List of ICD-9 codes 320–389: diseases of the nervous system and sense organs

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ICD-9 chapters
Chapter Block Title
I 001–139 Infectious and Parasitic Diseases
II 140–239 Neoplasms
III 240–279 Endocrine, Nutritional and Metabolic Diseases, and Immunity Disorders
IV 280–289 Diseases of the Blood and Blood-forming Organs
V 290–319 Mental Disorders
VI 320–389 Diseases of the Nervous System and Sense Organs
VII 390–459 Diseases of the Circulatory System
VIII 460–519 Diseases of the Respiratory System
IX 520–579 Diseases of the Digestive System
X 580–629 Diseases of the Genitourinary System
XI 630–679 Complications of Pregnancy, Childbirth, and the Puerperium
XII 680–709 Diseases of the Skin and Subcutaneous Tissue
XIII 710–739 Diseases of the Musculoskeletal System and Connective Tissue
XIV 740–759 Congenital Anomalies
XV 760–779 Certain Conditions originating in the Perinatal Period
XVI 780–799 Symptoms, Signs and Ill-defined Conditions
XVII 800–999 Injury and Poisoning
E800–E999 Supplementary Classification of External Causes of Injury and Poisoning
V01–V82 Supplementary Classification of Factors influencing Health Status and Contact with Health Services
M8000–M9970 Morphology of Neoplasms

This is a shortened version of the sixth chapter of the ICD-9: Diseases of the Nervous System and Sense Organs. It covers ICD codes 320 to 389. The full chapter can be found on pages 215 to 258 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1. Both volumes can be downloaded for free from the website of the World Health Organisation.

In the ICD-9 system, a disease may have a cause listed in one chapter, and its manifestations listed in another. For example, Tuberculous meningitis is caused by a bacterial infection, and is therefore listed in Chapter 1, Infectious and parasitic diseases. However, as it results in a disorder of the nervous system, it is also listed in this chapter. An asterisk (*) means that a disease has an underlying cause which can be found elsewhere in the ICD. A code referring to such an underlying cause may be right next to the name, in parenthesis, and marked with a dagger symbol of the Times New Roman font ().

Inflammatory diseases of the central nervous system (320–326)[edit]

  • 326 Late effects of intracranial abscess or pyogenic infection

Hereditary and Degenerative diseases of the central nervous system (330–337)[edit]

Other disorders of the central nervous system (340–349)[edit]

  • 349 Other and unspecified disorders of the nervous system
    • 349.0 Reaction to spinal or lumbar puncture
    • 349.1 Nervous system complications from surgically implanted device
    • 349.2 Disorders of meninges, not elsewhere classified
    • 349.8 Other
    • 349.9 Unspecified

Disorders of the peripheral nervous system (350–359)[edit]

Disorders of the eye and adnexa (360–379)[edit]

  • 364 Disorders of iris and ciliary body
    • 364.0 Acute and subacute iridocyclitis
    • 364.1 Chronic iridocyclitis
    • 364.2 Certain types of iridocyclitis
    • 364.3 Unspecified iridocyclitis
    • 364.4 Vascular disorders of iris and ciliary body
    • 364.5 Degenerations of iris and ciliary body
    • 364.6 Cysts of iris, ciliary body and anterior chamber
    • 364.7 Adhesions and disruptions of iris and ciliary body
    • 364.8 Other disorders of iris and ciliary body
    • 364.9 Unspecified
  • 365 Glaucoma
    • 365.0 Borderline glaucoma
    • 365.1 Open-angle glaucoma
    • 365.2 Primary angle-closure glaucoma
    • 365.3 Corticosteroid-induced glaucoma
    • 365.4 Glaucoma associated with congenital anomalies, with dystrophies and with systemic syndromes
    • 365.5 Glaucoma associated with disorders of the lens
    • 365.6 Glaucoma associated with other ocular disorders
    • 365.8 Other glaucoma
    • 365.9 Unspecified
  • 366 Cataract
    • 366.0 Infantile, juvenile and presenile cataract
    • 366.1 Senile cataract
    • 366.2 Traumatic cataract
    • 366.3 Cataract secondary to ocular disorders
    • 366.4 Cataract associated with other disorders
    • 366.5 After-cataract
    • 366.8 Other cataract
    • 366.9 Unspecified

Diseases of the ear and mastoid process (380–389)[edit]

  • 382 Suppurative and unspecified otitis media
    • 382.0 Acute suppurative otitis media
    • 382.1 Chronic tubotympanic suppurative otitis media
    • 382.2 Chronic atticoantral suppurative otitis media
    • 382.3 Unspecified chronic suppurative otitis media
    • 382.4 Unspecified suppurative otitis media
    • 382.9 Unspecified otitis media