1. ICD-10-CM Codes
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2. A00-B99 Certain infectious and parasitic diseases
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3. B35-B49 Mycoses
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4. B49- Unspecified mycosis
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5. 2021 ICD-10-CM Diagnosis Code B49

2021 ICD-10-CM Diagnosis Code B49

Unspecified mycosis

2016 2017 2018 2019 2020 2021 Billable/Specific Code

• B49 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2021 edition of ICD-10-CM B49 became effective on October 1, 2020.
• This is the American ICD-10-CM version of B49 - other international versions of ICD-10 B49 may differ.

• Allergic bronchopulmonary mycosis
• Arthropathy associated with a mycosis
• Arthropathy associated with mycosis
• Arthropathy with mycosis
• Bilateral fungal keratitis
• Fungal endocarditis
• Fungal keratitis
• Fungal meningitis
• Fungal pneumonia
• Fungal sinusitis
• Invasive fungal sinusitis
• Left fungal keratitis
• Meningitis, fungal
• Mycosis
• Mycotic aneurysm
• Mycotic endocarditis
• Pneumonia due to fungus
• Right fungal keratitis

• An infection caused by a fungus.
• An infection caused by eukaryotic heterotrophic organisms that live as saprobes or parasites, including mushrooms, yeasts, smuts, molds, etc. They reproduce either sexually or asexually, and have life cycles that range from simple to complex. Filamentous fungi refer to those that grow as multicellular colonies (mushrooms and molds).
• Disease caused by a fungus.
• If you have ever had athlete's foot or a yeast infection, you can blame a fungus. A fungus is actually a primitive vegetable. 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.
• The presence of fungi circulating in the blood. Opportunistic fungal sepsis is seen most often in immunosuppressed patients with severe neutropenia or in postoperative patients with intravenous catheters and usually follows prolonged antibiotic therapy.

• 867 Other infectious and parasitic diseases diagnoses with mcc
• 868 Other infectious and parasitic diseases diagnoses with cc
• 869 Other infectious and parasitic diseases diagnoses without cc/mcc

Convert B49 to ICD-9-CM

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change

• Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) M19.90
  ICD-10-CM Diagnosis Code M19.90

  Unspecified osteoarthritis, unspecified site

  2016 2017 2018 2019 2020 2021 Billable/Specific Code

  Applicable To

  • Arthrosis NOS
  • Arthritis NOS
  • Osteoarthritis NOS
  • in (due to)
    • mycosis NEC B49 - see also category M01
  • mycotic NEC B49 - see also category M01
• Bronchomycosis NOS B49
• Cough (affected) (chronic) (epidemic) (nervous) R05
  ICD-10-CM Diagnosis Code R05

  Cough

  2016 2017 2018 2019 2020 2021 Billable/Specific Code

  Type 1 Excludes

  • cough with hemorrhage (R04.2)
  • smoker's cough (J41.0)
  • tea taster's B49
• Diarrhea, diarrheal (disease) (infantile) (inflammatory) R19.7
  ICD-10-CM Diagnosis Code R19.7

  Diarrhea, unspecified

  2016 2017 2018 2019 2020 2021 Billable/Specific Code

  Applicable To

  • Diarrhea NOS

  Type 1 Excludes

  • functional diarrhea (K59.1)
  • neonatal diarrhea (P78.3)
  • psychogenic diarrhea (F45.8)
  • mycotic NEC B49
• Disease, diseased - see also Syndrome
  • fungus NEC B49
  • mycotic B49
• Fungemia NOS B49
• Fungus, fungous
  • disease NOS B49
• Infection, infected, infective (opportunistic) B99.9
  ICD-10-CM Diagnosis Code B99.9

  Unspecified infectious disease

  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • fungus NOS B49
  • mycotic NOS B49
  • mycelium NOS B49
• Keratomycosis B49
• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) G03.9
  ICD-10-CM Diagnosis Code G03.9

  Meningitis, unspecified

  2016 2017 2018 2019 2020 2021 Billable/Specific Code

  Applicable To

  • Arachnoiditis (spinal) NOS
  • mycotic NEC B49
• Mycelium infection B49
• Mycosis, mycotic B49
• Myositis M60.9
  ICD-10-CM Diagnosis Code M60.9

  Myositis, unspecified

  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • in (due to)
    • mycosis B49
  • mycotic B49
• Pneumomycosis B49

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.