DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A42 Actinomycosis

  • Header · not billable

A42 is not billable. The category heads 8 billable codes in FY2027, grouped under 6 subdivisions.

Index → code

  • Rivalta's disease → A42.2
  • Actinomycosis, actinomycotic → A42.9
  • Actinomycosis, actinomycoticsepsis → A42.7

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. A30-A49 Other bacterial diseases (A30-A49)
  3. A42 Actinomycosis
Billable codes
8
Subdivisions
6
CC / MCC codes
7 / 1
HCC V28 codes
1
New FY2027
0
Index entries
18

Codes in A42

  1. A42.0
    Pulmonary actinomycosis
    BillableCC
  2. A42.1
    Abdominal actinomycosis
    BillableCC
  3. A42.2
    Cervicofacial actinomycosis
    BillableCC
  4. A42.7
    Actinomycotic sepsis
    BillableMCC2
  5. A42.8
    Other forms of actinomycosis
    Header
  6. A42.81
    Actinomycotic meningitis
    BillableCC
  7. A42.82
    Actinomycotic encephalitis
    BillableCC
  8. A42.89
    Other forms of actinomycosis
    BillableCC
  9. A42.9
    Actinomycosis, 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 A42

Excludes1

  • actinomycetoma (B47.1) B47.1

Notes that also apply

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

Index entries

  • Rivalta's disease → A42.2
  • Actinomycosis, actinomycotic → A42.9
  • Actinomycosis, actinomycoticwith pneumonia → A42.0
  • Actinomycosis, actinomycoticpulmonary → A42.0
  • Actinomycosis, actinomycoticabdominal → A42.1
  • Actinomycosis, actinomycoticgastrointestinal → A42.1
  • Actinomycosis, actinomycoticcervicofacial → A42.2
  • Disease, diseasedRivalta's (cervicofacial actinomycosis) → A42.2
  • Actinomycosis, actinomycoticsepsis → A42.7
  • Sepsis (generalized) (unspecified organism)actinomycotic → A42.7
  • Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)actinomycotic → A42.81
  • Actinomycosis, actinomycoticcutaneous → A42.89
  • Actinomycosis, actinomycoticspecified site NEC → A42.89
  • Canaliculitis (lacrimal) (acute) (subacute)Actinomyces → A42.89
  • Infection, infected, infective (opportunistic)Actinomyces (israelii) → A42.9
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)in (due to)actinomycosis → A42.0
  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute)in (due to)actinomycosis → A42.82
  • Meningoencephalomyelitisdue toactinomycosis → A42.82

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

Hierarchy