Inflammatory Diseases Of The Central Nervous System ICD 9 Codes (320-326)

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

INFLAMMATORY DISEASES OF THE CENTRAL NERVOUS SYSTEM (ICD 9 CODES: 320-326)

320       Bacterial meningitis

Includes:     arachnoiditis bacterial

leptomeningitis bacterial

meningitis bacterial

meningoencephalitis bacterial

meningomyelitis bacterial

pachymeningitis bacterial

320.0    Hemophilus meningitis

Meningitis due to Hemophilus influenzae [H. influenzae]

320.1    Pneumococcal meningitis

320.2    Streptococcal meningitis

320.3    Staphylococcal meningitis

320.7    Meningitis in other bacterial diseases classified elsewhere

Code first underlying disease as:

actinomycosis (039.8)

listeriosis (027.0)

typhoid fever (002.0)

whooping cough (033.0-033.9)

Excludes: meningitis (in):

epidemic (036.0)

gonococcal (098.82)

meningococcal (036.0)

salmonellosis (003.21)

syphilis:

NOS (094.2)

congenital (090.42)

meningovascular (094.2)

secondary (091.81)

tuberculosis (013.0)

320.8    Meningitis due to other specified bacteria

320.81  Anaerobic meningitis

Gram-negative anaerobes

Bacteroides (fragilis)

320.82  Meningitis due to gram-negative bacteria, not elsewhere classified

Aerobacter aerogenes

Escherichia coli [E. coli]

Friedlander bacillus

Klebsiella pneumoniae

Proteus morganii

Pseudomonas

Excludes: gram-negative anaerobes (320.81)

320.89  Meningitis due to other specified bacteria

Bacillus pyocyaneus

320.9    Meningitis due to unspecified bacterium

Meningitis:

bacterial NOS

purulent NOS

pyogenic NOS

suppurative NOS

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

321.0    Cryptococcal meningitis

Code first underlying disease (117.5)

321.1    Meningitis in other fungal diseases

Code first underlying disease (110.0-118)

Excludes: meningitis in:

candidiasis (112.83)

coccidioidomycosis (114.2)

histoplasmosis (115.01, 115.11, 115.91)

321.2    Meningitis due to viruses not elsewhere classified

Code first underlying disease, as:

meningitis due to arbovirus (060.0-066.9)

Excludes: meningitis (due to):

abacterial (047.0-047.9)

adenovirus (049.1)

aseptic NOS (047.9)

Coxsackie (virus) (047.0)

ECHO virus (047.1)

enterovirus (047.0-047.9)

herpes simplex virus (054.72)

herpes zoster virus (053.0)

lymphocytic choriomeningitis virus (049.0)

mumps (072.1)

viral NOS (047.9)

meningo-eruptive syndrome (047.1)

321.3    Meningitis due to trypanosomiasis

Code first underlying disease (086.0-086.9)

321.4    Meningitis in sarcoidosis

Code first underlying disease (135)

321.8    Meningitis due to other nonbacterial organisms classified elsewhere

Code first underlying disease

Excludes: leptospiral meningitis (100.81)

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

322.0    Nonpyogenic meningitis

Meningitis with clear cerebrospinal fluid

322.1    Eosinophilic meningitis

322.2    Chronic meningitis

322.9    Meningitis, unspecified

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)

323.0    Encephalitis, myelitis, and encephalomyelitis in viral diseases classified elsewhere

Code first underlying disease, as:

cat-scratch disease (078.3)

human immunodeficiency virus [HIV] disease (042)

infectious mononucleosis (075)

ornithosis (073.7)

323.01  Encephalitis and encephalomyelitis in viral diseases classified elsewhere

Excludes: encephalitis (in):

arthropod-borne viral (062.0-064)

herpes simplex (054.3)

mumps (072.2)

other viral diseases of central nervous system (049.8-049.9)

poliomyelitis (045.0-045.9)

rubella (056.01)

slow virus infections of central nervous system (046.0-046.9)

viral NOS (049.9)

West Nile (066.41)

323.02  Myelitis in viral diseases classified elsewhere

Excludes: myelitis (in):

herpes simplex (054.74)

herpes zoster (053.14)

other viral diseases of central nervous system (049.8-049.9)

poliomyelitis (045.0-045.9)

rubella (056.01)

323.1    Encephalitis, myelitis, and encephalomyelitis in rickettsial diseases classified elsewhere

Code first underlying disease (080-083.9)

323.2    Encephalitis, myelitis, and encephalomyelitis in protozoal diseases classified elsewhere

Code first underlying disease, as:

malaria (084.0-084.9)

trypanosomiasis (086.0-086.9)

323.4    Other encephalitis, myelitis, and encephalomyelitis due to other infections classified elsewhere

Code first underlying disease

323.41  Other encephalitis and encephalomyelitis due to other infections classified elsewhere

Excludes: encephalitis (in):

meningococcal (036.1)

syphilis:

NOS (094.81)

congenital (090.41)

toxoplasmosis (130.0)

tuberculosis (013.6)

meningoencephalitis due to free-living ameba [Naegleria] (136.29)

323.42  Other myelitis due to other infections classified elsewhere

Excludes: myelitis (in):

syphilis (094.89)

tuberculosis (013.6)

323.5    Encephalitis, myelitis, and encephalomyelitis following immunization procedures

Use additional E code to identify vaccine

323.51  Encephalitis and encephalomyelitis following immunization procedures

Encephalitis postimmunization or postvaccinal

Encephalomyelitis postimmunization or postvaccinal

323.52  Myelitis following immunization procedures

Myelitis postimmunization or postvaccinal

323.6    Postinfectious encephalitis, myelitis, and encephalomyelitis

Code first underlying disease

323.61  Infectious acute disseminated encephalomyelitis (ADEM)

Acute necrotizing hemorrhagic encephalopathy

Excludes:noninfectious acute disseminated encephalomyelitis (323.81)

323.62  Other postinfectious encephalitis and encephalomyelitis

Excludes: encephalitis:

postchickenpox (052.0)

postmeasles (055.0)

323.63  Postinfectious myelitis

323.7    Toxic encephalitis, myelitis, and encephalomyelitis

Code first underlying cause, as:

carbon tetrachloride (982.1)

hydroxyquinoline derivatives (961.3)

lead (984.0-984.9)

mercury (985.0)

thallium (985.8)

323.71  Toxic encephalitis and encephalomyelitis

323.72  Toxic myelitis

323.8    Other causes of encephalitis, myelitis, and encephalomyelitis

323.81  Other causes of encephalitis and encephalomyelitis

Noninfectious acute disseminated encephalomyelitis (ADEM)

323.82  Other causes of myelitis

Transverse myelitis NOS

323.9    Unspecified cause of encephalitis, myelitis, and encephalomyelitis

324       Intracranial and intraspinal abscess

324.0    Intracranial abscess

Abscess (embolic):

cerebellar

cerebral

Abscess (embolic) of brain [any part]:

epidural

extradural

otogenic

subdural

Excludes: tuberculous (013.3)

324.1    Intraspinal abscess

Abscess (embolic) of spinal cord [any part]:

epidural

extradural

subdural

Excludes: tuberculous (013.5)

324.9    Of unspecified site

Extradural or subdural abscess NOS

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)