DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

B51 Plasmodium vivax malaria

  • Header · not billable

B51 is not billable. The category heads 3 billable codes in FY2027: the 3 codes directly below it.

Index → code

  • Malaria, malarial (fever)vivax → B51.9
  • Malaria, malarial (fever)Plasmodium (P.)vivax NEC → B51.9
  • Rupture, rupturedspleen (traumatic)due to P. vivax malaria → B51.0

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. B50-B64 Protozoal diseases (B50-B64)
  3. B51 Plasmodium vivax malaria
Billable codes
3
Subdivisions
3
CC / MCC codes
3 / 0
HCC V28 codes
0
New FY2027
0
Index entries
5

Codes in B51

  1. B51.0
    Plasmodium vivax malaria with rupture of spleen
    BillableCC
  2. B51.8
    Plasmodium vivax malaria with other complications
    BillableCC
  3. B51.9
    Plasmodium vivax malaria without complication
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Plasmodium vivax malaria NOS

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 B51

Includes

  • mixed infections of Plasmodium vivax with other Plasmodium species, except Plasmodium falciparum

Excludes1

  • plasmodium vivax with Plasmodium falciparum (B50.-) B50

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

  • Malaria, malarial (fever)vivax → B51.9
  • Rupture, rupturedspleen (traumatic)due to P. vivax malaria → B51.0
  • Malaria, malarial (fever)Plasmodium (P.)vivax NEC → B51.9
  • Malaria, malarial (fever)vivaxwithruptured spleen → B51.0
  • Malaria, malarial (fever)vivaxwithcomplications NEC → B51.8

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

Hierarchy