulbar palsy, progressive), the initial degeneration occurs in the brainstem. In primary lateral sclerosis, the cortical neurons are affected in isolation. (Adams et al., Principles of Neurology, 6th ed, p1089)
• Disorders of motor neurons which result in atrophy, fasciculation and fibrillations, spasticity, decreased muscle tone, loss of or overactive tendon reflexes, and abnormal extensor reflexes.

• 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
• 2021 (effective 10/1/2020): No change

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