All ICD10 Codes

B81

Non-Billable
ChapterA00–B99
Rankcategory
Official Description

Other intestinal helminthiases, not elsewhere classified

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

Instructional Notes

Excludes1(Not coded here)
  • angiostrongyliasis due to:
  • Angiostrongylus cantonensis (B83.2)
  • Parastrongylus cantonensis (B83.2)

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)
B65-B83Helminthiases (B65-B83)
B81Other intestinal helminthiases, not elsewhere classified
B81.0Anisakiasis
B81.1Intestinal capillariasis
B81.2Trichostrongyliasis
B81.3Intestinal angiostrongyliasis
B81.4Mixed intestinal helminthiases
B81.8Other specified intestinal helminthiases

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to B81:

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to B81. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Angiostrongyliasis2 unique routes
due to
Parastrongylus
costaricensis→B81
intestinal→B81
Anisakiasis (infection) (infestation)1 unique routes
Direct index entry→B81
Anisakis larvae infestation1 unique routes
Direct index entry→B81
Capillariasis (intestinal)1 unique routes
Direct index entry→B81
Diarrhea, diarrheal (disease) (infantile) (inflammatory)1 unique routes
due to
Capillaria philippinensis→B81
Esophagostomiasis1 unique routes
Direct index entry→B81
Helminthiasis3 unique routes
intestinal(2 variants)
mixed types (types classifiable to more than one of the titles B65.0-B81.3 and B81.8)→B81
specified type NEC→B81
mixed types (intestinal) (types classifiable to more than one of the titles B65.0-B81.3 and B81.8)→B81
Infection, infected, infective (opportunistic)9 unique routes
Anisakiasis, Anisakis larvae→B81
Capillaria (intestinal)→B81(2 variants)
philippinensis→B81
helminths(2 variants)
intestinal(2 variants)
mixed (types classifiable to more than one of the titles B65.0-B81.3 and B81.8)→B81
specified type NEC→B81
Oesophagostomum (apiostomum)→B81
Parastrongylus
costaricensis→B81
Ternidens diminutus→B81
Trichostrongylus→B81
Infestation6 unique routes
Anisakis larvae, anisakiasis→B81
Capillaria
philippinensis→B81
Oesophagostomum (apiostomum)→B81
Parastrongylus
costaricensis→B81
Ternidens diminutus→B81
Trichostrongylus→B81

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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