H00Header code — not billable
Hordeolum and chalazion
- Chapter
- 7. Diseases of the eye and adnexa
- Category
- H00
- Effective date
- October 1, 2026
Related codes in category H00
H00.0Hordeolum (externum) (internum) of eyelidH00.01Hordeolum externumH00.011Hordeolum externum right upper eyelidYesH00.012Hordeolum externum right lower eyelidYesH00.013Hordeolum externum right eye, unspecified eyelidYesH00.014Hordeolum externum left upper eyelidYesH00.015Hordeolum externum left lower eyelidYesH00.016Hordeolum externum left eye, unspecified eyelidYesH00.019Hordeolum externum unspecified eye, unspecified eyelidYesH00.02Hordeolum internumH00.021Hordeolum internum right upper eyelidYesH00.022Hordeolum internum right lower eyelidYes
Frequently asked questions
What is ICD-10 code H00?
H00 is an ICD-10-CM diagnosis code for Hordeolum and chalazion.
Is H00 a billable code?
No. H00 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is H00 in?
H00 falls under Chapter 7: Diseases of the eye and adnexa.
When did H00 become effective?
H00 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to H00?
H00 belongs to category H00, which includes 12 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.