ICD-10-CM Code B49

Unspecified mycosis

Version 2020 Billable Code

Valid for Submission

B49 is a billable code used to specify a medical diagnosis of unspecified mycosis. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code B49 might also be used to specify conditions or terms like acute fungal tubulointerstitial nephritis, acute infectious tubulointerstitial nephritis, acute interstitial nephritis, acute pyelonephritis, acute sinusitis caused by fungus, allergic bronchopulmonary mycosis, etc

Short Description:Unspecified mycosis
Long Description:Unspecified mycosis

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code B49:

Inclusion Terms

Inclusion Terms
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.
  • Fungemia NOS

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code B49 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acute fungal tubulointerstitial nephritis
  • Acute infectious tubulointerstitial nephritis
  • Acute interstitial nephritis
  • Acute pyelonephritis
  • Acute sinusitis caused by fungus
  • Allergic bronchopulmonary mycosis
  • Allergic fungal sinusitis
  • Arthropathy associated with a mycosis
  • Arthropathy associated with mycoses, of multiple sites
  • Arthropathy associated with mycoses, of the ankle and/or foot
  • Arthropathy associated with mycoses, of the hand
  • Arthropathy associated with mycoses, of the pelvic region and thigh
  • Arthropathy associated with mycoses, of the shoulder region
  • Candida sake or Candida famata or Yarrowia lipolytica
  • Chronic catarrhal rhinitis
  • Deep mycosis
  • Deep mycosis
  • Dilated cardiomyopathy secondary to fungal myocarditis
  • Dilated cardiomyopathy secondary to infection
  • Duodenal ulcer caused by fungus
  • Fetus or newborn infection caused by fungus
  • Fungal arthritis
  • Fungal cardiovascular infection
  • Fungal chorioretinitis
  • Fungal choroiditis
  • Fungal conjunctivitis
  • Fungal ear infection
  • Fungal encephalitis
  • Fungal endophthalmitis
  • Fungal enteritis
  • Fungal esophagitis
  • Fungal gastroenteritis
  • Fungal gastrointestinal infection
  • Fungal granuloma
  • Fungal infection associated with peritoneal dialysis catheter
  • Fungal infection by site
  • Fungal infection of brain
  • Fungal infection of central nervous system
  • Fungal infection of cerebrum
  • Fungal infection of eye
  • Fungal infection of kidney
  • Fungal infection of lung
  • Fungal keratitis
  • Fungal keratitis
  • Fungal keratitis
  • Fungal meningitis
  • Fungal musculoskeletal infection
  • Fungal myocarditis
  • Fungal myositis
  • Fungal peritonitis
  • Fungal pneumonia
  • Fungal respiratory infection
  • Fungal sinusitis
  • Fungal sinusitis
  • Fungal ventriculitis
  • Fungemia
  • Fungus isolated but not further identified
  • Gastric ulcer caused by fungus
  • Gastritis caused by fungus
  • Gingival erythema
  • Granuloma of intracranial structure caused by fungus
  • Infection associated with peritoneal dialysis catheter
  • Infection causing myelitis
  • Infection due to resistant fungi
  • Infection of lacrimal gland
  • Infection of lacrimal gland caused by fungus
  • Infection of upper respiratory tract caused by fungus
  • Infectious endophthalmitis
  • Infective esophagitis
  • Infective ventriculitis
  • Invasive fungal infection
  • Invasive fungal infection
  • Invasive fungal sinusitis
  • Keratitis of left eye caused by fungus
  • Keratitis of right eye caused by fungus
  • Linear gingival erythema
  • Linear gingival erythema caused by fungus
  • Mold isolated but not further identified
  • Mycosis
  • Mycotic pericarditis
  • Myelitis caused by fungus
  • Neonatal fungal infection of skin
  • Neonatal skin infection
  • Opportunistic infectious disease
  • Opportunistic mycosis
  • Opportunistic mycosis co-occurrent with human immunodeficiency virus infection
  • Oral mucosal fungal disease
  • Pichia kudriavzevii or Candida inconspicua
  • Pichia kudriavzevii or Candida inconspicua or Candida lambica
  • Pneumonia in systemic mycosis
  • Postinfective arthropathy caused by fungus
  • Rhinitis caseosa
  • Sepsis due to fungus
  • Suppurative arthritis due to fungus
  • Systemic mycosis
  • Unidentified isolate
  • Ventriculitis of the brain
  • Yeast isolated but not further identified

Clinical Information

  • MYCOSIS FUNGOIDES-. a chronic malignant t cell lymphoma of the skin. in the late stages the lymph nodes and viscera are affected.
  • EYE INFECTIONS FUNGAL-. infection by a variety of fungi usually through four possible mechanisms: superficial infection producing conjunctivitis keratitis or lacrimal obstruction; extension of infection from neighboring structures skin paranasal sinuses nasopharynx; direct introduction during surgery or accidental penetrating trauma; or via the blood or lymphatic routes in patients with underlying mycoses.
  • INVASIVE PULMONARY ASPERGILLOSIS-. lung infections with the invasive forms of aspergillus usually after surgery transplantation prolonged neutropenia or treatment with high doses of corticosteroids. invasive pulmonary aspergillosis can progress to chronic necrotizing pulmonary aspergillosis or hematogenous spread to other organs.

Diagnostic Related Groups

The ICD-10 code B49 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert B49 to ICD-9

  • 117.9 - Mycoses NEC & NOS (Approximate Flag)

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients

Fungal Infections

If you have ever had athlete's foot or a yeast infection, you can blame a fungus. A fungus is a primitive organism. Mushrooms, mold and mildew are examples. Fungi live in air, in soil, on plants and in water. Some live in the human body. Only about half of all types of fungi are harmful.

Some fungi reproduce through tiny spores in the air. You can inhale the spores or they can land on you. As a result, fungal infections often start in the lungs or on the skin. You are more likely to get a fungal infection if you have a weakened immune system or take antibiotics.

Fungi can be difficult to kill. For skin and nail infections, you can apply medicine directly to the infected area. Oral antifungal medicines are also available for serious infections.

[Learn More]