ICD-9-CM

6. DISEASES OF THE NERVOUS SYSTEM AND SENSE ORGANS (320-389)

INFLAMMATORY DISEASES OF THE CENTRAL NERVOUS SYSTEM (320-326)
320: Bacterial meningitis Includes: arachnoiditis bacterial leptomeningitis bacterial meningitis bacterial meningoencephalitis bacterial meningomyelitis bacterial pachymeningitis bacterial
321: Meningitis due to other organisms Includes: arachnoiditis due to organisms other than bacteria leptomeningitis due to organisms other than bacteria meningitis due to organisms other than bacteria pachymeningitis due to organisms other than bacteria
322: Meningitis of unspecified cause Includes: arachnoiditis with no organism specified as cause leptomeningitis with no organism specified as cause meningitis with no organism specified as cause pachymeningitis with no organism specified as cause
323: Encephalitis, myelitis, and encephalomyelitis Includes: acute disseminated encephalomyelitis meningoencephalitis, except bacterial meningomyelitis, except bacterial myelitis: ascending transverse Excludes: acute transverse myelitis NOS (341.20) acute transverse myelitis in conditions classified elsewhere (341.21) bacterial: meningoencephalitis (320.0-320.9) meningomyelitis (320.0-320.9) idiopathic transverse myelitis (341.22)
324: Intracranial and intraspinal abscess
325: Phlebitis and thrombophlebitis of intracranial venous sinuses Embolism of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus Endophlebitis of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus Phlebitis, septic or suppurative of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus Thrombophlebitis of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus Thrombosis of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus Excludes: that specified as: complicating pregnancy, childbirth, or the puerperium (671.5) of nonpyogenic origin (437.6)
326: Late effects of intracranial abscess or pyogenic infection Note: This category is to be used to indicate conditions whose primary classification is to 320-325 [excluding 320.7, 321.0-321.8, 323.01-323.42, 323.61-323.72] as the cause of late effects, themselves classifiable elsewhere. The "late effects" include conditions specified as such, or as sequelae, which may occur at any time after the resolution of the causal condition. Use additional code to identify condition, as: hydrocephalus (331.4) paralysis (342.0-342.9, 344.0-344.9)

INFLAMMATORY DISEASES OF THE CENTRAL NERVOUS SYSTEM (320-326)

320: Bacterial meningitis

Includes:

arachnoiditis bacterial

leptomeningitis bacterial

meningitis bacterial

meningoencephalitis bacterial

meningomyelitis bacterial

pachymeningitis bacterial

321: Meningitis due to other organisms

Includes:

arachnoiditis due to organisms other than bacteria

leptomeningitis due to organisms other than bacteria

meningitis due to organisms other than bacteria

pachymeningitis due to organisms other than bacteria

322: Meningitis of unspecified cause

Includes:

arachnoiditis with no organism specified as cause

leptomeningitis with no organism specified as cause

meningitis with no organism specified as cause

pachymeningitis with no organism specified as cause

323: Encephalitis, myelitis, and encephalomyelitis

Includes:

acute disseminated encephalomyelitis

meningoencephalitis, except bacterial

meningomyelitis, except bacterial

myelitis:

ascending

transverse

Excludes:

acute transverse myelitis NOS (341.20)

acute transverse myelitis in conditions classified elsewhere (341.21)

bacterial:

meningoencephalitis (320.0-320.9)

meningomyelitis (320.0-320.9)

idiopathic transverse myelitis (341.22)

324: Intracranial and intraspinal abscess

325: Phlebitis and thrombophlebitis of intracranial venous sinuses

Embolism of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus

Endophlebitis of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus

Phlebitis, septic or suppurative of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus

Thrombophlebitis of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus

Thrombosis of cavernous, lateral, or other intracranial or unspecified intracranial venous sinus

Excludes:

that specified as:

complicating pregnancy, childbirth, or the puerperium (671.5)

of nonpyogenic origin (437.6)

326: Late effects of intracranial abscess or pyogenic infection

Note:

This category is to be used to indicate conditions whose primary classification is to 320-325 [excluding 320.7, 321.0-321.8, 323.01-323.42, 323.61-323.72] as the cause of late effects, themselves classifiable elsewhere. The "late effects" include conditions specified as such, or as sequelae, which may occur at any time after the resolution of the causal condition.

Use additional code to identify condition, as:

hydrocephalus (331.4)

paralysis (342.0-342.9, 344.0-344.9)

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