Crystal's MCW Coder HubICD-10 H02.402: Unspecified Ptosis of Left Eyelid
Quick Reference Table
| Element | Value |
|---|---|
| ICD-10 Code | H02.402 |
| Diagnosis | Unspecified ptosis of left eyelid |
| Parent Category | H02.4 - Ptosis of eyelid |
| Chapter | VII - Diseases of the eye and adnexa (H00-H59)[1] |
| Laterality | Left eyelid |
| Type | Acquired eyelid droop, etiology not specified |
| Billable | ✓ Yes (specific, reportable) |
| Requires 7th Digit | ✗ No |
| Typical Etiologies | Aponeurotic (involutional), myogenic, neurogenic, mechanical, traumatic |
| Functional Impact | Superior visual field loss, brow strain, frontal headaches, chin-up posture |
| HCC Status | No (non-HCC) |
| Excludes1 | Congenital eyelid malformations Q10.0-Q10.3 |
Short Definition
H02.402 describes ptosis (drooping) of the left upper eyelid when the type or cause of ptosis (mechanical, myogenic, paralytic, etc.) is not specified in the documentation. It is used for acquired eyelid droop affecting the left eye that is clinically significant but etiologically unspecified.
Full Description
What H02.402 Covers
- Ptosis = drooping of the upper eyelid that may partially or completely cover the pupil and reduce vertical palpebral fissure height.
- H02.402 is used when:
- Ptosis is acquired (not clearly congenital).
- The side is left eyelid.
- The chart does not specify whether the ptosis is mechanical, myogenic, paralytic, or other subtype.
- Documentation phrases that map here:
- “Left eyelid ptosis”
- “Droopy left upper lid”
- “Left upper eyelid droop (cause unclear)”
When a specific mechanism is documented (mechanical/myogenic/paralytic), you should move to the more specific child codes (H02.41x, H02.42x, H02.43x) instead of H02.402.
Etiology & Pathophysiology (High-Yield)
Common acquired causes of ptosis (even if unspecified for coding):
-
Aponeurotic (Involutional)
- Age-related stretching or dehiscence of the levator aponeurosis.
- Most common in older adults; lids may appear “low” with good levator function.
-
Myogenic
- Levator muscle weakness (e.g., myasthenia gravis, chronic progressive external ophthalmoplegia).
- Often fatigable or variable ptosis that worsens during the day.
-
Neurogenic
- Third-nerve palsy, Horner syndrome, or other cranial/sympathetic lesions.
- May be associated with anisocoria, motility deficits, or anhidrosis.
-
Mechanical
- Excess skin (dermatochalasis), edema, tumors, scarring, or heavy lesions weighting the lid.
-
Traumatic
- Levator or nerve damage from periocular trauma or prior surgery.
Note
In real-world coding, H02.402 is the “catch-all” when the provider only writes “ptosis left eyelid” without naming the mechanism.
Clinical Presentation
Common features:
- Visible drooping of the left upper eyelid.
- Reduced palpebral fissure on the left; may cover the pupil.
- Compensatory frontalis overaction (permanent raised brow, forehead wrinkling).
- Chin-up head posture to improve superior field.
- Symptoms: “Shadow” at top of vision, difficulty reading or driving, eyestrain, brow fatigue.
Red flags suggesting specific causes:
- Sudden onset with diplopia, extraocular movement deficits, or large anisocoria (think third-nerve palsy, aneurysm).
- Mild ptosis with miosis and anhidrosis (Horner syndrome).
- Fluctuating ptosis and fatigability (myasthenia gravis).
Coding Specifics
Code Structure Breakdown
| Characters | Value | Meaning |
|---|---|---|
| 1st-3rd | H02 | Other disorders of eyelid |
| 4th | .4 | Ptosis of eyelid |
| 5th-6th | 02 | Unspecified ptosis of left eyelid |
Note
H02.402 is fully specified and billable as written; it does not require any additional characters.
When to Use H02.402
Use H02.402 when:
- Provider documents ptosis or “drooping eyelid” of the left eye.
- The note does not specify whether the ptosis is mechanical, myogenic, or paralytic.
- Ptosis is acquired, not clearly congenital.
- Ptosis is clinically meaningful (symptoms, visual complaints, or objective field loss).
Do NOT use H02.402 when:
- Ptosis is congenital → use Q10.0-Q10.3 (Excludes1 for H02.4).
- Provider clearly documents:
- Mechanical ptosis of left eyelid → H02.412.
- Myogenic ptosis of left eyelid → H02.422.
- Paralytic ptosis of left eyelid → H02.432.
- Laterality differs:
Related ICD-10 Codes
| Code | Description | When to Use |
|---|---|---|
| H02.402 | Unspecified ptosis of left eyelid | Acquired left ptosis, type not documented (THIS) |
| H02.401 | Unspecified ptosis of right eyelid | Same, right side |
| H02.403 | Unspecified ptosis of bilateral eyelids | Both lids, type not documented |
| H02.409 | Unspecified ptosis of unspecified eyelid | Site unknown/not documented (avoid if possible) |
| H02.412 | Mechanical ptosis of left eyelid | Dermatochalasis, masses, scarring specified[ |
| H02.422 | Myogenic ptosis of left eyelid | MG or muscle disorder clearly stated |
| H02.432 | Paralytic ptosis of left eyelid | Third-nerve palsy, Horner syndrome documented |
| H02.83x | Dermatochalasis of eyelid | Redundant eyelid skin without true levator ptosis |
| Q10.0-Q10.3 | Congenital eyelid malformations | Congenital ptosis/blepharophimosis spectrum |
HCC Status
- H02.402 is NOT an HCC diagnosis.
- Ptosis is a localized anatomic/functional condition, not a risk-adjusted systemic disease.
- It does not map to CMS-HCC or Rx-HCC models and will not affect RAF scores in Medicare Advantage.
- However, in ophthalmology/oculoplastics, it is significant for medical necessity of functional eyelid surgery rather than cosmetic procedures.
Documentation Requirements
Elements to Support H02.402
Strong documentation should include:
-
Side & Site
- “Ptosis of left upper eyelid” - specify side and upper eyelid.
-
Acquired vs Congenital
- “Acquired” or “adult-onset” vs “congenital since childhood.”
- Absence of congenital language supports H02.4x; presence of congenital requires Q10.x.
-
Symptoms/Functional Impact
- Difficulty reading, driving, or seeing overhead objects.
- Superior visual field loss (preferably documented by perimetry).
- Need to raise brow or tilt head back to see.
-
Objective Measurements
- MRD1 (margin-reflex distance), levator function, fissure height.
- External photographs (for surgical pre-auth).
-
Etiology Workup Status
- If unclear: “Etiology undetermined at this time; no mass or neurologic deficit noted.”
- If a specific cause is known, consider using mechanical/myogenic/paralytic codes.
-
Plan of Care
- Observation, neurologic workup, or surgical correction (ptosis repair ± blepharoplasty).
Audit Red Flags
- “Congenital ptosis” documented but H02.402 used → should be Q10.x (Excludes1 conflict).
- Chart clearly says “mechanical ptosis due to dermatochalasis” but coded as unspecified H02.402 instead of H02.412.
- Cosmetic-only language (“patient dissatisfied with appearance”) with no functional impairment when billing functional ptosis repair codes.
- Lack of visual field testing or photographs where payer policy requires them for surgery approval.
Common CPT and ICD-10 Combinations
E/M and Eye Codes
| CPT | Description | Use With H02.402 |
|---|---|---|
| 99202-99205 | New office/clinic visit | Initial ptosis evaluation (primary care/ophthalmology) |
| 99212-99215 | Established office visit | Follow-up or pre-op evaluation |
| 92002-92004 | Ophthalmological services, new | Eye-focused evaluation for ptosis[3] |
| 92012-92014 | Ophthalmological services, established | Ophthalmology follow-up |
Diagnostic Testing
| CPT | Description | Notes |
|---|---|---|
| 92081-92083 | Visual field testing | Often needed to demonstrate superior field loss pre-op[4][9] |
| 92285 | External ocular photography | Pre-op documentation of eyelid position |
| 70480-70482 | CT orbit/temporal bone | If mass/trauma suspected |
| 70540-70543 | MRI orbit/brain | If neurogenic cause suspected (CN III, Horner)[2][3] |
Surgical Codes (Commonly Paired)
| CPT | Description | Context with H02.402 |
|---|---|---|
| 67901-67908 | Repair of blepharoptosis | Ptosis surgery (levator advancement, frontalis suspension) |
| 15822-15823 | Upper eyelid blepharoplasty | For dermatochalasis; may be combined with ptosis repair[9] |
| 67900 | Repair of eyelid defect | If reconstruction needed after lesion removal |
Many payer policies (e.g., CMS articles on blepharoplasty/ptosis repair) require documented ptosis (H02.4x) plus field loss and photos to justify these CPT codes as functional.[4][9]
Example Coding Scenarios
Scenario 1 - Basic Office Visit
Assessment: “Acquired ptosis of left upper eyelid with mild visual complaints. Etiology unclear; no EOM limitation, pupils equal, no mass or trauma. Likely involutional; will monitor.”
ICD-10: H02.402 (Unspecified ptosis of left eyelid)
CPT: 99213 (established office visit) ± 92081 (screening visual field)
Scenario 2 - Pre-Op Ptosis Repair (Still Unspecified)
Assessment: “Left upper eyelid ptosis with functional visual impairment. MRD1 OS 0.5 mm. Superior field loss ~30% improved with lid elevation. Cause suspected involutional; no neurologic signs. Ptosis repair medically necessary.”
ICD-10:
- H02.402 - Unspecified ptosis of left eyelid
- H53.40 - Visual field defects (if formally documented)
CPT:
Billing & Compliance Pearls
- Use H02.402 when the note does not specify mechanical/myogenic/paralytic cause, even if you suspect one clinically.
- If the surgeon or ophthalmologist explicitly documents “mechanical ptosis from dermatochalasis” or “myogenic ptosis due to MG”, upgrade to H02.412/H02.422 as appropriate.
- For functional surgery coverage:
- Document visual field loss, MRD1, functional complaints, and improvement with lid elevation.
- Attach visual fields and pre-op photos per payer policy.
References
[1] High-level chapter structure for H00-H06, including H02 as “Other disorders of eyelid” in the eye/adnexa chapter.[web:788]
[2] Clinical description and mechanisms of eyelid ptosis (myogenic, neurogenic, aponeurotic, mechanical, traumatic) with typical signs and fatigability patterns.[web:831]
[3] Clinical overviews of ptosis and droopy eyelid, including functional impact and treatment options.[web:866]
[4] ICD-10-CM classification for H02.4 “Ptosis of eyelid”, including child codes and Excludes1 note for congenital malformations Q10.0-Q10.3.[web:843]
[5] Additional explanation of H02.4 as “Ptosis of eyelid” within H02 and eye/adnexa context, with laterality modifiers.[web:870]
[6] Official descriptor for H02.402 - Unspecified ptosis of left eyelid, including classification under diseases of the eye and adnexa.[web:860]
[7] Crosswalk showing H02.401-H02.403 and differentiation from mechanical ptosis codes in the H02.41x range.[web:869]
[8] Related listing of H02.403, H02.40, H02.409, and H02.402 as similar “unspecified ptosis” codes by site/laterality.[web:865]
[9] Payer and CMS policy language on blepharoplasty/ptosis repair medical necessity, including need for documented field improvement and supporting ICD-10 codes.[web:871]