2026 ICD-10-CM Diagnosis Code B79Trichuriasis
ICD-10-CM Codes›A00–B99›B65-B83›B79
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B79 is a billable ICD-10-CM diagnosis code for trichuriasis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 391 through 392. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 16 closely related codes. Coders also document this condition as infection by Trichuris globulosa. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Infection by Trichuris globulosa
- Infection by Trichuris ovis
- Infection by Trichuris suis
- Infection by Trichuris trichiura
- Infection by Trichuris vulpis
- Trichuriasis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Includes
- trichocephaliasis
- whipworm (disease)(infection)
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disease, diseased See Also: Syndrome;
whipworm B79
Trichuriasis B79
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Trichuriasis
infection with nematodes of the genus trichuris, formerly called trichocephalus.Trichuris
a genus of nematode worms comprising the whipworms.
Patient EducationClinical
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 the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert B79 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B79Overview
What is the ICD-10 code for trichuriasis?
The ICD-10-CM code for trichuriasis is B79. It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is B79 (Trichuriasis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report trichuriasis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does B79 group to?
When trichuriasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, with relative weights from 0.7796 to 1.2683 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B79 a CC or MCC?
CMS lists B79 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 16 closely related codes in its exclusion list.
What is the ICD-9 equivalent of B79?
Under the General Equivalence Mappings, trichuriasis converts to ICD-9-CM 127.3 (trichuriasis). The mapping is a direct match.
