Pneumocystosis digital illustration

Pneumocystosis Save

ICD-10 code: B59

Chapter: Certain infectious and parasitic diseases

Understanding Pneumocystosis: Symptoms, Causes, and Treatment

Pneumocystosis is a type of pneumonia caused by a fungus called Pneumocystis jirovecii. This condition is more common in people with weakened immune systems, such as those with HIV/AIDS, cancer, or those who have undergone an organ transplant. Pneumocystosis can be a life-threatening condition if left untreated, which is why it's important to recognize the symptoms and seek medical attention as soon as possible.

Symptoms of Pneumocystosis

The symptoms of pneumocystosis can vary from person to person, but some common signs include:

  1. Difficulty breathing
  2. Fever
  3. Cough
  4. Rapid breathing
  5. Chills
  6. Sweating at night

If you have any of these symptoms, it's important to see your healthcare provider right away, especially if you have a weakened immune system.

Causes of Pneumocystosis

Pneumocystosis is caused by the fungus Pneumocystis jirovecii. This fungus is found in the environment and can be spread through the air. However, not everyone who is exposed to the fungus will develop pneumocystosis. The risk is higher in people with weakened immune systems, as their bodies are less able to fight off the infection.

Treatment for Pneumocystosis

If you are diagnosed with pneumocystosis, your healthcare provider will likely prescribe medication to treat the infection. The most common treatment is a combination of antibiotics and antifungal medication. It's important to take all of the medication as prescribed, even if you start feeling better before the medication is finished.

In addition to medication, it's important to manage any underlying conditions that may have weakened your immune system. This can include taking medications for HIV/AIDS or cancer, getting regular check-ups, and avoiding exposure to other infections.


Pneumocystosis is a serious condition that can be life-threatening if left untreated. If you have a weakened immune system and are experiencing symptoms such as difficulty breathing, fever, cough, or rapid breathing, it's important to see your healthcare provider right away. With appropriate treatment, most people with pneumocystosis are able to recover fully.

Diagnosis Codes for Pneumocystosis | B59