H00.025 Hordeolum internum left lower eyelid

The ICD-10-CM code for Hordeolum internum left lower eyelid is H00.025 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

7: Diseases of the eye and adnexa (H00-H59)

Section

H00-H05: Disorders of eyelid, lacrimal system and orbit (H00-H05)

Category H00

34 codes (28 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to H00.025:

• Hordeolum (eyelid) (externum) (recurrent) › internum › left › lower

U.S. Hospital Utilization

• An estimated 120 U.S. inpatient stays in 2018 included H00.025 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 7 TOC entry

7. Chapter 7: Diseases of the Eye and Adnexa (H00-H59) ........................................................ 48

Glaucoma (TOC entry)

a. Glaucoma .............................................................................................................................. 48

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)