ICD-10-CM Code B45.9

Cryptococcosis, unspecified

Version 2020 Billable Code

Valid for Submission

B45.9 is a billable code used to specify a medical diagnosis of cryptococcosis, unspecified. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code B45.9 might also be used to specify conditions or terms like cryptococcosis or cryptococcosis associated with aids or cryptococcus gattii infection.

Short Description:Cryptococcosis, unspecified
Long Description:Cryptococcosis, unspecified

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 B45.9 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:

  • Cryptococcosis
  • Cryptococcosis associated with AIDS
  • Cryptococcus gattii infection

Clinical Information

  • CRYPTOCOCCOSIS-. infection with a fungus of the species cryptococcus neoformans.
  • MENINGITIS CRYPTOCOCCAL-. meningeal inflammation produced by cryptococcus neoformans an encapsulated yeast that tends to infect individuals with acquired immunodeficiency syndrome and other immunocompromised states. the organism enters the body through the respiratory tract but symptomatic infections are usually limited to the lungs and nervous system. the organism may also produce parenchymal brain lesions torulomas. clinically the course is subacute and may feature headache; nausea; photophobia; focal neurologic deficits; seizures; cranial neuropathies; and hydrocephalus. from adams et al. principles of neurology 6th ed pp721 2

Convert B45.9 to ICD-9

  • 117.5 - Cryptococcosis (Approximate Flag)

Code Classification

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.

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