DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 1

B35-B49 Mycoses (B35-B49)

Block B35-B49 groups 15 categories with 104 billable codes in FY2027.

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. B35-B49 Mycoses (B35-B49)

Neighbouring blocks

Categories
15
Billable codes
104
CC codes
49
MCC codes
18
HCC V28 codes
28
New FY2027
0

Categories in B35-B49

  • B35

    Dermatophytosis

    Ringworm → B35.9

    • 9 billable codes
  • B36

    Other superficial mycoses

    Chromophytosis → B36.0

    • 6 billable codes
  • B37

    Candidiasis

    Soor → B37.0

    • 17 billable codes
    • 8 CC
    • 4 MCC
    • 3 with HCC
  • B38

    Coccidioidomycosis

    Valley fever → B38.0

    • 9 billable codes
    • 8 CC
    • 1 MCC
  • B39

    Histoplasmosis

    Histoplasmosis → B39.9

    • 7 billable codes
    • 1 CC
    • 3 MCC
  • B40

    Blastomycosis

    Chicago disease → B40.9

    • 8 billable codes
    • 8 CC
  • B41

    Paracoccidioidomycosis

    Paracoccidioidomycosis → B41.9

    • 4 billable codes
    • 4 CC
  • B42

    Sporotrichosis

    Sporotrichosis → B42.9

    • 7 billable codes
    • 1 with HCC
  • B43

    Chromomycosis and pheomycotic abscess

    Chromomycosis → B43.9

    • 5 billable codes
  • B44

    Aspergillosis

    Bronchoaspergillosis → B44.1

    • 7 billable codes
    • 6 CC
    • 1 MCC
    • 7 with HCC
  • B45

    Cryptococcosis

    Cryptococcosis, cryptococcus (infection) (neoformans) → B45.9

    • 7 billable codes
    • 6 CC
    • 1 MCC
    • 7 with HCC
  • B46

    Zygomycosis

    Zygomycosis → B46.9

    • 8 billable codes
    • 8 MCC
    • 8 with HCC
  • B47

    Mycetoma

    Mycetoma → B47.9

    • 3 billable codes
    • 3 CC
  • B48

    Other mycoses, not elsewhere classified

    Lobomycosis → B48.0

    • 6 billable codes
    • 4 CC
    • 2 with HCC
  • B49

    Unspecified mycosis

    Fungemia NOS → B49

    • Billable, no subdivisions
    • 1 CC

Index main terms

  • Infection, infected, infective (opportunistic) → B35, B36, B37, B39, B40, B43, B46, B47, B48, B49 (76 entries)
  • Candidiasis, candidal → B37 (37 entries)
  • Tinea (intersecta) (tarsi) → B35, B36 (23 entries)
  • Dermatophytosis (epidermophyton) (infection) (Microsporum) (tinea) (Trichophyton) → B35 (15 entries)
  • Ringworm → B35 (15 entries)
  • Mycosis, mycotic → B35, B36, B37, B44, B48, B49 (14 entries)
  • Disease, diseased → B35, B36, B37, B38, B40, B48, B49 (13 entries)
  • Blastomycosis, blastomycotic → B40, B48 (12 entries)
  • Cryptococcosis, cryptococcus (infection) (neoformans) → B45 (12 entries)
  • Histoplasmosis → B39 (12 entries)
  • Mycetoma → B47 (12 entries)
  • Coccidioidomycosis → B38 (11 entries)
  • Otitis (acute) → B36, B37, B44 (11 entries)
  • Aspergillosis (with pneumonia) → B44 (9 entries)
  • Granuloma → B35, B37, B38, B41 (9 entries)

+116 more main terms; the search box finds them by word.

Block instructions

Excludes2

  • hypersensitivity pneumonitis due to organic dust (J67.-) J67
  • mycosis fungoides (C84.0-) C84.0

Notes that also apply

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