A43 - Nocardiosis

Version 2023
ICD-10:A43
Short Description:Nocardiosis
Long Description:Nocardiosis
Status: Not Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • Certain infectious and parasitic diseases (A00–B99)
    • Other bacterial diseases (A30-A49)
      • Nocardiosis (A43)

A43 is a non-specific and non-billable ICD-10 code code, consider using a code with a higher level of specificity for a diagnosis of nocardiosis. The code is not specific and is NOT valid for the year 2023 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 for Nocardiosis

Non-specific codes like A43 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for nocardiosis:

  • BILLABLE CODE - Use A43.0 for Pulmonary nocardiosis
  • BILLABLE CODE - Use A43.1 for Cutaneous nocardiosis
  • BILLABLE CODE - Use A43.8 for Other forms of nocardiosis
  • BILLABLE CODE - Use A43.9 for Nocardiosis, unspecified

Patient Education


Bacterial Infections

Bacteria are living things that have only one cell. Under a microscope, they look like balls, rods, or spirals. They are so small that a line of 1,000 could fit across a pencil eraser. Most types of don't make you sick. Many types are helpful. Some of them help to digest food, destroy disease-causing cells, and give the body needed vitamins. Bacteria are also used in making healthy foods like yogurt and cheese.

But infectious bacteria can make you ill. They reproduce quickly in your body. Many give off chemicals called toxins, which can damage tissue and make you sick. Examples of bacteria that cause infections include Streptococcus, Staphylococcus, and E. coli.

Antibiotics are the usual treatment. When you take antibiotics, follow the directions carefully. Each time you take antibiotics, you increase the chances that bacteria in your body will learn to resist them causing antibiotic resistance. Later, you could get or spread an infection that those antibiotics cannot cure.

NIH: National Institute of Allergy and Infectious Diseases


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Code History