Y99.1Billable
Military activity
- Chapter
- 20. External causes of morbidity
- Category
- Y99
- Effective date
- October 1, 2026
Related codes in category Y99
Frequently asked questions
What is ICD-10 code Y99.1?
Y99.1 is an ICD-10-CM diagnosis code for Military activity.
Is Y99.1 a billable code?
Yes. Y99.1 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is Y99.1 in?
Y99.1 falls under Chapter 20: External causes of morbidity.
When did Y99.1 become effective?
Y99.1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to Y99.1?
Y99.1 belongs to category Y99, which includes 5 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.