G00-G99 - Diseases of the nervous system

ICD-10-CM Chapter 6 · 11 sections · 68 categories · 932 codes · FY2027

Includes diseases of the central and peripheral nervous system such as meningitis, Alzheimer's, Parkinson's, and epilepsy.

Chapter Notes

Excludes 2 — Not Included HereFrom Chapter G00-G99

Not part of this code; report both codes when the patient has both conditions.

  • 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)

Categories in this Chapter (68)

G00-G09Inflammatory diseases of the central nervous system (G00-G09)(10)

G10-G14Systemic atrophies primarily affecting the central nervous system (G10-G14)(5)

G20-G26Extrapyramidal and movement disorders (G20-G26)(6)

G30-G32Other degenerative diseases of the nervous system (G30-G32)(3)

G35-G37Demyelinating diseases of the central nervous system (G35-G37)(3)

G40-G47Episodic and paroxysmal disorders (G40-G47)(6)

G50-G59Nerve, nerve root and plexus disorders (G50-G59)(10)

G60-G65Polyneuropathies and other disorders of the peripheral nervous system (G60-G65)(6)

G70-G73Diseases of myoneural junction and muscle (G70-G73)(4)

G80-G83Cerebral palsy and other paralytic syndromes (G80-G83)(4)

G89-G99Other disorders of the nervous system (G89-G99)(11)