Infestations By Ectoparasites – Definitions & ICD 11 Codes

Definition of Infestations By Ectoparasites: Diseases caused by parasitic organisms which normally live on the surface of the host.

Coded Elsewhere:

• Epidemic louse-borne typhus fever due to Rickettsia prowazekii (1C30.0)
• Recrudescent typhus (1C30.1)

Pediculosis

Definition of Pediculosis: A condition of the skin, hair, or genital region caused by an infection with the parasite Pediculus. This disease is characterised by pruritus. This condition also presents with symptoms depending on the site of infection. Transmission is by direct or indirect contact with an infected individual or animal. Confirmation is by identification of Pediculus.

ICD 11 Code For Pediculosis

  1G00  Pediculosis

1G00.0 Pediculosis capitis

Definition of Pediculosis capitis: A condition of the scalp and hair shaft, caused by an infection with the parasite Pediculus humanus capitis. This condition is characterised by pruritus which may lead to sores or thickened discoloured skin. Transmission is by direct or indirect contact with an infected individual or animal. Confirmation is by identification of Pediculus humanus capitis eggs or Pediculus humanus capitis.

1G00.1 Pediculosis corporis

Definition of Pediculosis corporis: A condition of the skin, caused by an infection with the parasite Pediculus humanus corporis. This condition is characterised by pruritus which may lead to sores or thickened discoloured skin. Transmission is by direct or indirect contact with an infected individual or animal. Confirmation is by identification of Pediculus humanus corporis eggs or Pediculus humanus corporis.

1G00.Z Pediculosis of unspecified site or type

Myiasis

Definition of Myiasis: A disease of the tissues, caused by an infection with fly larvae from the order Diptera. This disease is characterised by a lump developing in the tissue. Transmission is by ingestion of contaminated larvae, direct contact with an infected mosquito, tick, fly, or indirect contact with infected fly eggs. Confirmation is by identification of Diptera from a tissue sample.

ICD 11 Code For Myiasis

  1G01  Myiasis

Inclusions:

• infestation by larvae of flies

1G01.0 Ocular myiasis

Definition of Ocular myiasis: A disease of the eye, caused by an infection with fly larvae from the order Diptera. This disease is characterised by a lump developing in the tissue. Transmission is by ingestion of contaminated larvae, direct contact with an infected mosquito, tick, fly, or indirect contact with infected fly eggs. Confirmation is by identification of Diptera.

1G01.1 Nasopharyngeal myiasis

1G01.2 Laryngeal myiasis

1G01.3 Cutaneous myiasis

Definition of Cutaneous myiasis: The infestation of the skin or subcutaneous tissues by the larvae of certain flies (Phormia regina, Cordylobia anthropophaga, Cochliomyia hominivorax, C. macellaria, Wohlfahrtia vigil, W. meigeni, W. opaca, Dermatobia hominis, Sarcophaga krameri). characterised by a painful boil-like lesion containing one or more larvae with severe pruritus and local destruction of tissue.

1G01.Y Other specified myiasis

1G01.Z Myiasis unspecified

External hirudiniasis

Definition of External hirudiniasis: Infestation of the skin by leeches. Sensitisation to antigenic substances deposited in the skin can result in urticarial weals and bullae.

ICD 11 Code For External hirudiniasis

  1G02  External hirudiniasis

Exclusions:

• Internal hirudiniasis

Pthiriasis

Definition of Pthiriasis: Infestation most commonly of pubic hair and less commonly of body hair or eyelashes by the crab louse, Pthirus pubis. Transmission is by direct, typically sexual contact with an infected individual. Confirmation is by identification of Pthirus pubis or its eggs.

ICD 11 Code For Pthiriasis

  1G03  Pthiriasis

Inclusions:

• Infestation by crab lice

Scabies

Definition of Scabies: A highly contagious infestation of the skin by the mite Sarcoptes scabiei var. hominis. It may result in epidemics when introduced into institutions such as schools and nursing homes. The mites burrow into the skin, favouring the extremities, genitalia and, in infants, the axillae. The characteristic widespread intensely pruritic papulovesicular rash results largely from the host response rather than directly to burrowing by mites. Where such a response is absent as in immunosuppressed or debilitated patients, unchecked proliferation of mites results in crusted scabies. Sarcoptic mites from other mammals such as dogs may cause a transient pruritic eruption.

ICD 11 Code For Scabies

  1G04  Scabies

1G04.0 Classical scabies

1G04.1 Crusted scabies

Definition of Crusted scabies: Crusted scabies results from unchecked proliferation of the human scabies mite in individuals who are unable to mount an adequate immune response to infestation. Extensive thick crusts containing vast numbers of mites form over the skin, particularly of the extremities. Because itching is usually absent, the diagnosis is frequently overlooked. Patients with crusted scabies may serve as the source for widespread outbreaks of scabies in institutions such as hospitals and care homes.

1G04.Y Other and unspecified scabies

Tungiasis

Definition of Tungiasis: A disease of the skin, caused by an infection with the parasite Tunga penetrans. This disease is characterised by lesions (white patch with a black dot in the middle), skin inflammation, or pruritus surrounding the lesion. This disease may also be asymptomatic. Transmission is through the bite of an infected flea, or by direct contact with an infected animal. Confirmation is by identification of Tunga penetrans or travel history.

ICD 11 Code For Tungiasis

  1G05  Tungiasis

Cimicosis

Definition of Cimicosis: Infestation by bedbugs, which are blood-sucking temporary ectoparasites. The most common species to attack humans is Cimex lectularius. In individuals who are not sensitized by previous exposure, there may be no symptoms or signs other than purpuric macules at the sites of bites. Weals, papules or bullae may occur in sensitized individuals.

ICD 11 Code For Cimicosis

  1G06  Cimicosis

Infestation by mites

ICD 11 Code For Infestation by mites

  1G07  Infestation by mites

Coded Elsewhere:

• Scabies (1G04)
• Cutaneous reactions to zoonotic mites (NE61)

1G07.0 Infestation by Demodex

Definition of Infestation by Demodex: Infestation with Demodex mites. Demodex folliculorum is a saprophytic mite of the human pilosebaceous unit with a predilection for facial skin and eyelashes. Demodex brevis is found in the sebaceous glands of the eyelash follicle and in the lobules of eyelid meibomian glands. Although infestation is very common and normally symptomless, the mites have been linked to papulopustular rosacea and chronic blepharitis.

1G07.Y Infestation of the skin by other specified parasitic mites

Infestation by other specified ectoparasite

ICD 11 Code For Infestation by other specified ectoparasite

  1G0Y  Infestation by other specified ectoparasite

Infestation by unknown or unspecified ectoparasite

ICD 11 Code For Infestation by unknown or unspecified ectoparasite

  1G0Z  Infestation by unknown or unspecified ectoparasite

Other specified parasitic diseases

ICD 11 Code For Other specified parasitic diseases

  1G2Y  Other specified parasitic diseases

Unspecified parasitic diseases

ICD 11 Code For Unspecified parasitic diseases

  1G2Z  Unspecified parasitic diseases