Crystal's MCW Coder Hub👁️ ICD-10 CM H02.051 — Trichiasis Without Entropion, Right Upper Eyelid
Billable Code — No Warning Needed
ICD-10-CM H02.051 is a valid, billable, fully specified 6-character ICD-10-CM code for FY2026. All six characters are present and meaningful:
H02(other disorders of eyelid) +.05(trichiasis without entropion) +1(right upper eyelid). This is the most specific code available for misdirected right upper eyelid lashes in the absence of eyelid margin inversion.
Non-Billable Parent Codes
- ❌
H02.05— 5-character header — missing laterality/eyelid character- ❌
H02.0— 4-character header — missing specificity Always submit H02.051 (all 6 characters) for trichiasis without entropion, right upper eyelid.
Trichiasis ≠ Entropion — Know the Difference
Trichiasis without entropion means the eyelid margin position is normal — only the lashes are misdirected inward. Entropion (H02.0xx) means the entire eyelid margin has turned inward. If the physician documents both misdirected lashes and an inward-turning lid, query for the appropriate entropion code (H02.001-H02.046) — not H02.051. Getting this wrong is one of the most common eyelid coding errors.
🔍 Code Description
ICD-10-CM H02.051 classifies trichiasis of the right upper eyelid occurring without concurrent entropion — meaning one or more eyelashes of the right upper lid are growing in an abnormal direction (inward, toward the cornea or conjunctiva) while the eyelid margin itself remains in its normal anatomic position.
The misdirected lashes cause mechanical irritation by rubbing against the corneal epithelium and bulbar conjunctiva, producing chronic foreign body sensation, tearing, photophobia, conjunctival injection, and — if untreated — corneal abrasion, pannus formation, or scarring. The “without entropion” designation is a critical clinical and coding distinction that must be supported by documentation confirming a normally positioned lid margin.
🌳 Code Tree / Hierarchy
H02.0 Entropion and trichiasis of eyelid ❌ Non-billable header
│
└── H02.05 Trichiasis without entropion ❌ Non-billable header
│
├── H02.051 Right upper eyelid ◀ THIS CODE ✅
├── H02.052 Right lower eyelid ✅
├── H02.053 Right eye, unspecified eyelid ✅ (use only if lid not documented)
├── H02.054 Left upper eyelid ✅
├── H02.055 Left lower eyelid ✅
├── H02.056 Left eye, unspecified eyelid ✅ (use only if lid not documented)
└── H02.059 Unspecified eye, unspecified eyelid ⚠️ last resort
H02.051 vs. Adjacent Laterality Codes
| Code | Eye | Lid | Notes |
|---|---|---|---|
| H02.051 | Right | Upper | ◀ This code |
| H02.052 | Right | Lower | Right lower lid lashes only |
| H02.053 | Right | Unspecified | Only if documentation doesn’t specify upper vs. lower |
| H02.054 | Left | Upper | Mirror of this code, left eye |
| H02.055 | Left | Lower | Left lower lid lashes |
| H02.056 | Left | Unspecified | Only if documentation doesn’t specify |
| H02.059 | Unspecified | Unspecified | Documentation deficiency — avoid |
📋 Clinical Overview
What Is Trichiasis?
Trichiasis is a condition in which one or more eyelashes are misdirected — growing inward toward the globe rather than outward away from it. The lashes mechanically abrade the corneal epithelium and conjunctiva with every blink, producing:
| Symptom | Details |
|---|---|
| Foreign body sensation | Classic chief complaint — “feels like something is in my eye” |
| Epiphora (tearing) | Reflex lacrimation from corneal irritation |
| Photophobia | Corneal epithelial disruption increases light sensitivity |
| Conjunctival injection | Chronic mechanical irritation → redness |
| Corneal abrasion / erosion | If untreated — each blink = repeated microtrauma to corneal epithelium |
| Corneal pannus / scarring | End-stage — chronic trichiasis without treatment can cause permanent vision loss |
Trichiasis vs. Entropion — The Critical Coding Distinction
| Feature | Trichiasis Without Entropion (H02.051) | Entropion (H02.00x-H02.046) |
|---|---|---|
| Eyelid margin position | Normal — lid is in correct position | Inverted — entire lid margin turns inward |
| Lash direction | Misdirected inward | All lashes point inward (lid is inverted) |
| Documentation clue | ”Misdirected lashes,” “ingrowing lash,” “lash touching cornea" | "Eyelid turning in,” “entropion,” “lid inversion” |
| Treatment | Epilation (67820/67825), electrolysis, cryotherapy, laser | Surgical lid repair (67921-67924) |
| Code family | H02.051-H02.059 | H02.001-H02.046 |
Entropion Can Co-Exist With Trichiasis — But NOT This Code
When entropion is present AND lashes are misdirected, the entropion is the underlying cause of the trichiasis — code the entropion (H02.0xx), not H02.051. The “without entropion” qualifier is what makes H02.051 appropriate. If documentation mentions both a turned lid and misdirected lashes, the entropion code captures both findings.
Common Etiologies
- Idiopathic / involutional — most common in older adults; isolated lash follicle misdirection
- Post-inflammatory — secondary to chronic blepharitis, conjunctival scarring (e.g., trachoma, Stevens-Johnson syndrome, ocular cicatricial pemphigoid)
- Post-traumatic / post-surgical — eyelid scarring from injury or prior lid surgery
- Epiblepharon — a congenital variant common in Asian children (note: congenital malformations of the eyelid are excluded from H02 — see Excludes1 below)
Excludes1 — Congenital Eyelid Malformations
🛠️ CPT / HCPCS — Trichiasis Right Upper Eyelid Treatment
Epilation Procedure Codes
| CPT | Description | Modifier | Notes |
|---|---|---|---|
| 67820 | Correction of trichiasis; epilation by forceps only | -RT (right eye); -E3 (right upper lid) | Standard first-line treatment; mechanical forceps removal |
| 67825 | Correction of trichiasis; epilation by other than forceps (e.g., electrosurgery, cryotherapy, laser surgery) | -RT (right eye); -E3 (right upper lid) | Used when lash ablation/destruction is performed |
Modifier Strategy — Per Eye vs. Per Lid
Modifier usage for 67820 and 67825 varies by payer:
- Medicare — bill -50 (bilateral) if both eyes treated same day; use -RT or -LT when unilateral
- Private payers — many accept eyelid-specific modifiers: -E1 (upper left), -E2 (lower left), -E3 (upper right), -E4 (lower right)
- When multiple lids of the same eye are treated same day, modifier -51 (multiple procedures) applies to the second code line Always verify your MAC/payer policy before defaulting to bilateral vs. per-lid modifier convention.
Exam Codes — Trichiasis Visit
| CPT | Description | Use When |
|---|---|---|
| 92004 | Comprehensive ophthalmologic exam — new patient | New patient presenting with trichiasis |
| 92014 | Comprehensive ophthalmologic exam — established patient | Follow-up trichiasis management |
| 92012 | Intermediate ophthalmologic exam — established patient | Limited visit, trichiasis check only |
💊 Coding Scenarios
Scenario 1 — Epilation by Forceps, Right Upper Eyelid (Outpatient)
Clinical Vignette: A 68-year-old female presents with chronic foreign body sensation, right eye × 3 months. Slit lamp exam: two misdirected lashes, right upper eyelid, touching the corneal epithelium. Lid margin in normal position. No entropion. Physician performs epilation by forceps, right upper eyelid. Patient tolerates well.
CPT / HCPCS:
- 92014 — Comprehensive exam, established patient
- 67820-RT (or -E3 per payer) — Epilation by forceps, right upper eyelid
ICD-10-CM:
- H02.051 — Trichiasis without entropion, right upper eyelid
Scenario 2 — Laser Epilation, Right Upper and Right Lower Eyelid, Same Visit
Clinical Vignette: Established patient with recurrent trichiasis, right eye. Multiple misdirected lashes, upper and lower right eyelids. Lid margins are in normal position bilaterally. Physician performs laser epilation (argon) of right upper and right lower lids same session.
CPT / HCPCS:
- 67825-E3 — Epilation by laser, right upper eyelid
- 67825-51-E4 — Epilation by laser, right lower eyelid (modifier -51 for multiple procedures same session)
- 92014 — Comprehensive exam, established patient
ICD-10-CM:
- H02.051 — Trichiasis without entropion, right upper eyelid
- H02.052 — Trichiasis without entropion, right lower eyelid
Scenario 3 — Trichiasis as Additional Diagnosis, Inpatient Admission
Clinical Vignette: A 74-year-old male admitted for elective cataract surgery, right eye (H26.013). H&P documents: “Chronic trichiasis, right upper lid — managed with periodic epilation by ophthalmologist — no intervention planned this admission.” Active and being managed — meets UHDDS criteria as additional diagnosis.
Principal Diagnosis:
- H26.013 — Combined forms of cataract, right eye (principal — reason for admission)
Additional Diagnoses:
- H02.051 — Trichiasis without entropion, right upper eyelid (documented active condition, being managed)
UHDDS Reminder — Does Trichiasis Make the Cut?
Under UHDDS guidelines, a condition qualifies as an additional diagnosis if it affects patient care by requiring clinical evaluation, therapeutic treatment, diagnostic procedures, extended length of stay, or increased nursing care/monitoring. If the H&P documents the trichiasis and the ophthalmologist is managing it — even if no procedure is performed this admission — it meets the threshold. If it’s truly incidental with zero clinical impact this stay, it’s your call as a CIC whether to include it.
⚠️ Coding Pitfalls and Tips
| Pitfall or Tip | |
|---|---|
| ❌ | Never assign H02.051 when entropion is present — entropion codes (H02.00x-H02.046) capture misdirected lashes caused by lid inversion; H02.051 is explicitly “without entropion” |
| ❌ | Never use the unspecified code H02.059 when documentation clearly states right upper lid — specificity is always required when documented |
| ❌ | Never omit the -RT (or eyelid) modifier on 67820 or 67825 — laterality is required for correct claim adjudication, especially for bilateral patients |
| ❌ | Never assign H02.051 for congenital trichiasis/epiblepharon — use Q10.3x family; Excludes1 applies |
| ✅ | Check for concurrent dry eye or corneal codes — H04.121-H04.129 (dry eye syndrome) or H16.011-H16.013 (corneal abrasion) may be separately codeable if documented and clinically present |
| ✅ | Verify modifier convention with your MAC before billing bilateral or multi-lid epilation — -50 vs. -E1-E4 rules vary significantly by payer |
| ✅ | The treatment CPT is your fastest clue to the right code family — if the physician bills 67820 or 67825, you’re in the H02.05x world, not the entropion world |
| ✅ | For inpatient profee coding — document trichiasis as an additional diagnosis if actively managed (even conservatively) during the admission |
🔗 Related ICD-10-CM Codes
H02.05x — Full Trichiasis Without Entropion Family
| Code | Description | Billable? |
|---|---|---|
| H02.05 | Trichiasis without entropion (header) | ❌ Non-billable |
| H02.051 | Right upper eyelid ← This Code | ✅ |
| H02.052 | Right lower eyelid | ✅ |
| H02.053 | Right eye, unspecified eyelid | ✅ |
| H02.054 | Left upper eyelid | ✅ |
| H02.055 | Left lower eyelid | ✅ |
| H02.056 | Left eye, unspecified eyelid | ✅ |
| H02.059 | Unspecified eye, unspecified eyelid ⚠️ | ✅ (last resort) |
Concurrent / Related Diagnoses — Co-Code When Documented
| Code | Description | Co-Code When |
|---|---|---|
| H16.011 | Corneal abrasion, right eye | Documented epithelial trauma from misdirected lashes |
| H16.012 | Corneal abrasion, left eye | Left eye corneal involvement |
| H10.811 | Conjunctivitis, right eye (other) | Documented conjunctival irritation/injection |
| H04.121 | Dry eye syndrome, right lacrimal gland | Co-existing dry eye documented |
| H02.811 | Retention cyst of right upper eyelid | If cyst noted on same lid at same encounter |
📚 Sources
1. AAPC Codify. “ICD-10 Code H02.051 — Trichiasis without entropion, right upper eyelid.” Valid and billable FY2026.
2. AAPC Codify. “ICD-10 Code H02.05 — Trichiasis without entropion.” Full subcategory listing H02.051-H02.059; Excludes1 note at H02 for Q10.0-Q10.3.
3. Unbound Medicine ICD-10-CM. “H02.05 — Trichiasis without entropion.” Non-billable header; all 7 child codes confirmed.
4. AAPC Ophthalmology Coding Alert. “Code Epilation for Trichiasis.” CPT 67820 and 67825 modifier strategy; per-eye vs. per-lid billing convention; -50/-RT/-LT/-E1-E4 guidance.
5. MD Clarity. “CPT Code 67820: What It Is, Modifiers, Reimbursement.” Forceps epilation billing; modifier applicability; medical necessity documentation requirements.
6. Premier Eye Care / CMS. “Correction of Trichiasis — CPT 67820 / 67825.” Procedure code descriptions; epilation method distinctions.