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  6. 2024 ICD-10-CM Code A74
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code A74

Other diseases caused by chlamydiae

ICD-10-CM Code:
A74
ICD-10 Code for:
Other diseases caused by chlamydiae
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Certain infectious and parasitic diseases
    (A00–B99)
    • Other diseases caused by chlamydiae
      (A70-A74)
      • Other diseases caused by chlamydiae
        (A74)

A74 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other diseases caused by chlamydiae. 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 Other diseases caused by chlamydiae

Non-specific codes like A74 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 other diseases caused by chlamydiae:

  • Use A74.0 for Chlamydial conjunctivitis - BILLABLE CODE

  • A74.8 for Other chlamydial diseases - NON-BILLABLE CODE

  • Use A74.81 for Chlamydial peritonitis - BILLABLE CODE

  • Use A74.89 for Other chlamydial diseases - BILLABLE CODE

  • Use A74.9 for Chlamydial infection, unspecified - BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • neonatal chlamydial conjunctivitis P39.1
  • neonatal chlamydial pneumonia P23.1
  • Reiter's disease M02.3
  • sexually transmitted chlamydial diseases A55 A56

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • chlamydial pneumonia J16.0

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


[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.