Trichuriasis
In Helminthiases (B65-B83), chapter 1: Certain Infectious and Parasitic Diseases
- B79 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under B65-B83 below.
- As a secondary diagnosis it is a CC (complication or comorbidity), which can raise the MS-DRG payment. It doesn't count when the principal diagnosis is one of 16 closely related codes.
- Doesn't count toward a Medicare Advantage risk score (no HCC in V28).
- AHRQ's Chronic Condition Indicator classes it as not chronic (an acute or short-term condition).
Also indexed as: Diarrhea, due to, Trichuris trichiuria; Disease, whipworm; Infection, Trichuris; Infection, whipworm; Infestation, helminth, intestinal, trichuriasis; Infestation, nematode NEC, trichuris; Infestation, Trichocephalus; Infestation, Trichuris; Infestation, whipworm; Prolapse, rectum, due to trichuris trichuria; Trichocephaliasis; Trichocephalus infestation; Trichuriasis; Trichuris trichiura; Whipworm
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Instructional notes
Includes: conditions that are coded here
- trichocephaliasis
- whipworm (disease)(infection)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Rules for coding infections and parasitic diseases, including HIV, organism and drug resistance codes, sepsis and septic shock, MRSA, Zika, and COVID-19.
- Human Immunodeficiency Virus (HIV) Infections (page 19)
- Infectious agents as the cause of diseases classified to other chapters (page 22)
- Infections resistant to antibiotics (page 22)
- Sepsis, Severe Sepsis, and Septic Shock (page 23)
- Methicillin Resistant Staphylococcus aureus (MRSA) Conditions (page 27)
- Zika virus infections (page 28)
- Coronavirus infections (page 28)
Other codes under B65-B83
Helminthiases (B65-B83)
- B65Schistosomiasis [bilharziasis]
- B66Other fluke infections
- B67Echinococcosis
- B68Taeniasis
- B69Cysticercosis
- B70Diphyllobothriasis and sparganosis
- B71Other cestode infections
- B72Dracunculiasis
- B73Onchocerciasis
- B74Filariasis
- B75Trichinellosis
- B76Hookworm diseases
- B77Ascariasis
- B78Strongyloidiasis
- B79Trichuriasis(this code)
- B80Enterobiasis
- B81Other intestinal helminthiases, not elsewhere classified
- B82Unspecified intestinal parasitism
- B83Other helminthiases
B79 MS-DRGs
As the principal diagnosis, B79 groups to MS-DRG 391 or 392 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Related conditions
Grouped by AHRQ's Clinical Classifications Software Refined (CCSR), which sorts every diagnosis code into clinically meaningful categories.
B79 is in Parasitic, other specified and unspecified infections (INF009, its default category), with 254 codes. Others in it:
Medicare coverage articles listing B79
This Medicare billing and coding article lists B79 as a diagnosis that supports medical necessity for the services they cover. From the CMS Medicare Coverage Database; check your own contractor's article before billing.
- Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy (2 contractors)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
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.
Read more about parasitic diseases on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 127.3 Trichuriasis