2021 ICD-10-CM Diagnosis Code I68.2

Cerebral arteritis in other diseases classified elsewhere

    2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
  • I68.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM I68.2 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of I68.2 - other international versions of ICD-10 I68.2 may differ.
ICD-10-CM Coding Rules
  • I68.2 describes the manifestation of an underlying disease, not the disease itself.
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • underlying disease
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as I68.2. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • cerebral arteritis (in):
  • listerosis (
    ICD-10-CM Diagnosis Code A32.89

    Other forms of listeriosis

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Listerial cerebral arteritis
    A32.89
    )
  • systemic lupus erythematosus (
    ICD-10-CM Diagnosis Code M32.19

    Other organ or system involvement in systemic lupus erythematosus

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    M32.19
    )
  • syphilis (
    ICD-10-CM Diagnosis Code A52.04

    Syphilitic cerebral arteritis

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    A52.04
    )
  • tuberculosis (
    ICD-10-CM Diagnosis Code A18.89

    Tuberculosis of other sites

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Tuberculosis of muscle
    • Tuberculous cerebral arteritis
    A18.89
    )
The following code(s) above I68.2 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to I68.2:
  • I00-I99
    2021 ICD-10-CM Range I00-I99

    Diseases of the circulatory system

    Type 2 Excludes
    • 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)
    • systemic connective tissue disorders (M30-M36)
    • transient cerebral ischemic attacks and related syndromes (G45.-)
    Diseases of the circulatory system
  • I60-I69
    2021 ICD-10-CM Range I60-I69

    Cerebrovascular diseases

    Type 1 Excludes
    • traumatic intracranial hemorrhage (S06.-)
    Use Additional
    • code to identify presence of:
    • alcohol abuse and dependence (F10.-)
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • hypertension (I10-I16)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    Cerebrovascular diseases
Approximate Synonyms
  • Secondary cerebral arteritis
ICD-10-CM I68.2 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 102 Headaches with mcc
  • 103 Headaches without mcc

Convert I68.2 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to I68.2:
  • Arteritis I77.6
    ICD-10-CM Diagnosis Code I77.6

    Arteritis, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Aortitis NOS
    • Endarteritis NOS
    Type 1 Excludes
    • cerebral I67.7
      ICD-10-CM Diagnosis Code I67.7

      Cerebral arteritis, not elsewhere classified

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Applicable To
      • Granulomatous angiitis of the nervous system
      Type 1 Excludes
      • allergic granulomatous angiitis (M30.1)
      • in
        • diseases classified elsewhere I68.2

ICD-10-CM Codes Adjacent To I68.2
I67.84 Cerebral vasospasm and vasoconstriction
I67.841 Reversible cerebrovascular vasoconstriction syndrome
I67.848 Other cerebrovascular vasospasm and vasoconstriction
I67.85 Hereditary cerebrovascular diseases
I67.850 Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy
I67.858 Other hereditary cerebrovascular disease
I67.89 Other cerebrovascular disease
I67.9 Cerebrovascular disease, unspecified
I68 Cerebrovascular disorders in diseases classified elsewhere
I68.0 Cerebral amyloid angiopathy
I68.2 Cerebral arteritis in other diseases classified elsewhere
I68.8 Other cerebrovascular disorders in diseases classified elsewhere
I69 Sequelae of cerebrovascular disease
I69.0 Sequelae of nontraumatic subarachnoid hemorrhage
I69.00 Unspecified sequelae of nontraumatic subarachnoid hemorrhage
I69.01 Cognitive deficits following nontraumatic subarachnoid hemorrhage
I69.010 Attention and concentration deficit following nontraumatic subarachnoid hemorrhage
I69.011 Memory deficit following nontraumatic subarachnoid hemorrhage
I69.012 Visuospatial deficit and spatial neglect following nontraumatic subarachnoid hemorrhage
I69.013 Psychomotor deficit following nontraumatic subarachnoid hemorrhage
I69.014 Frontal lobe and executive function deficit following nontraumatic subarachnoid hemorrhage

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.