DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 1

B50-B64 Protozoal diseases (B50-B64)

Block B50-B64 groups 12 categories with 57 billable codes in FY2027.

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. B50-B64 Protozoal diseases (B50-B64)

Neighbouring blocks

Categories
12
Billable codes
57
CC codes
47
MCC codes
5
HCC V28 codes
3
New FY2027
0

Categories in B50-B64

  • B50

    Plasmodium falciparum malaria

    Chagres fever → B50.9

    • 3 billable codes
    • 2 CC
    • 1 MCC
  • B51

    Plasmodium vivax malaria

    Malaria, malarial (fever)vivax → B51.9

    • 3 billable codes
    • 3 CC
  • B52

    Plasmodium malariae malaria

    Malaria, malarial (fever)malariae → B52.9

    • 3 billable codes
    • 3 CC
  • B53

    Other specified malaria

    Monkey malaria → B53.1

    • 3 billable codes
    • 3 CC
  • B54

    Unspecified malaria

    Malaria, malarial (fever) → B54

    • Billable, no subdivisions
    • 1 CC
  • B55

    Leishmaniasis

    Uta → B55.1

    • 4 billable codes
    • 4 CC
  • B56

    African trypanosomiasis

    Africantrypanosomiasis → B56.9

    • 3 billable codes
    • 3 CC
  • B57

    Chagas' disease

    Chagas' (-Mazza) disease (chronic) → B57.2

    • 12 billable codes
    • 12 CC
  • B58

    Toxoplasmosis

    Toxoplasma, toxoplasmosis (acquired) → B58.9

    • 11 billable codes
    • 8 CC
    • 3 MCC
    • 2 with HCC
  • B59

    Pneumocystosis

    Pneumocystis carinii pneumonia → B59

    • Billable, no subdivisions
    • 1 MCC
    • 1 with HCC
  • B60

    Other protozoal diseases, not elsewhere classified

    Babesiosis → B60.00

    • 12 billable codes
    • 8 CC
  • B64

    Unspecified protozoal disease

    Protozoaldisease → B64

    • Billable, no subdivisions

Index main terms

  • Malaria, malarial (fever) → B50, B51, B52, B53, B54 (34 entries)
  • Infection, infected, infective (opportunistic) → B55, B56, B59, B60, B64 (19 entries)
  • Chagas' (-Mazza) disease (chronic) → B57 (17 entries)
  • Leishmaniasis → B55 (16 entries)
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) → B50, B52, B53, B55 (15 entries)
  • Babesiosis → B60 (9 entries)
  • Trypanosomiasis → B56, B57 (9 entries)
  • Sickness → B56 (8 entries)
  • Disease, diseased → B55, B59, B60, B64 (6 entries)
  • Toxoplasma, toxoplasmosis (acquired) → B58 (6 entries)
  • Acanthamebiasis (with) → B60 (5 entries)
  • Boil → B55 (5 entries)
  • Conjunctivitis (staphylococcal) (streptococcal) NOS → B55, B60 (5 entries)
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) → B58, B59 (5 entries)
  • African → B56 (4 entries)

+65 more main terms; the search box finds them by word.

Block instructions

Excludes1

  • amebiasis (A06.-) A06
  • other protozoal intestinal diseases (A07.-) A07

Notes that also apply

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