H00.021 Hordeolum internum right upper eyelid

Billable ICD-10-CM code, FY2026.

Applies from H00.02 Hordeolum internum

Applicable to

• Infection of meibomian gland

MS-DRG index

Defines the logic of DRG(s) 124-125 in MDC 02.

Approximate ICD-9-CM (GEMs)

• 373.12 Hordeolum internum (approximate)

Code annotations containing back-references to H00.021

Back-references to H00.02

• Type 2 Excludes: H00.1 Chalazion ("infected meibomian gland (H00.02-)")

Back-references to H00.0

• Type 2 Excludes: L02.0 Cutaneous abscess, furuncle and carbuncle of face ("abscess of eyelid (H00.0)")
• Type 2 Excludes: L03 Cellulitis and acute lymphangitis ("cellulitis of eyelid (H00.0)")
• Type 2 Excludes: L03.211 Cellulitis of face ("cellulitis of eyelid (H00.0-)")

Diagnosis Index entries for H00.021

• Hordeolum (eyelid) (externum) (recurrent) › internum › right › upper

Nearby codes

• H00.014 Hordeolum externum left upper eyelid
• H00.015 Hordeolum externum left lower eyelid
• H00.016 Hordeolum externum left eye, unspecified eyelid
• H00.019 Hordeolum externum unspecified eye, unspecified eyelid
• H00.02 Hordeolum internum
• H00.021 Hordeolum internum right upper eyelid (this code)
• H00.022 Hordeolum internum right lower eyelid
• H00.023 Hordeolum internum right eye, unspecified eyelid
• H00.024 Hordeolum internum left upper eyelid
• H00.025 Hordeolum internum left lower eyelid
• H00.026 Hordeolum internum left eye, unspecified eyelid