B00.4 - Herpesviral encephalitis
| ICD-10: | B00.4 |
| Short Description: | Herpesviral encephalitis |
| Long Description: | Herpesviral encephalitis |
| Status: | Valid for Submission |
| Version: | ICD-10-CM 2023 |
| Code Classification: |
B00.4 is a billable ICD-10 code used to specify a medical diagnosis of herpesviral encephalitis. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Acute necrotizing encephalitis
- Acute viral encephalitis
- Dementia associated with viral encephalitis
- Dementia due to herpes encephalitis
- Dementia due to infectious disease
- Encephalitis due to Herpesviridae
- Encephalitis due to human herpes simplex virus
- Herpes simiae encephalitis
- Herpes simplex meningitis
- Herpes simplex type 1 encephalitis
- Herpes simplex type 1 infection
- Herpes simplex type 2 encephalitis
- Herpes simplex type 2 infection
- Herpetic acute necrotizing encephalitis
- Herpetic meningoencephalitis
- Meningoencephalitis caused by virus
- Simian B disease
- Simian B encephalomyelitis
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to this diagnosis code:
Inclusion Terms
Inclusion TermsThese terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Herpesviral meningoencephalitis
- Simian B disease
Type 1 Excludes
Type 1 ExcludesA type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and Injuries References
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for this diagnosis code are found in the injuries and diseases index:
- - Disease, diseased - See Also: Syndrome;
- - simian B - B00.4
- - Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) - G04.90
- - in (due to)
- - herpes (simplex) virus - B00.4
- - in (due to)
- - Herpes, herpesvirus, herpetic - B00.9
- - encephalitis - B00.4
- - Meningoencephalitis - See Also: Encephalitis; - G04.90
- - in (due to)
- - herpes - B00.4
- - in (due to)
Convert to ICD-9 Code
| Source ICD-10 Code | Target ICD-9 Code | |
|---|---|---|
| B00.4 | 054.3 - Herpetic encephalitis | |
| Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code. | ||
Patient Education
Encephalitis
Encephalitis is an inflammation of the brain. Usually the cause is a viral infection, but bacteria can also cause it. It can be mild or severe. Most cases are mild. You may have flu-like symptoms. With a mild case, you may just need rest, plenty of fluids, and a pain reliever.
Severe cases need immediate treatment. Symptoms of severe cases include:
- Severe headache
- Sudden fever
- Drowsiness
- Vomiting
- Confusion
- Seizures
In babies, additional symptoms may include constant crying, poor feeding, body stiffness, and bulging in the soft spots of the skull.
Severe cases may require a stay in the hospital. Treatments include oral and intravenous (IV) medicines to reduce inflammation and treat infection. Patients with breathing difficulties may need artificial respiration. Some people may need physical, speech, and occupational therapy once the illness is under control.
NIH: National Institute of Neurological Disorders and Stroke
[Learn More in MedlinePlus]
Herpes Simplex
Herpes is an infection that is caused by a herpes simplex virus (HSV). Oral herpes causes cold sores around the mouth or face. Genital herpes affects the genitals, buttocks or anal area. Genital herpes is a sexually transmitted disease (STD). It affects the genitals, buttocks or anal area. Other herpes infections can affect the eyes, skin, or other parts of the body. The virus can be dangerous in newborn babies or in people with weak immune systems.
There are two types of HSV:
- HSV type 1 most commonly causes cold sores. It can also cause genital herpes.
- HSV type 2 is the usual cause of genital herpes, but it also can infect the mouth.
HSV spreads through direct contact. Some people have no symptoms. Others get sores near the area where the virus has entered the body. They turn into blisters, become itchy and painful, and then heal.
Most people have outbreaks several times a year. Over time, you get them less often. Medicines to help your body fight the virus can help lessen symptoms and decrease outbreaks.
[Learn More in MedlinePlus]
Code History
- FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
- FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
- FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)
