2024 ICD-10-CM Diagnosis Code B04

Monkeypox

ICD-10-CM Code:
B04
ICD-10 Code for:
Monkeypox
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Certain infectious and parasitic diseases
    (A00–B99)
    • Viral infections characterized by skin and mucous membrane lesions
      (B00-B09)
      • Monkeypox
        (B04)

B04 is a billable diagnosis code used to specify a medical diagnosis of monkeypox. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Corneal disorder caused by monkeypox virus
  • Encephalopathy caused by monkeypox virus
  • Mpox
  • Sepsis caused by monkeypox virus

Clinical Classification

Clinical Information

  • Monkeypox

    a viral disease infecting primates and rodents. its clinical presentation in humans is similar to smallpox including fever; headache; cough; and a painful rash. it is caused by monkeypox virus and is usually transmitted to humans through bites or via contact with an animal's blood. interhuman transmission is relatively low (significantly less than smallpox).
  • Monkeypox virus

    a species of orthopoxvirus causing an epidemic disease among captive primates.
  • Smallpox Vaccine

    a vaccinia virus vaccine used for immunization against smallpox. it is now recommended only for laboratory workers exposed to smallpox virus. certain countries continue to vaccinate those in the military service. rare complications most often associated with older generation smallpox vaccines include vaccinia, secondary bacterial infections, and encephalomyelitis. because monkeypox virus and smallpox virus are both orthopoxvirus and are closely related smallpox vaccines provide effective cross-protection against monkeypox (https://www.cdc.gov/poxvirus/monkeypox/clinicians/smallpox-vaccine.html).
  • Orthopoxvirus

    a genus of the family poxviridae, subfamily chordopoxvirinae, comprising many species infecting mammals. viruses of this genus cause generalized infections and a rash in some hosts. the type species is vaccinia virus.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert B04 to ICD-9-CM

  • ICD-9-CM Code: 059.01 - Monkeypox

Patient Education


Mpox

What is mpox?

Mpox, which used to be called monkeypox, is a rare disease caused by infection with the mpox virus. The mpox virus is in the same family of viruses as the smallpox virus. But mpox is less contagious than smallpox. And its disease causes milder symptoms and is usually not fatal.

In the past, most of the people who got mpox lived in certain parts of central and western Africa, had traveled there, or had been exposed to infected animals imported from there. During the recent outbreak, the disease has been found in people who live in other countries, including the United States.

How does mpox spread?

Mpox spreads in different ways:

  • Through close, personal, often skin-to-skin contact with someone who has the virus:
    • Through direct contact with their rash, scabs, or body fluids.
    • By breathing in the virus during prolonged, face-to-face contact.
    • During intimate physical contact such as kissing, cuddling, hugging, massage or sex.
  • During pregnancy, from the pregnant person to the baby.
  • From touching items (such as clothes, bedding, or towels) that were used by someone who has the virus. The risk of getting mpox this way is low.
  • From infected animals:
    • By being scratched or bitten by the animal.
    • By preparing or eating meat or using products from the animal.

Someone who has mpox can spread it from the time their symptoms start until their rash has fully healed, all scabs have fallen off, and a fresh layer of skin has formed. This usually takes 2-4 weeks.

Researchers have found that some people can spread mpox to others from 1 to 4 days before their symptoms appear. It is not known how often this happens.

What are the symptoms of mpox?

The symptoms of mpox usually start within 3 weeks from the time you were exposed to the virus. The symptoms may include:

  • A rash with sores that can look like pimples or blisters. It could be on the face, inside the mouth, and on other parts of the body, like the hands, feet, chest, genitals, or anus. It goes through different stages, including scabs, before healing. This can take 2-4 weeks.
  • Fever.
  • Chills.
  • Swollen lymph nodes ("swollen glands").
  • Exhaustion.
  • Headache.
  • Muscle aches and backache.
  • Respiratory symptoms, such as a sore throat, nasal congestion, or cough.

You may have all or only a few symptoms:

  • You may get a rash first, followed by other symptoms
  • You may have flu-like symptoms and then develop a rash 1-4 days later
  • You may only get a rash

How is mpox diagnosed?

To find out if you have mpox, your provider:

  • Will ask about your symptoms and health history.
  • Will look at your rash.
  • Will take a sample of tissue from one of the sores so it can be tested for mpox virus.
  • May do blood tests to check for mpox virus or for antibodies to the virus. Antibodies are proteins that your immune system makes to fight foreign substances, such as viruses and bacteria.

What are the treatments for mpox?

There are no treatments specifically for mpox, but many people get better on their own.

Since mpox and smallpox are similar, antiviral medicines that protect against smallpox may also help treat mpox. Antiviral medicines may be recommended for people who are more likely to get severely ill, such as patients who have weakened immune systems.

Can mpox be prevented?

There are steps you can take to help prevent mpox:

  • Avoid close, skin-to-skin contact with the mpox rash. So, while a person is sick with mpox:
    • Do not touch their rash or scabs.
    • Do not kiss, hug, cuddle, or have sex with them.
    • Do not share eating utensils or cups with them.
  • Do not touch the bedding, towels, or clothing of a person who has mpox.
  • Wash your hands often with soap and water or use an alcohol-based hand sanitizer, especially after contact with sick people.
  • In Central and West Africa, avoid contact with animals that can spread mpox virus, such as rodents and primates. Also, avoid sick or dead animals, as well as any bedding or other materials they have touched.

If you are sick with mpox it is recommended that you stay home while you are sick, if possible. If you have an active rash or other symptoms, it would be best to stay in a separate room from your family members and pets if you can.

The U.S. government has two vaccines in the U.S. to protect against mpox. One was approved for smallpox and mpox (JYNNEOS), and the other was approved for smallpox (ACAM2000):

  • JYNNEOS is the preferred vaccine to protect against mpox. It is a two-dose vaccine.
  • ACAM2000 may be an alternative to JYNNEOS. ACAM2000 is a single-dose vaccine. But it has the potential for more side effects and adverse events than JYNNEOS. And it is not recommended for people who are pregnant, are under 12 months old, have severely weakened immune systems, or have certain medical conditions.

The U. S. Centers for Disease Control and Prevention (CDC) recommends vaccination for people who have been exposed to mpox or who are more likely to get mpox.

Centers for Disease Control and Prevention


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.