All ICD10 Codes
Chapter 6

G00–G99: Diseases of the Nervous System

Diseases of the Nervous System diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)
All CodesBillable Only
Internal Codes
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  • G96.9—

    Disorder of central nervous system, unspecified

  • G97—

    Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classified

  • G97.0—

    Cerebrospinal fluid leak from spinal puncture

  • G97.1—

    Other reaction to spinal and lumbar puncture

  • G97.2—

    Intracranial hypotension following ventricular shunting

  • G97.3—

    Intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a procedure

  • G97.31—

    Intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a nervous system procedure

  • G97.32—

    Intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating other procedure

  • G97.4—

    Accidental puncture and laceration of a nervous system organ or structure during a procedure

  • G97.41—

    Accidental puncture or laceration of dura during a procedure

  • G97.48—

    Accidental puncture and laceration of other nervous system organ or structure during a nervous system procedure

  • G97.49—

    Accidental puncture and laceration of other nervous system organ or structure during other procedure

  • G97.5—

    Postprocedural hemorrhage of a nervous system organ or structure following a procedure

  • G97.51—

    Postprocedural hemorrhage of a nervous system organ or structure following a nervous system procedure

  • G97.52—

    Postprocedural hemorrhage of a nervous system organ or structure following other procedure

  • G97.6—

    Postprocedural hematoma and seroma of a nervous system organ or structure following a procedure

  • G97.61—

    Postprocedural hematoma of a nervous system organ or structure following a nervous system procedure

  • G97.62—

    Postprocedural hematoma of a nervous system organ or structure following other procedure

  • G97.63—

    Postprocedural seroma of a nervous system organ or structure following a nervous system procedure

  • G97.64—

    Postprocedural seroma of a nervous system organ or structure following other procedure

  • G97.8—

    Other intraoperative and postprocedural complications and disorders of nervous system

  • G97.81—

    Other intraoperative complications of nervous system

  • G97.82—

    Other postprocedural complications and disorders of nervous system

  • G97.83—

    Intracranial hypotension following lumbar cerebrospinal fluid shunting

  • G97.84—

    Intracranial hypotension following other procedure

  • G98—

    Other disorders of nervous system not elsewhere classified

  • G98.0—

    Neurogenic arthritis, not elsewhere classified

  • G98.8—

    Other disorders of nervous system

  • G99—

    Other disorders of nervous system in diseases classified elsewhere

  • G99.0—

    Autonomic neuropathy in diseases classified elsewhere

  • G99.2—

    Myelopathy in diseases classified elsewhere

  • G99.8—

    Other specified disorders of nervous system in diseases classified elsewhere

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