DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

B40 Blastomycosis

  • Header · not billable

B40 is not billable. The category heads 8 billable codes in FY2027, grouped under 7 subdivisions.

Index → code

  • Chicago disease → B40.9
  • Gilchrist's disease → B40.9
  • Blastomycosis, blastomycotic → B40.9

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. B35-B49 Mycoses (B35-B49)
  3. B40 Blastomycosis
Billable codes
8
Subdivisions
7
CC / MCC codes
8 / 0
HCC V28 codes
0
New FY2027
0
Index entries
19

Codes in B40

  1. B40.0
    Acute pulmonary blastomycosis
    BillableCC
  2. B40.1
    Chronic pulmonary blastomycosis
    BillableCC
  3. B40.2
    Pulmonary blastomycosis, unspecified
    BillableCC
  4. B40.3
    Cutaneous blastomycosis
    BillableCC
  5. B40.7
    Disseminated blastomycosis
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Generalized blastomycosis
  6. B40.8
    Other forms of blastomycosis
    Header
  7. B40.81
    Blastomycotic meningoencephalitis
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Meningomyelitis due to blastomycosis
  8. B40.89
    Other forms of blastomycosis
    BillableCC
  9. B40.9
    Blastomycosis, 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 B40

Excludes1

  • Brazilian blastomycosis (B41.-) B41
  • keloidal blastomycosis (B48.0) B48.0

Notes that also apply

Block B35-B49 instructions (Excludes2 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

  • Blastomycosis, blastomycotic → B40.9
  • Chicago disease → B40.9
  • Gilchrist's disease → B40.9
  • North American blastomycosis → B40.9
  • Blastomycosis, blastomycoticprimary pulmonary → B40.0
  • Blastomycosis, blastomycoticpulmonary → B40.2
  • Blastomycosis, blastomycoticcutaneous → B40.3
  • Blastomycosis, blastomycoticskin → B40.3
  • Dermatitis (eczematous)blastomycotic → B40.3
  • Blastomycosis, blastomycoticdisseminated → B40.7
  • Blastomycosis, blastomycoticgeneralized → B40.7
  • Meningomyelitisblastomycotic NEC → B40.81
  • Blastomycosis, blastomycoticspecified NEC → B40.89
  • Blastomycosis, blastomycoticNorth American → B40.9
  • Disease, diseasedChicago → B40.9
  • Blastomycosis, blastomycoticpulmonaryacute → B40.0
  • Blastomycosis, blastomycoticpulmonarychronic → B40.1
  • Meningoencephalitisin (due to)blastomycosis NEC → B40.81
  • Infection, infected, infective (opportunistic)Blastomyces, blastomycoticNorth American → B40.9

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

Hierarchy