Y99.1
Y99.1: Military activity
Billable / specific codeICD-10-CMPOA exempt
Y99.1 is a billable, specific ICD-10-CM code for military activity. It is valid for submission on a claim.
Check Y99.1 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- activity of off duty military personnel (Y99.8)
Other codes that can never be billed with Y99.1
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Alphabetic index entries that lead here
- External cause status›military activity
- Status of external cause›military activity
Code history
Unchanged in every release from FY2024 to FY2027.