Degenerative disease of nervous system, unspecified
G31.9 is from the 2021 edition of ICD-10-CM, which is effective on October 1, 2020. G31.9 is the American ICD-10-CM version. Other international versions of the ICD-10 code of G31.9 may vary.
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[toggle title=’Additional Details’]This code comes under Chapter 6
Chapter 6 contains the following blocks:
- G00-G09 Inflammatory diseases of the central nervous system
- G10-G14 Systemic atrophies primarily affecting the central nervous system
- G20-G26 Extrapyramidal and movement disorders
- G30-G32 Other degenerative diseases of the nervous system
- G35-G37 Demyelinating diseases of the central nervous system
- G40-G47 Episodic and paroxysmal disorders
- G50-G59 Nerve, nerve root and plexus disorders
- G60-G65 Polyneuropathies and other disorders of the peripheral nervous system
- G70-G73 Diseases of myoneural junction and muscle
- G80-G83 Cerebral palsy and other paralytic syndromes
- G89-G99 Other disorders of the nervous system
Below is some additional information from Chapter 6
Diseases of the nervous system (G00-G99)
Excludes2: certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94).[/toggle]