2026 ICD-10-CM Diagnosis Code B37.84Candidal otitis externa

ICD-10-CM Codes›A00–B99›B35-B49›B37

ICD-10-CM B37.84
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B37.84 is a billable ICD-10-CM diagnosis code for candidal otitis externa. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 154 through 156, 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections and Other specified and unspecified disorders of the ear.

Code Identity

ICD-10-CM Code
B37.84
Billable Status
Yes — Valid for Submission
Code Describes
Candidal otitis externa
Short Description
Candidal otitis externa
Same as the full description in the CMS dataset.
Parent Code
B37.8
Candidiasis of other sites

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB37Candidiasis
This CodeB37.84Candidal otitis externa

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral otitis externa of external auditory canals caused by fungus
  • Candidal otitis externa
  • Chronic mycotic otitis externa
  • Chronic otitis externa due to moniliasis
  • Infective otitis externa of bilateral ears
  • Otitis externa of bilateral external auditory canals caused by Candida species
  • Otitis externa of left external auditory canal caused by Candida species
  • Otitis externa of left external auditory canal caused by fungus
  • Otitis externa of right external auditory canal caused by Candida species
  • Otitis externa of right external auditory canal caused by fungus

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Candidiasis, candidal
      • otitis externa
    • Ear
      • tropical NEC
        • in
          • candidiasis
    • Ear
      • tropical NEC
        • in
          • moniliasis
    • Mycosis, mycotic
      • ear
        • in
          • candidiasis
    • Mycosis, mycotic
      • ear
        • in
          • moniliasis
    • Otitis(acute)
      • externa
        • in (due to)
          • candidiasis
    • Otitis(acute)
      • externa
        • mycotic NEC
          • in
            • candidiasis
    • Otitis(acute)
      • externa
        • mycotic NEC
          • in
            • moniliasis
    • Otitis(acute)
      • externa
        • tropical NEC
          • in
            • candidiasis
    • Otitis(acute)
      • externa
        • tropical NEC
          • in
            • moniliasis
    • Otomycosis(diffuse) NEC
      • in
        • candidiasis
    • Otomycosis(diffuse) NEC
      • in
        • moniliasis

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF004
Fungal infections
Default principal diagnosis: inpatient No · outpatient No
CCSR EAR006
Other specified and unspecified disorders of the ear
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Ear Infections

Ear infections are the most common reason parents bring their child to a doctor. Three out of four children will have at least one ear infection by their third birthday. Adults can also get ear infections, but they are less common.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert B37.84 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
112.82 Candidal otitis externa
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B37.84Overview

Is B37.84 (Candidiasis of other sites) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report candidal otitis externa on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B37.84 group to?

When candidal otitis externa is the principal diagnosis on an inpatient stay, it groups to MS-DRG 154, 155, 156, 974, 975, 976, with relative weights from 0.6911 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B37.84?

Under the General Equivalence Mappings, candidal otitis externa converts to ICD-9-CM 112.82 (candidal otitis externa). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.