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2. ICD-10 Codes
3. Chapter - V00-Y99
4. Section - Y90-Y99
5. Category - Y99
6. Y99.1

Y99.1 - Military activity

• Applicable to Military activity
• The 2025 edition of ICD10-CM Y99.1 became effective on October 1, 2024.
• This is the American ICD10-CM version of Y99.1 - other international versions of ICD10 Y99.1 may differ.
• Y99.1 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

Type 1 Excludes

• activity of off duty military personnel (Y99.8)

The following codes above Y99.1 contain annotation back-references that may be applicable to Y99.1:

• Chapter: V00-Y99 - External causes of morbidity
• Section: Y90-Y99 - Supplementary factors related to causes of morbidity classified elsewhere
• Category: Y99 - External cause status

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.