ICD-10-CM 2027
ICD-10 code for infestation
From the official ICD-10-CM alphabetic index entry “Infestation”. Page updated September 29, 2026.
About coding infestation
The ICD-10-CM code for infestation is B88.9 (Infestation, unspecified). The official index lists 231 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B88.9.
Within B88, choose B88.9 (Infestation, unspecified) only when documentation doesn't support a more specific option: other acariasis (B88.0), Tungiasis [sandflea infestation] (B88.1), other arthropod infestations (B88.2), external hirudiniasis (B88.3) and other specified infestations (B88.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific infestation codes (official index)
- Acanthocheilonema (perstans) (streptocerca) B74.4 — Mansonelliasis
- Acariasis B88.09 — Other acariasis
- demodex folliculorum B88.01 — Infestation by Demodex mites
- sarcoptes scabiei B86 — Scabies
- trombiculae B88.09 — Other acariasis
- Agamofilaria streptocerca B74.4 — Mansonelliasis
- Ancylostoma, ankylostoma (braziliense) (caninum) (ceylanicum) (duodenale) B76.0 — Ancylostomiasis
- americanum B76.1 — Necatoriasis
- new world B76.1 — Necatoriasis
- Anisakis larvae, anisakiasis B81.0 — Anisakiasis
- arthropod NEC B88.2 — Other arthropod infestations
- Ascaris lumbricoides
- Balantidium coli A07.0 — Balantidiasis
- beef tapeworm B68.1 — Taenia saginata taeniasis
- Bothriocephalus (latus) B70.0 — Diphyllobothriasis
- larval B70.1 — Sparganosis
- broad tapeworm B70.0 — Diphyllobothriasis
- larval B70.1 — Sparganosis
- Brugia (malayi) B74.1 — Filariasis due to Brugia malayi
- timori B74.2 — Filariasis due to Brugia timori
- candiru B88.8 — Other specified infestations
- Capillaria
- hepatica B83.8 — Other specified helminthiases
- philippinensis B81.1 — Intestinal capillariasis
- cat liver fluke B66.0 — Opisthorchiasis
- cestodes B71.9 — Cestode infection, unspecified
- diphyllobothrium
- dipylidiasis B71.1 — Dipylidiasis
- hymenolepiasis B71.0 — Hymenolepiasis
- specified type NEC B71.8 — Other specified cestode infections
- chigger B88.09 — Other acariasis
- chigo, chigoe B88.1 — Tungiasis [sandflea infestation]
- Clonorchis (sinensis) (liver) B66.1 — Clonorchiasis
- coccidial A07.3 — Isosporiasis
- crab-lice B85.3 — Phthiriasis
- Cysticercus cellulosae
- Demodex (brevis) (folliculorum) B88.01 — Infestation by Demodex mites
- Dermanyssus gallinae B88.09 — Other acariasis
- Dermatobia (hominis)
- Dibothriocephalus (latus) B70.0 — Diphyllobothriasis
- larval B70.1 — Sparganosis
- Dicrocoelium dendriticum B66.2 — Dicroceliasis
- Diphyllobothrium (adult) (latum) (intestinal) (pacificum) B70.0 — Diphyllobothriasis
- larval B70.1 — Sparganosis
- Diplogonoporus (grandis) B71.8 — Other specified cestode infections
- Dipylidium caninum B67.4 — Echinococcus granulosus infection, unspecified
- Distoma hepaticum B66.3 — Fascioliasis
- dog tapeworm B67.4 — Echinococcus granulosus infection, unspecified
- Dracunculus medinensis B72 — Dracunculiasis
- dragon worm B72 — Dracunculiasis
- dwarf tapeworm B71.0 — Hymenolepiasis
- Echinococcus
- Echinostomum ilocanum B66.8 — Other specified fluke infections
- Entamoeba (histolytica)
- Enterobius vermicularis B80 — Enterobiasis
- eyelid
- in (due to)
- leishmaniasis B55.1 — Cutaneous leishmaniasis
- loiasis B74.3 — Loiasis
- onchocerciasis B73.09 — Onchocerciasis with other eye involvement
- phthiriasis B85.3 — Phthiriasis
- parasitic NOS B89 — Unspecified parasitic disease
- eyeworm B74.3 — Loiasis
- Fasciola (gigantica) (hepatica) (indica) B66.3 — Fascioliasis
- Fasciolopsis (buski) (intestine) B66.5 — Fasciolopsiasis
- filarial B74.9 — Filariasis, unspecified
- bancroftian B74.0 — Filariasis due to Wuchereria bancrofti
- conjunctiva B74.9 — Filariasis, unspecified
- due to
- Acanthocheilonema (perstans) (streptocerca) B74.4 — Mansonelliasis
- Brugia (malayi) B74.1 — Filariasis due to Brugia malayi
- timori B74.2 — Filariasis due to Brugia timori
- Dracunculus medinensis B72 — Dracunculiasis
- guinea worm B72 — Dracunculiasis
- loa loa B74.3 — Loiasis
- Mansonella (ozzardi) (perstans) (streptocerca) B74.4 — Mansonelliasis
- Onchocerca volvulus B73.00 — Onchocerciasis with eye involvement, unspecified
- eye B73.00 — Onchocerciasis with eye involvement, unspecified
- eyelid B73.09 — Onchocerciasis with other eye involvement
- Wuchereria (bancrofti) B74.0 — Filariasis due to Wuchereria bancrofti
- Malayan B74.1 — Filariasis due to Brugia malayi
- ozzardi B74.4 — Mansonelliasis
- specified type NEC B74.8 — Other filariases
- fish tapeworm B70.0 — Diphyllobothriasis
- larval B70.1 — Sparganosis
- fluke B66.9 — Fluke infection, unspecified
- blood NOS
- cat liver B66.0 — Opisthorchiasis
- intestinal B66.5 — Fasciolopsiasis
- liver (sheep) B66.3 — Fascioliasis
- cat B66.0 — Opisthorchiasis
- Chinese B66.1 — Clonorchiasis
- due to clonorchiasis B66.1 — Clonorchiasis
- oriental B66.1 — Clonorchiasis
- lancet B66.2 — Dicroceliasis
- lung (oriental) B66.4 — Paragonimiasis
- sheep liver B66.3 — Fascioliasis
- specified type NEC B66.8 — Other specified fluke infections
- fly larvae
- Gasterophilus (intestinalis)
- Gastrodiscoides hominis B66.8 — Other specified fluke infections
- Giardia lamblia A07.1 — Giardiasis [lambliasis]
- Gnathostoma (spinigerum) B83.1 — Gnathostomiasis
- Gongylonema B83.8 — Other specified helminthiases
- guinea worm B72 — Dracunculiasis
- helminth B83.9 — Helminthiasis, unspecified
- angiostrongyliasis B83.2 — Angiostrongyliasis due to Parastrongylus cantonensis
- intestinal B81.3 — Intestinal angiostrongyliasis
- gnathostomiasis B83.1 — Gnathostomiasis
- hirudiniasis, internal B83.4 — Internal hirudiniasis
- intestinal B82.0 — Intestinal helminthiasis, unspecified
- angiostrongyliasis B81.3 — Intestinal angiostrongyliasis
- anisakiasis B81.0 — Anisakiasis
- ascariasis
- capillariasis B81.1 — Intestinal capillariasis
- cysticercosis
- diphyllobothriasis
- dracunculiasis B72 — Dracunculiasis
- echinococcus
- enterobiasis B80 — Enterobiasis
- filariasis
- fluke
- hookworm
- mixed (types classifiable to more than one of the titles B65.0-B81.3 and B81.8) B81.4 — Mixed intestinal helminthiases
- onchocerciasis
- schistosomiasis
- specified
- cestode NEC
- type NEC B81.8 — Other specified intestinal helminthiases
- strongyloidiasis
- taenia
- trichinellosis B75 — Trichinellosis
- trichostrongyliasis B81.2 — Trichostrongyliasis
- trichuriasis B79 — Trichuriasis
- specified type NEC B83.8 — Other specified helminthiases
- syngamiasis B83.3 — Syngamiasis
- visceral larva migrans B83.0 — Visceral larva migrans
- Heterophyes (heterophyes) B66.8 — Other specified fluke infections
- hookworm B76.9 — Hookworm disease, unspecified
- ancylostomiasis B76.0 — Ancylostomiasis
- necatoriasis B76.1 — Necatoriasis
- specified type NEC B76.8 — Other hookworm diseases
- Hymenolepis (diminuta) (nana) B71.0 — Hymenolepiasis
- intestinal NEC B82.9 — Intestinal parasitism, unspecified
- leeches (aquatic) (land)
- Leishmania
- lice, louse
- Linguatula B88.8 — Other specified infestations
- Liponyssoides sanguineus B88.09 — Other acariasis
- Loa loa B74.3 — Loiasis
- conjunctival B74.3 — Loiasis
- eyelid B74.3 — Loiasis
- louse
- maggots
- Mansonella (ozzardi) (perstans) (streptocerca) B74.4 — Mansonelliasis
- Medina (worm) B72 — Dracunculiasis
- Metagonimus (yokogawai) B66.8 — Other specified fluke infections
- microfilaria streptocerca
- eye B73.00 — Onchocerciasis with eye involvement, unspecified
- eyelid B73.09 — Onchocerciasis with other eye involvement
- mites B88.9 — Infestation, unspecified
- Demodex B88.01 — Infestation by Demodex mites
- scabic B86 — Scabies
- Monilia (albicans)
- mouth B37.0 — Candidal stomatitis
- Necator americanus B76.1 — Necatoriasis
- nematode NEC (intestinal) B82.0 — Intestinal helminthiasis, unspecified
- Ancylostoma B76.0 — Ancylostomiasis
- conjunctiva NEC B83.9 — Helminthiasis, unspecified
- Enterobius vermicularis B80 — Enterobiasis
- Gnathostoma spinigerum B83.1 — Gnathostomiasis
- physaloptera B80 — Enterobiasis
- specified NEC B81.8 — Other specified intestinal helminthiases
- trichostrongylus B81.2 — Trichostrongyliasis
- trichuris (trichuria) B79 — Trichuriasis
- Oesophagostomum (apiostomum) B81.8 — Other specified intestinal helminthiases
- Oestrus ovis B87.9 — Myiasis, unspecified
- Onchocerca (volvulus)
- Opisthorchis (felineus) (viverrini) B66.0 — Opisthorchiasis
- orbit, parasitic NOS B89 — Unspecified parasitic disease
- Oxyuris vermicularis B80 — Enterobiasis
- Paragonimus (westermani) B66.4 — Paragonimiasis
- parasite, parasitic B89 — Unspecified parasitic disease
- eyelid B89 — Unspecified parasitic disease
- intestinal NOS B82.9 — Intestinal parasitism, unspecified
- mouth B37.0 — Candidal stomatitis
- skin B88.9 — Infestation, unspecified
- tongue B37.0 — Candidal stomatitis
- Parastrongylus
- cantonensis B83.2 — Angiostrongyliasis due to Parastrongylus cantonensis
- costaricensis B81.3 — Intestinal angiostrongyliasis
- Pediculus B85.2 — Pediculosis, unspecified
- body B85.1 — Pediculosis due to Pediculus humanus corporis
- capitis (humanus) (any site) B85.0 — Pediculosis due to Pediculus humanus capitis
- corporis (humanus) (any site) B85.1 — Pediculosis due to Pediculus humanus corporis
- head B85.0 — Pediculosis due to Pediculus humanus capitis
- mixed (classifiable to more than one of the titles B85.0-B85.3) B85.4 — Mixed pediculosis and phthiriasis
- pubis (any site) B85.3 — Phthiriasis
- Pentastoma B88.8 — Other specified infestations
- pest Z59.19 — Other inadequate housing
- Phthirus (pubis) (any site) B85.3 — Phthiriasis
- with any infestation classifiable to B85.0-B85.2 B85.4
- pinworm B80 — Enterobiasis
- pork tapeworm (adult) B68.0 — Taenia solium taeniasis
- protozoal NEC B64 — Unspecified protozoal disease
- intestinal A07.9 — Protozoal intestinal disease, unspecified
- specified NEC A07.8 — Other specified protozoal intestinal diseases
- specified NEC B60.8 — Other specified protozoal diseases
- pubic, louse B85.3 — Phthiriasis
- rat tapeworm B71.0 — Hymenolepiasis
- red bug B88.09 — Other acariasis
- roundworm (large) NEC B82.0 — Intestinal helminthiasis, unspecified
- Ascariasis B77.9 — Ascariasis, unspecified
- sandflea B88.1 — Tungiasis [sandflea infestation]
- Sarcoptes scabiei B86 — Scabies
- scabies B86 — Scabies
- Schistosoma B65.9 — Schistosomiasis, unspecified
- bovis B65.8 — Other schistosomiasis
- cercariae B65.3 — Cercarial dermatitis
- haematobium B65.0 — Schistosomiasis due to Schistosoma haematobium [urinary schistosomiasis]
- intercalatum B65.8 — Other schistosomiasis
- japonicum B65.2 — Schistosomiasis due to Schistosoma japonicum
- mansoni B65.1 — Schistosomiasis due to Schistosoma mansoni [intestinal schistosomiasis]
- mattheei B65.8 — Other schistosomiasis
- mekongi B65.8 — Other schistosomiasis
- specified type NEC B65.8 — Other schistosomiasis
- spindale B65.8 — Other schistosomiasis
- screw worms
- skin NOS B88.9 — Infestation, unspecified
- Sparganum (mansoni) (proliferum) (baxteri) B70.1 — Sparganosis
- larval B70.1 — Sparganosis
- specified type NEC B88.8 — Other specified infestations
- Spirometra larvae B70.1 — Sparganosis
- Stellantchasmus falcatus B66.8 — Other specified fluke infections
- Strongyloides stercoralis
- Taenia B68.9 — Taeniasis, unspecified
- diminuta B71.0 — Hymenolepiasis
- echinococcus
- mediocanellata B68.1 — Taenia saginata taeniasis
- nana B71.0 — Hymenolepiasis
- saginata B68.1 — Taenia saginata taeniasis
- solium (intestinal form) B68.0 — Taenia solium taeniasis
- larval form
- Taeniarhynchus saginatus B68.1 — Taenia saginata taeniasis
- tapeworm B71.9 — Cestode infection, unspecified
- beef B68.1 — Taenia saginata taeniasis
- broad B70.0 — Diphyllobothriasis
- larval B70.1 — Sparganosis
- dog B67.4 — Echinococcus granulosus infection, unspecified
- dwarf B71.0 — Hymenolepiasis
- fish B70.0 — Diphyllobothriasis
- larval B70.1 — Sparganosis
- pork B68.0 — Taenia solium taeniasis
- rat B71.0 — Hymenolepiasis
- Ternidens diminutus B81.8 — Other specified intestinal helminthiases
- Tetranychus molestissimus B88.09 — Other acariasis
- threadworm B80 — Enterobiasis
- tongue B37.0 — Candidal stomatitis
- Toxocara (canis) (cati) (felis) B83.0 — Visceral larva migrans
- trematode (s) NEC
- Trichinella (spiralis) B75 — Trichinellosis
- Trichocephalus B79 — Trichuriasis
- Trichomonas
- Trichostrongylus B81.2 — Trichostrongyliasis
- Trichuris (trichiura) B79 — Trichuriasis
- Trombicula (irritans) B88.09 — Other acariasis
- Tunga penetrans B88.1 — Tungiasis [sandflea infestation]
- Uncinaria americana B76.1 — Necatoriasis
- Vandellia cirrhosa B88.8 — Other specified infestations
- whipworm B79 — Trichuriasis
- worms B83.9 — Helminthiasis, unspecified
- intestinal B82.0 — Intestinal helminthiasis, unspecified
- Wuchereria (bancrofti) B74.0 — Filariasis due to Wuchereria bancrofti
Common questions about infestation ICD-10 codes
What is the ICD-10 code for infestation?
- B88.9 — Infestation, unspecified. More specific codes apply when the documentation supports them: B74.4, B88.09, B88.01, B86 and others below.
What is the ICD-10 code for acanthocheilonema infestation?
- B74.4 — Mansonelliasis.
What is the ICD-10 code for acariasis infestation?
- B88.09 — Other acariasis.
What is the ICD-10 code for agamofilaria streptocerca infestation?
- B74.4 — Mansonelliasis.
What is the ICD-10 code for arthropod nec infestation?
- B88.2 — Other arthropod infestations.
What is the ICD-10 code for balantidium coli infestation?
- A07.0 — Balantidiasis.
What is the ICD-10 code for beef tapeworm infestation?
- B68.1 — Taenia saginata taeniasis.
Is B88.9 billable?
- Yes. B88.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B88.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B88.9 as a principal diagnosis.
Is B88.9 a CC or MCC?
- No. B88.9 is neither a CC nor an MCC under MS-DRG v44.0.