H01.021 Squamous blepharitis right upper eyelid

Billable ICD-10-CM code, FY2026.

Applies from H01.0 Blepharitis

Excludes1 (never code together)

• blepharoconjunctivitis (H10.5-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 373.02 Squamous blepharitis (approximate)

Diagnosis Index entries for H01.021

• Blepharitis (angularis) (ciliaris) (eyelid) (marginal) (nonulcerative) › squamous › right › upper

Nearby codes

• H01.016 Ulcerative blepharitis left eye, unspecified eyelid
• H01.019 Ulcerative blepharitis unspecified eye, unspecified eyelid
• H01.01A Ulcerative blepharitis right eye, upper and lower eyelids
• H01.01B Ulcerative blepharitis left eye, upper and lower eyelids
• H01.02 Squamous blepharitis
• H01.021 Squamous blepharitis right upper eyelid (this code)
• H01.022 Squamous blepharitis right lower eyelid
• H01.023 Squamous blepharitis right eye, unspecified eyelid
• H01.024 Squamous blepharitis left upper eyelid
• H01.025 Squamous blepharitis left lower eyelid
• H01.026 Squamous blepharitis left eye, unspecified eyelid