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A81.9

Billable

Atypical virus infection of central nervous system, unsp

Atypical virus infection of central nervous system, unspecified

Status

Billable / Specific

Block

A80-A89

Parent Code

A81

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Prion diseases of the central nervous system NOS

Includes

Conditions included under this code

  • diseases generally recognized as communicable or transmissible
  • diseases of the central nervous system caused by prions

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

  • certain localized infections - see body system-related chapters
  • postpolio syndrome (G14)
  • sequelae of poliomyelitis (B91)
  • sequelae of viral encephalitis (B94.1)

Excludes 2

Conditions not included here, but the patient may have both

  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Additional codes that should follow this code

Also Known As / Clinical Terms

SNOMED CT

UMLS

Frequently Asked Questions

What is the ICD-10 code for atypical virus infection of central nervous system, unsp?

The ICD-10-CM code for atypical virus infection of central nervous system, unsp is A81.9. The full clinical description is "Atypical virus infection of central nervous system, unspecified". A81.9 is a billable/specific code that can be used on insurance claims and medical billing.

What does ICD-10 code A81.9 mean?

ICD-10-CM code A81.9 represents "Atypical virus infection of central nervous system, unspecified". It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a billable/specific code that can be used on a claim.

Is A81.9 a billable code?

Yes, A81.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.

What chapter is A81.9 in?

A81.9 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).

What codes cannot be used with A81.9?

A81.9 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters; postpolio syndrome (G14); sequelae of poliomyelitis (B91); and 1 more.

Are additional codes required with A81.9?

Yes, when using A81.9 you should also code: code to identify resistance to antimicrobial drugs (Z16.-); code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).

What SNOMED CT codes does A81.9 map to?

A81.9 maps to 11 SNOMED CT concepts: 721255002, 1259081008, 1259640001, 762350007, 724811002, and 6 more. SNOMED CT is a clinical terminology used in electronic health records.

What are the UMLS CUIs for A81.9?

A81.9 is linked to 2 UMLS Concept Unique Identifiers: C0851226, C0162534. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.