ICD-10-CM 2027
ICD-10 code for Trichocephalus infestation
From the official ICD-10-CM alphabetic index entry “Infestation › Trichocephalus”. Page updated September 29, 2026.
About coding Trichocephalus infestation
The ICD-10-CM code for Trichocephalus infestation is B79 (Trichuriasis).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Common questions about Trichocephalus infestation ICD-10 codes
What is the ICD-10 code for Trichocephalus infestation?
- B79 — Trichuriasis.
Is B79 billable?
- Yes. B79 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B79 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B79 as a principal diagnosis.
Is B79 a CC or MCC?
- B79 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.