DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

B50 Plasmodium falciparum malaria

  • Header · not billable

B50 is not billable. The category heads 3 billable codes in FY2027: the 3 codes directly below it.

Index → code

  • Chagres fever → B50.9
  • West African fever → B50.8
  • Estivo-autumnal malaria (fever) → B50.9

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. B50-B64 Protozoal diseases (B50-B64)
  3. B50 Plasmodium falciparum malaria
Billable codes
3
Subdivisions
3
CC / MCC codes
2 / 1
HCC V28 codes
0
New FY2027
0
Index entries
30

Codes in B50

  1. B50.0
    Plasmodium falciparum malaria with cerebral complications
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Cerebral malaria NOS
  2. B50.8
    Other severe and complicated Plasmodium falciparum malaria
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Severe or complicated Plasmodium falciparum malaria NOS
  3. B50.9
    Plasmodium falciparum malaria, unspecified
    BillableMCC

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 B50

Includes

  • mixed infections of Plasmodium falciparum with any other Plasmodium species

Notes that also apply

Block B50-B64 instructions (Excludes1 2): printed on the block page.

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

Index entries

  • West African fever → B50.8
  • Chagres fever → B50.9
  • Estivo-autumnal malaria (fever) → B50.9
  • Malaria, malarial (fever)cerebral → B50.0 [G94]
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)bilious, hemoglobinuric → B50.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)blackwater → B50.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)hematuric, bilious → B50.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)hemoglobinuric (malarial) (bilious) → B50.8
  • Hematinuriamalarial → B50.8
  • Hematuriamalarial → B50.8
  • Hemoglobinuriamalarial → B50.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Chagres → B50.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)continued malarial → B50.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)estivo-autumnal (malarial) → B50.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Panama (malarial) → B50.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)subtertian → B50.9
  • Malaria, malarial (fever)algid → B50.9
  • Malaria, malarial (fever)continued (fever) → B50.9
  • Malaria, malarial (fever)estivo-autumnal → B50.9
  • Malaria, malarial (fever)falciparum → B50.9
  • Malaria, malarial (fever)tropical → B50.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)WestAfrican → B50.8
  • Malaria, malarial (fever)withblackwater fever → B50.8
  • Malaria, malarial (fever)withhemoglobinuria → B50.8
  • Malaria, malarial (fever)falciparumwith complications NEC → B50.8
  • Malaria, malarial (fever)falciparumsevere → B50.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)intermittent (bilious)pernicious → B50.9
  • Malaria, malarial (fever)tertian (benign)malignant → B50.9
  • Malaria, malarial (fever)falciparumwith complications NECcerebral → B50.0 [G94]
  • Malaria, malarial (fever)withblackwater feverhemoglobinuric (bilious) → B50.8

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

Hierarchy