ICD-10-CM Tabular Index · Chapter 1 · FY 2027 B35–B49
Mycoses (B35-B49) ICD-10-CM
The B35–B49 section covers mycoses with 125 ICD-10-CM diagnosis codes, of which 104 are billable in fiscal year 2027. The section is organized into the 15 code ranges listed below.
✓ Built from the official CMS FY 2027 datasetEffective Oct 1, 2026 – Sep 30, 2027
15
Code Ranges
125
Diagnosis Codes
104
Billable Codes
B35–B49
Code Range
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
hypersensitivity pneumonitis due to organic dust J67
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the B35–B49 Code Range
Mycoses are fungal infections. This block includes infections of skin and nails, as well as infections identified in the lungs, brain and other sites.
The categories separate named infections. B35 covers dermatophytosis, with subdivisions for the affected body site. Tinea is a fungal infection of hair, skin or nails. B36 groups other superficial mycoses, while B37 divides candidiasis by site and form of infection.
Later categories name infections such as coccidioidomycosis, histoplasmosis, aspergillosis and cryptococcosis. Their subdivisions distinguish features shown in the titles, including body site, acute or chronic lung infection, and disseminated infection. B47 separates named forms of mycetoma; B48 groups other specified mycoses; and B49 is unspecified mycosis.
Questions About This Page
How many codes are in the B35-B49 range?
The B35-B49 range contains 125 ICD-10-CM diagnosis codes in FY 2027. 104 of them are billable, and the rest are category headers that organize the section.
What conditions does B35-B49 cover?
The range covers mycoses. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
candidosis
moniliasis
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
