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  6. 2024 ICD-10-CM Code B45
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code B45

Cryptococcosis

ICD-10-CM Code:
B45
ICD-10 Code for:
Cryptococcosis
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

B45 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of cryptococcosis. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Cryptococcosis

Non-specific codes like B45 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for cryptococcosis:

  • Use B45.0 for Pulmonary cryptococcosis - BILLABLE CODE

  • Use B45.1 for Cerebral cryptococcosis - BILLABLE CODE

  • Use B45.2 for Cutaneous cryptococcosis - BILLABLE CODE

  • Use B45.3 for Osseous cryptococcosis - BILLABLE CODE

  • Use B45.7 for Disseminated cryptococcosis - BILLABLE CODE

  • Use B45.8 for Other forms of cryptococcosis - BILLABLE CODE

  • Use B45.9 for Cryptococcosis, unspecified - BILLABLE CODE

Clinical Information

  • Cryptococcosis

    fungal infection caused by genus cryptococcus.

  • 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)

  • Cryptococcus

    a mitosporic tremellales fungal genus whose species usually have a capsule and do not form pseudomycellium. teleomorphs include filobasidiella and fidobasidium.

  • Cryptococcosis

    an acute or chronic, localized or disseminated infection by cryptococcus neoformans. sites of involvement include the lungs, central nervous system and meninges, skin, and visceral organs.--2004

Patient Education


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 in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.