ICD-10 Diagnosis Code Z20.7

Cntct w & expsr to pediculosis, acariasis & oth infestations

Diagnosis Code Z20.7

ICD-10: Z20.7
Short Description: Cntct w & expsr to pediculosis, acariasis & oth infestations
Long Description: Contact with and (suspected) exposure to pediculosis, acariasis and other infestations
This is the 2017 version of the ICD-10-CM diagnosis code Z20.7

Code Classification
  • Factors influencing health status and contact with health services
    • Persons with potential health hazards related to communicable diseases (Z20-Z29)
      • Contact w and (suspected) exposure to communicable diseases (Z20)

Information for Patients

Head Lice

Also called: Pediculosis

Head lice are parasitic wingless insects. They live on people's heads and feed on their blood. An adult louse is about the size of a sesame seed. The eggs, called nits, are even smaller - about the size of a knot in thread. Lice and nits are found on or near the scalp, most often at the neckline and behind the ears.

Lice spread by close person-to-person contact. It is possible, but not common, to get lice by sharing personal belongings such as hats or hairbrushes. Children ages 3-11 and their families get head lice most often. Personal hygiene has nothing to do with getting head lice. Head lice do not spread disease.

Symptoms are

  • Tickling feeling in the hair
  • Frequent itching
  • Sores from scratching
  • Irritability and difficulty sleeping. Head lice are most active in the dark.

Treatment is recommended for people who have an active infestation of head lice. All household members and other close contacts should be checked and treated if necessary. Some experts also recommend treating anyone who shares a bed with an infested person. It is important to treat everyone at the same time.

Centers for Disease Control and Prevention

  • Head lice
  • Treating Head Lice (Food and Drug Administration)

[Read More]


Also called: Body lice

Lice are parasitic insects that can be found on people's heads and bodies. They survive by feeding on human blood. Lice found on each area of the body are different from each other. The three types of lice that live on humans are head lice, body lice (also called clothes lice), and pubic lice ("crabs").

Symptoms of lice may include

  • Intense itching
  • Rash
  • Visible nits (lice eggs) or crawling lice

Lice spread most commonly by close person-to-person contact. Dogs, cats, and other pets do not spread human lice. Lice move by crawling. They cannot hop or fly. If you get lice, both over-the-counter and prescription medicines are available for treatment.

Centers for Disease Control and Prevention

  • Body lice
  • Pubic lice

[Read More]

Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.

Parasites range in size from tiny, one-celled organisms called protozoa to worms that can be seen with the naked eye. Some parasitic diseases occur in the United States. Contaminated water supplies can lead to Giardia infections. Cats can transmit toxoplasmosis, which is dangerous for pregnant women. Others, like malaria, are common in other parts of the world.

If you are traveling, it's important to drink only water you know is safe. Prevention is especially important. There are no vaccines for parasitic diseases. Some medicines are available to treat parasitic infections.

  • Amebiasis
  • Amebic liver abscess
  • Ascariasis
  • Creeping eruption
  • Stool ova and parasites exam
  • Taeniasis

[Read More]
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