Lagophthalmos is a condition in which one or both eyelids cannot fully close, leaving a gap between the upper and lower lids that exposes the ocular surface — most critically the cornea — to the environment during blinking, waking hours, or sleep. The term specifically encompasses nocturnal lagophthalmos (incomplete closure during sleep), which is far more common than widely recognized. Under normal physiology, the blink reflex and full eyelid closure maintain a moist, protected corneal surface. When this protective mechanism fails, the exposed cornea undergoes progressive tear film instability → epithelial breakdown → exposure keratopathy → corneal ulceration, and if untreated, permanent vision loss through corneal scarring or perforation. From a medical-coding perspective, lagophthalmos documentation must clarify: Type (unspecified, cicatricial, mechanical, paralytic) Laterality (right, left, bilateral) Specific eyelid (upper, lower, or both) Underlying etiology (Bell’s palsy, post-blepharoplasty, cicatrix, exophthalmos, leprosy) Complications (exposure keratopathy, corneal ulcer, epiphora) Treatment (conservative vs. surgical: tarsorrhaphy, gold weight, canthoplasty)
These distinctions are essential because the ICD-10-CM H02.2- subcategory has multiple type-specific and laterality-specific subsets with alpha-character extensions for bilateral upper-and-lower presentations, and the CPT code for gold weight implantation is specialty-specific and audited closely. The term derives from the ancient Greek lagos (hare) + ophthalmos (eye) — because the hare was believed by ancient Greeks to sleep with its eyes open.
greek - The word derives entirely from ancient Greek roots:
lago-: From Greek lagōs (λαγώς) or lagos (λαγός), meaning “hare” — the European hare was famously (and erroneously) believed by ancient Greeks and Romans to sleep with its eyes open; this observation gave rise to the term; the hare’s apparent open-eyed resting posture inspired the anatomical metaphor
lagophthalmos literally means “hare eye” — an eye that, like the mythologized hare, appears perpetually open
Note: The historical term “hare eye” (Hasenauge in German ophthalmological literature) was used well into the 19th century as a synonym. The misconception about hares sleeping with open eyes was noted by Pliny the Elder (23-79 AD) in Naturalis Historia. Despite the zoological myth, the anatomical analogy proved clinically useful and the eponymous Greek term persisted into modern medicine.
Temporary tarsorrhaphy (67880): Partial surgical adhesion of lid margins; reversible; buys time while nerve recovers
Permanent tarsorrhaphy (67882): Full or extended margin adhesion; for permanent paralysis
Gold weight implant (67912): Platinum or 24-karat gold lid weight sewn into pocket in upper lid tissue; gravity pulls lid closed; reversible; gold-standard for paralytic lagophthalmos
Platinum weight (coded identically to gold weight — 67912): Platinum is denser, so smaller implant needed; preferred by some surgeons for thinner lids
Lower lid tightening / canthoplasty (67950): Tightens lower lid to improve apposition; often combined with gold weight
Ectropion repair (67917): When paralytic ectropion coexists and contributes to exposure; G51.0 sequences first
Documentation Clues for Coders
Look for phrases such as:
“Unable to fully close eyelid(s)”
“Lagophthalmos — X mm gap on attempted closure”
“Inferior corneal exposure / staining”
“Nocturnal lagophthalmos” (physiologic type)
“Post-blepharoplasty lagophthalmos” (→ cicatricial type — H02.21-)
“CN VII palsy with lagophthalmos” (→ G51.0 first; H02.22- second)
“Gold weight implanted in upper lid” (→ CPT 67912)
“Tarsorrhaphy performed” (→ 67880 temporary or 67882 permanent)
“Corneal ulcer secondary to lagophthalmos” (→ add H16.0- series)
“Right/left/bilateral upper and lower eyelids” (→ alpha extension codes H02.20A/B/C)
These help determine lagophthalmos type, laterality and eyelid specificity, underlying etiology sequencing, and CPT code selection for the corrective procedure.
Coder’s Notes
H02.2- has a unique alpha-character extension system: Beyond the standard 1-6 digit codes for individual lids, ICD-10-CM added alpha extensions A (right eye, upper and lower lids), B (left eye, upper and lower lids), and C (bilateral, upper and lower lids) — use these when documentation states both upper and lower lids of one or both eyes are affected; do NOT use H02.20 (unspecified) when lid specificity is documented
H02.23- = Paralytic (Bell’s palsy, CN VII palsy, stroke)
Sequencing for paralytic lagophthalmos: When secondary to Bell’s palsy, G51.0 sequences FIRST as the underlying cause; H02.23- sequences second as the manifestation — reversing this order is a sequencing error
67912 gold weight implant: This CPT code covers both gold and platinum eyelid weight implants; there is no separate CPT for platinum — both are billed under 67912; the operative report should specify the material and weight (grams) for documentation completeness
Congenital lagophthalmos Excludes1: Congenital eyelid malformations (Q10.0-Q10.3) are hard Excludes1 from H02.- — do NOT code H02.2- for congenital presentations; use appropriate Q10.- code
Eyelid modifiers E1-E4 may be required on CPT codes 67880, 67882, and 67912 by certain payers — verify payer-specific requirements:
E1 = upper left | E2 = lower left | E3 = upper right | E4 = lower right
Gold weight implant + ectropion repair same session: When 67912 (gold weight) and 67917 (ectropion repair) are performed together for paralytic lagophthalmos with paralytic ectropion — both CPT codes are billable on the same claim with modifier 51 on the secondary procedure; document each procedure separately in the operative note
ICU/inpatient lagophthalmos: In critically ill patients, lagophthalmos is a common secondary complication; for inpatient profee coding, ensure POA = Y and code the ocular complications (H16.23- exposure keratopathy) additionally to support ophthalmology consultation medical necessity
Global period for 67912: Gold weight implantation carries a 90-day global period — subsequent visits to assess lid closure and remove/adjust the weight during the global period are included unless the visit is unrelated (modifier 24) or the removal requires a separate surgical procedure
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