Ectropion is an outward turning or eversion of the eyelid margin — most commonly the lower eyelid — in which the lid sags away from the globe, exposing the inner palpebral conjunctiva to the environment. This loss of apposition between the lid and globe leads to chronic ocular exposure, inadequate tear drainage, epiphora, keratitis, corneal ulceration, and in severe cases, permanent vision loss. It is the direct anatomical opposite of entropion (inward turning of the lid). From a medical-coding perspective, ectropion documentation must clarify: Type (involutional/senile, cicatricial, paralytic, spastic, mechanical, congenital) Laterality (right, left, bilateral) Eyelid (upper vs. lower; lower is by far most common) Surgical method (suture, thermocauterization, tarsal wedge excision, extensive repair)
These distinctions affect both ICD-10-CM code and CPT selection, including the required eyelid modifier (E1-E4). Note that cervical ectropion is an entirely unrelated gynecological condition (eversion of endocervical columnar epithelium onto the ectocervix) — the two share only the name. The term derives from Greek roots meaning “a turning outward.”
Note: The term mirrors entropion in structure — en- (inward) vs. ec- (outward) + tropion (turning). Both entered clinical ophthalmology literature in the 19th century. The Greek tropē root also underlies entropy, tropism, and the directional suffix -trope.
Visible outward sagging of lower lid away from the globe
Treatment
Lubricating drops and ointment to protect corneal surface temporarily
Taping the lower lid toward the cheek — temporary measure
Suture repair (67914): Quickert-type sutures to evert and reappose the lid temporarily
Thermocauterization (67915): Heat shrinks and stiffens the posterior lamella to restore lid position
Tarsal wedge excision (67916): Resection of a wedge of the tarsal plate
Extensive repair (67917): Lateral tarsal strip, Kuhnt-Szymanowski procedure, or full lower lid retractor reinsertion with horizontal tightening; most common definitive repair for involutional ectropion
Cicatricial ectropion repair: May require skin grafting (full-thickness skin graft) or Z-plasty in addition to lid tightening
These help determine type, laterality, surgical method, and the correct CPT + eyelid modifier combination.
Coder’s Notes
Eyelid modifiers -E1—E4 are REQUIRED for all ectropion repair codes (67914-67917) — payers will deny or downcode without them
-E1 = upper left eyelid | -E2 = lower left eyelid | -E3 = upper right eyelid | -E4 = lower right eyelid
Do NOT use -LT / -RT for ectropion repair codes — those are reserved for blepharoplasty codes; using them here is a payer-triggering error
67917 is the workhorse code for involutional ectropion — lateral tarsal strip and Kuhnt-Szymanowski both fall under “extensive” repair; always choose 67917 when the operative report describes horizontal tightening with retractor reinsertion
Paralytic ectropion (H02.151-H02.156): The underlying cause (G51.0 Bell’s palsy or other CN VII etiology) should be sequenced first as the primary diagnosis, with ectropion as a secondary/manifestation code
Congenital ectropion is Excludes1 from H02.1- — use Q10.1 (congenital ectropion) instead; this is a hard exclusion
Cicatricial ectropion requiring a full-thickness skin graft — the skin graft (CPT 15120 or 15121) can be separately billed with modifier -51 when documented as a distinct service
Bilateral ectropion: Some Medicare carriers require two lines billed with -E2 and E5 (or -E2 + -E4) rather than a single line with modifier -50 — verify individual payer policy
Epiphora (H04.201-H04.209) should be coded additionally when documented — it directly supports medical necessity for surgical repair and demonstrates functional impairment
Corneal exposure (H16.-) coded additionally when documented also strengthens medical necessity
Cervical ectropion (N86) is a gynecological condition — completely unrelated to eyelid ectropion; never confuse or cross-code these
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