B81.2 Trichostrongyliasis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from B81 Other intestinal helminthiases, not elsewhere classified

Excludes1 (never code together)

• angiostrongyliasis due to:
• Angiostrongylus cantonensis (B83.2)
• Parastrongylus cantonensis (B83.2)

MS-DRG index

Defines the logic of DRG(s) 391-392 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 127.6 Trichostrongyliasis

Code annotations containing back-references to B81.2

Back-references to B81.2

• Type 1 Excludes: B78 Strongyloidiasis ("trichostrongyliasis (B81.2)")

Back-references to B81

• Code First: H94.0 Acoustic neuritis in infectious and parasitic diseases classified elsewhere ("parasitic disease (B65-B89)")
• Type 2 Excludes: J82 Pulmonary eosinophilia, not elsewhere classified ("pulmonary eosinophilia due to specified parasitic infection (B50-B83)")

Diagnosis Index entries for B81.2

• Infection, infected, infective (opportunistic) › Trichostrongylus
• Infestation › helminth › intestinal › trichostrongyliasis
• Infestation › nematode NEC (intestinal) › trichostrongylus
• Infestation › Trichostrongylus
• Trichostrongyliasis, trichostrongylosis (small intestine)
• Trichostrongylus infection

Nearby codes

• B81 Other intestinal helminthiases, not elsewhere classified
• B81.0 Anisakiasis
• B81.1 Intestinal capillariasis
• B81.2 Trichostrongyliasis (this code)
• B81.3 Intestinal angiostrongyliasis
• B81.4 Mixed intestinal helminthiases
• B81.8 Other specified intestinal helminthiases