DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

B81 Other intestinal helminthiases, not elsewhere classified

  • Header · not billable

B81 is not billable. The category heads 6 billable codes in FY2027: the 6 codes directly below it.

Index → code

  • Ternidensiasis → B81.8
  • Physalopteriasis → B81.8
  • Esophagostomiasis → B81.8

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. B65-B83 Helminthiases (B65-B83)
  3. B81 Other intestinal helminthiases, not elsewhere classified
Billable codes
6
Subdivisions
6
CC / MCC codes
6 / 0
HCC V28 codes
0
New FY2027
0
Index entries
39

Codes in B81

  1. B81.0
    Anisakiasis
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Infection due to Anisakis larva
  2. B81.1
    Intestinal capillariasis
    BillableCC
    Inclusion terms 2, Excludes2 1

    Inclusion terms

    • Capillariasis NOS
    • Infection due to Capillaria philippinensis

    Excludes2

    • hepatic capillariasis (B83.8) B83.8
  3. B81.2
    Trichostrongyliasis
    BillableCC
  4. B81.3
    Intestinal angiostrongyliasis
    BillableCC
    Inclusion terms 3

    Inclusion terms

    • Angiostrongyliasis due to:
    • Angiostrongylus costaricensis
    • Parastrongylus costaricensis
  5. B81.4
    Mixed intestinal helminthiases
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Infection due to intestinal helminths classified to more than one of the categories B65.0-B81.3 and B81.8 B65.0 B81.3 B81.8
    • Mixed helminthiasis NOS
  6. B81.8
    Other specified intestinal helminthiases
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Infection due to Oesophagostomum species [esophagostomiasis]
    • Infection due to Ternidens diminutus [ternidensiasis]

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At B81

Excludes1

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

Notes that also apply

Chapter 1 instructions (Includes 1, Excludes2 5, Use additional code 1): printed on the chapter 1 page.

Index entries

  • Anisakiasis (infection) (infestation) → B81.0
  • Anisakis larvae infestation → B81.0
  • Capillariasis (intestinal) → B81.1
  • Trichostrongyliasis, trichostrongylosis (small intestine) → B81.2
  • Trichostrongylus infection → B81.2
  • Esophagostomiasis → B81.8
  • Physalopteriasis → B81.8
  • Ternidens diminutus infestation → B81.8
  • Ternidensiasis → B81.8
  • Infection, infected, infective (opportunistic)Anisakiasis, Anisakis larvae → B81.0
  • InfestationAnisakis larvae, anisakiasis → B81.0
  • Infection, infected, infective (opportunistic)Capillaria (intestinal) → B81.1
  • Infection, infected, infective (opportunistic)Trichostrongylus → B81.2
  • InfestationTrichostrongylus → B81.2
  • Angiostrongyliasisintestinal → B81.3
  • Helminthiasismixed types (intestinal) (types classifiable to more than one of the titles B65.0-B81.3 and B81.8) → B81.4
  • Infection, infected, infective (opportunistic)Oesophagostomum (apiostomum) → B81.8
  • Infection, infected, infective (opportunistic)Ternidens diminutus → B81.8
  • InfestationOesophagostomum (apiostomum) → B81.8
  • InfestationTernidens diminutus → B81.8
  • Diarrhea, diarrheal (disease) (infantile) (inflammatory)due toCapillaria philippinensis → B81.1
  • Infection, infected, infective (opportunistic)Capillaria (intestinal)philippinensis → B81.1
  • InfestationCapillariaphilippinensis → B81.1
  • Infestationnematode NEC (intestinal)trichostrongylus → B81.2
  • Infection, infected, infective (opportunistic)Parastrongyluscostaricensis → B81.3
  • InfestationParastrongyluscostaricensis → B81.3
  • Helminthiasisintestinalmixed types (types classifiable to more than one of the titles B65.0-B81.3 and B81.8) → B81.4
  • Helminthiasisintestinalspecified type NEC → B81.8
  • Infestationnematode NEC (intestinal)specified NEC → B81.8
  • Infestationhelminthintestinalanisakiasis → B81.0
  • Infestationhelminthintestinalcapillariasis → B81.1
  • Infestationhelminthintestinaltrichostrongyliasis → B81.2
  • Angiostrongyliasisdue toParastrongyluscostaricensis → B81.3
  • Infestationhelminthangiostrongyliasisintestinal → B81.3
  • Infestationhelminthintestinalangiostrongyliasis → B81.3
  • Infection, infected, infective (opportunistic)helminthsintestinalmixed (types classifiable to more than one of the titles B65.0-B81.3 and B81.8) → B81.4
  • Infestationhelminthintestinalmixed (types classifiable to more than one of the titles B65.0-B81.3 and B81.8) → B81.4
  • Infection, infected, infective (opportunistic)helminthsintestinalspecified type NEC → B81.8
  • Infestationhelminthintestinalspecifiedtype NEC → B81.8

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy