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  6. 2024 ICD-10-CM Code Y99
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code Y99

External cause status

ICD-10-CM Code:
Y99
ICD-10 Code for:
External cause status
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • External causes of morbidity and mortality
    (V01–Y99)
    • Supplementary factors related to causes of morbidity classified elsewhere
      (Y90-Y99)
      • External cause status
        (Y99)

Y99 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of external cause status. 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 External cause status

Non-specific codes like Y99 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 external cause status:

  • Use Y99.0 for Civilian activity done for income or pay - BILLABLE CODE

  • Use Y99.1 for Military activity - BILLABLE CODE

  • Use Y99.2 for Volunteer activity - BILLABLE CODE

  • Use Y99.8 for Other external cause status - BILLABLE CODE

  • Use Y99.9 for Unspecified external cause status - 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.


  • A single code from category Y99 should be used in conjunction with the external cause codes assigned to a record to indicate the status of the person at the time the event occurred.

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.