B81.1 Intestinal capillariasis

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

Applicable to

• Capillariasis NOS
• Infection due to Capillaria philippinensis

Excludes2 (not included here)

• hepatic capillariasis (B83.8)

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)

• 127.5 Capillariasis

Code annotations containing back-references to B81.1

Back-references to B81.1

• Type 1 Excludes: B83 Other helminthiases ("capillariasis NOS (B81.1)")
• Type 2 Excludes: B83 Other helminthiases ("intestinal capillariasis (B81.1)")

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 B81.1

• Capillariasis (intestinal)
• Diarrhea, diarrheal (disease) (infantile) (inflammatory) › due to › Capillaria philippinensis
• Infection, infected, infective (opportunistic) › Capillaria (intestinal)
• Infection, infected, infective (opportunistic) › Capillaria (intestinal) › philippinensis
• Infestation › Capillaria › philippinensis
• Infestation › helminth › intestinal › capillariasis

Nearby codes

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