Diagnosis Code Z20.7
Information for Medical Professionals
The following edits are applicable to this code:
Unacceptable principal diagnosis - There are selected codes that describe a circumstance which influences an individual’s health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.
Convert to ICD-9
- V01.89 - Communic dis contact NEC (Approximate Flag)
- Exposure to disease caused by ectoparasite
- Exposure to Enterobius vermicularis
- Exposure to Leptospira
- Exposure to Pediculus humanus capitus
- Exposure to Plasmodium falciparum
- Exposure to scabies
- Exposure to Toxoplasma
Information for Patients
What are body lice?
Body lice (also called clothes lice) are tiny insects which live and lay nits (lice eggs) on clothing. They are parasites, and they need to feed on human blood to survive. They usually only move to the skin to feed.
Body lice are one of the three types of lice that live on humans. The other two types are head lice and pubic lice. Each type of lice is different, and getting one type does not mean that you will get another type.
Body lice can spread diseases, such as typhus, trench fever, and relapsing fever.
What are the symptoms of body lice?
The most common symptom of body lice is intense itching. There may also be a rash, which is caused by an allergic reaction to the bites. The itching causes some people to scratch until they get sores. Sometimes these sores can become infected with bacteria or fungi.
If someone has body lice for a long time, the heavily bitten areas of their skin can become thickened and discolored. This is most common around your midsection (waist, groin, and upper thighs).
How do body lice spread?
Body lice move by crawling, because they cannot hop or fly. One way that they spread is through physical contact with a person who has body lice. They can also spread through contact with clothing, beds, bed linens, or towels that were used by a person with body lice. You cannot get lice from animals.
Who gets body lice?
Body lice is most common in people who cannot bathe and wash their clothes regularly, especially if they live in crowded conditions. In the United States, this is most often homeless people. In other countries, body lice can also affect refugees and victims of war or natural disasters.
How do you know if you have body lice?
A diagnosis of body lice usually comes from finding nits and crawling lice in the seams of clothing. Sometimes a body louse can be seen crawling or feeding on the skin. Other times it takes a magnifying lens to see the lice or nits.
What are the treatments for body lice?
The main treatment for body lice is to improve personal hygiene. That means regular showers and washing clothes, bedding, and towels at least once a week. Use hot water to wash the laundry, and dry it using the hot cycle of the dryer. Some people may also need a lice-killing medicine.
Centers for Disease Control and Prevention
- Body lice (Medical Encyclopedia)
Also called: Pediculosis
What are head lice?
Head lice are tiny insects that live on people's heads. Adult lice are about the size of sesame seeds. The eggs, called nits, are even smaller - about the size of a dandruff flake. Lice and nits are found on or near the scalp, most often at the neckline and behind the ears.
Head lice are parasites, and they need to feed on human blood to survive. They are one of the three types of lice that live on humans. The other two types are body lice and pubic lice. Each type of lice is different, and getting one type does not mean that you will get another type.
What are the symptoms of head lice?
The symptoms of head lice include
- Tickling feeling in the hair
- Frequent itching, which is caused by an allergic reaction to the bites
- Sores from scratching. Sometimes the sores can become infected with bacteria.
- Trouble sleeping, because head lice are most active in the dark
How do head lice spread?
Lice move by crawling, because they cannot hop or fly. They spread by close person-to-person contact. Rarely, they can spread through sharing personal belongings such as hats or hairbrushes. Personal hygiene and cleanliness have nothing to do with getting head lice. You also cannot get pubic lice from animals. Head lice do not spread disease.
Who gets head lice?
Children ages 3-11 and their families get head lice most often. This is because young children often have head-to-head contact while playing together.
How do you know if you have head lice?
A diagnosis of head lice usually comes from seeing a louse or nit. Because they are very small and move quickly, you may need to use a magnifying lens and a fine-toothed comb to find lice or nits.
What are the treatments for head lice?
Treatments for head lice include both over-the-counter and prescription shampoos, creams, and lotions. If you want to use an over-the-counter treatment and you aren't sure which one to use or how to use one, ask your health care provider or pharmacist. You should also check with your health care provider first if you are pregnant or nursing, or if you want to use a treatment on a young child.
Follow these steps when using a head lice treatment:
- Apply the product according to the instructions. Only apply it to the scalp and the hair attached to the scalp. You should not use it on other body hair.
- Use only one product at a time, unless your health care provider tells you to use two different kinds at once
- Pay attention to what the instructions say about how long you should leave the medicine on the hair and on how you should rinse it out
- After rinsing, use a fine-toothed comb or special "nit comb" to remove dead lice and nits
- After each treatment, check your hair for lice and nits. You should comb your hair to remove nits and lice every 2-3 days. Do this for 2-3 weeks to be sure that all lice and nits are gone.
All household members and other close contacts should be checked and treated if necessary. If an over-the-counter treatment does not work for you, you can ask your health care provider for a prescription product.
How can I prevent head lice?
There are steps you can take to prevent the spread of lice. If you already have lice, besides treatment, you should
- Wash your clothes, bedding, and towels with hot water, and dry them using the hot cycle of the dryer
- Soak your combs and brushes in hot water for 5-10 minutes
- Vacuum the floor and furniture, particularly where you sat or lay
- If there are items that you cannot wash, seal them in a plastic bag for two weeks
To prevent your children from spreading lice:
- Teach children to avoid head-to-head contact during play and other activities
- Teach children not to share clothing and other items that they put on their head, such as headphones, hair ties, and helmets
- If your child has lice, be sure to check the policies at school and/or daycare. Your child may not be able to go back until the lice have been completely treated.
There is no clear scientific evidence that lice can be suffocated by home remedies, such as mayonnaise, olive oil, or similar substances. You also should not use kerosene or gasoline; they are dangerous and flammable.
Centers for Disease Control and Prevention
- Head lice (Medical Encyclopedia)
- Treating Head Lice (Food and Drug Administration)
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 (Medical Encyclopedia)
- Amebic liver abscess (Medical Encyclopedia)
- Ascariasis (Medical Encyclopedia)
- Creeping eruption (Medical Encyclopedia)
- Stool ova and parasites exam (Medical Encyclopedia)
- Taeniasis (Medical Encyclopedia)
General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
- Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
- No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
- Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.
Present on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.