2027 ICD-10-CM Diagnosis Code B37.9Candidiasis, unspecified

ICD-10-CM Codes›A00–B99›B35-B49›B37

ICD-10-CM B37.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

B37.9 is a billable ICD-10-CM diagnosis code for candidiasis, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 867 through 869, 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections.

Code Identity

ICD-10-CM Code
B37.9
Billable Status
Yes — Valid for Submission
Code Describes
Candidiasis, unspecified
Short Description
Candidiasis, unspecified
Same as the full description in the CMS dataset.
Parent Code
B37
Candidiasis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB37Candidiasis
This CodeB37.9Candidiasis, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Candida albicans or Candida dubliniensis
  • Candida inconspicua or Candida norvegensis
  • Candidiasis
  • Chronic acquired mucocutaneous candidiasis
  • Chronic diffuse mucocutaneous candidiasis
  • Chronic localized mucocutaneous candidiasis
  • Chronic mucocutaneous candidiasis
  • Familial chronic mucocutaneous candidiasis
  • Familial chronic mucocutaneous candidiasis - dominant type
  • Familial chronic mucocutaneous candidiasis - late onset type
  • Familial chronic mucocutaneous candidiasis - recessive type
  • Infection by Candida albicans
  • Infection caused by Candidozyma auris
  • Invasive candidiasis
  • Localized candidiasis
  • Mucosal candidiasis
  • Recurrent infection caused by Candida
  • Recurrent infection caused by Fungi

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B37.9: its own notes plus those printed at B37, block B35-B49, and Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From B37 Candidiasis applies to 17 codes
  • candidosis
  • moniliasis
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Thrush NOS

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From B37 Candidiasis applies to 17 codes
  • neonatal candidiasis (P37.5)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block B35-B49 Mycoses applies to 104 codes
  • hypersensitivity pneumonitis due to organic dust (J67.-)
  • mycosis fungoides (C84.0-)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR INF004
Fungal infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Candidiasis

    infection with a fungus of the genus candida. it is usually a superficial infection of the moist areas of the body and is generally caused by candida albicans. (dorland, 27th ed)

Patient EducationClinical

Yeast Infections

Candida is the scientific name for yeast. It is a fungus that lives almost everywhere, including in your body. Usually, your immune system keeps yeast under control. If you are sick or taking antibiotics, it can multiply and cause an infection.

Read the full article at MedlinePlus

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

Convert B37.9 to ICD-9-CMHistory

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

ICD-9-CM
112.9 Candidiasis site NOS
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B37.9Overview

What is the ICD-10 code for candidiasis, unspecified?

The ICD-10-CM code for candidiasis, unspecified is B37.9 (sometimes written as B379). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is B37.9 (Candidiasis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report candidiasis, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does B37.9 group to?

When candidiasis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 974, 976, 975, 867, 869, 868, with relative weights from 0.6784 to 3.0488 depending on complications. Higher weights mean higher Medicare reimbursement.

Can B37.9 be reported with P37.5?

Not as a rule. The Excludes1 note at B37, which applies to B37.9, lists "neonatal candidiasis (P37.5)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

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

Under the General Equivalence Mappings, candidiasis, unspecified converts to ICD-9-CM 112.9 (candidiasis site NOS). The mapping is a direct match.