DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

B77 Ascariasis

  • Header · not billable

B77 is not billable. The category heads 4 billable codes in FY2027, grouped under 3 subdivisions.

Index → code

  • Ascariasis → B77.9
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)Ascaris → B77.81
  • Ascariasiswithcomplications NEC → B77.89

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. B65-B83 Helminthiases (B65-B83)
  3. B77 Ascariasis
Billable codes
4
Subdivisions
3
CC / MCC codes
3 / 1
HCC V28 codes
0
New FY2027
0
Index entries
9

Codes in B77

  1. B77.0
    Ascariasis with intestinal complications
    BillableCC
  2. B77.8
    Ascariasis with other complications
    Header
  3. B77.81
    Ascariasis pneumonia
    BillableMCC
  4. B77.89
    Ascariasis with other complications
    BillableCC
  5. B77.9
    Ascariasis, unspecified
    BillableCC

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 B77

Includes

  • ascaridiasis
  • roundworm infection

Notes that also apply

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

Index entries

  • Ascariasis → B77.9
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)Ascaris → B77.81
  • Ascariasiswithintestinal complications → B77.0
  • Ascariasiswithpneumonia, pneumonitis → B77.81
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)in (due to)ascariasis → B77.81
  • Ascariasiswithcomplications NEC → B77.89
  • Infection, infected, infective (opportunistic)roundworm (large) NECAscariasis → B77.9
  • Infestationroundworm (large) NECAscariasis → B77.9
  • Roundworms (large) (infestation) NECAscariasis → B77.9

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

Hierarchy