Crystal's MCW Coder Hub🧬ICD-10 H02.433: Paralytic Ptosis of Bilateral Eyelids
Quick reference table
| Element | Value |
|---|---|
| ICD-10-CM code | H02.433 |
| Official descriptor | Paralytic ptosis of bilateral eyelids |
| Parent category | H02.43 - Paralytic ptosis of eyelid (synonym: Neurogenic ptosis of eyelid) |
| ICD-10-CM block | H00-H05 (Disorders of eyelid, lacrimal system and orbit) |
| Laterality | Bilateral (both eyelids) |
| Billable | âś“ Yes (terminal, reportable code) |
| Excludes1 | Congenital malformations of eyelid (Q10.0-Q10.3) |
| Clinical meaning | Ptosis caused by impaired neural input (classically CN III and/or sympathetic pathway) |
| HCC status | Not a CMS-HCC code (non-HCC); underlying etiology may be HCC-relevant depending on diagnosis |
| Common payer relevance | Listed in CMS billing/coding contexts for eyelid surgery and visual field testing indications |
Short description
ICD-10 CM H02.433 reports paralytic (neurogenic) ptosis affecting both eyelids, meaning upper-lid droop due to nerve pathway dysfunction rather than tissue weight (mechanical) or primary muscle disease (myogenic).
Use ICD-10 CM H02.433 when documentation explicitly supports a neurogenic/paralytic mechanism and confirms bilateral involvement.
Full description (clinical)
Ptosis (blepharoptosis) is drooping of the upper eyelid that can partially or completely cover the pupil and reduce the vertical palpebral fissure height. Patients often compensate with frontalis overaction (raised brows/forehead wrinkling) and sometimes a chin-up posture to improve the superior visual field.
Paralytic (neurogenic) ptosis occurs when eyelid elevation is reduced due to impaired innervation to eyelid elevators—most notably CN III (oculomotor nerve) to the levator palpebrae superioris and/or sympathetic input to Müller’s muscle. Bilateral paralytic ptosis may be documented in settings such as bilateral or midline brainstem involvement of levator subnuclei, neuromuscular/toxin-related paralysis patterns, or other neurogenic disorders affecting both sides.
Horner syndrome is a classic neurogenic cause of (usually mild) ptosis associated with miosis and reduced sweating (anhidrosis), and documentation may differentiate it from CN III palsy patterns by pupil findings and severity. Because H02.433 is a ptosis code (not an etiology code), the underlying cause should be coded separately when known (e.g., aneurysm, stroke, tumor, diabetes-related ischemic CN III palsy, trauma).
Coding specifics (coder-facing)
What “paralytic” requires
“H02.433” is appropriate when the provider identifies the ptosis as paralytic/neurogenic, not just “ptosis,” and clearly states the ptosis involves both eyelids. If the provider only documents “ptosis OU” without mechanism, default to the unspecified ptosis codes (H02.40x) rather than paralytic.
When to code H02.433
- Assessment/diagnosis states “paralytic ptosis” or “neurogenic ptosis” and it is bilateral. ]
- Documentation supports neurogenic patterns (e.g., “ptosis due to CN III palsy,” “ptosis due to Horner syndrome”), and both sides are affected.
When NOT to code H02.433
- Mechanical ptosis (excess skin/dermatochalasis, lid edema, tumor mass effect, scarring) should be coded to H02.41x when that mechanism is documented.
- Myogenic ptosis (levator muscle weakness or clearly documented myogenic/neuromuscular junction fatigue pattern coded as myogenic) should be coded to H02.42x when documented.
- Congenital ptosis/malformations are excluded from H02.43 and belong in Q10.0-Q10.3 when documented as congenital.
Neighbor codes (same family)
| Code | Description | Use when |
|---|---|---|
| H02.43 | Paralytic ptosis of eyelid (category) | Parent category |
| H02.431 | Paralytic ptosis of right eyelid | Right only |
| H02.432 | Paralytic ptosis of left eyelid | Left only |
| H02.433 | Paralytic ptosis of bilateral eyelids | Both eyelids |
| H02.439 | Paralytic ptosis, unspecified eyelid | Laterality missing (avoid if possible) |
HCC information (risk adjustment)
H02.433 is not a CMS-HCC diagnosis code and generally does not affect RAF scoring by itself.
The underlying neurologic/vascular/systemic diagnosis causing the paralytic ptosis (e.g., stroke, aneurysm, tumor, diabetes complications, neuromuscular/toxin disorders) may be HCC-relevant depending on the model/year and should be coded when documented.
If your workflow requires HCC confirmation, verify the patient’s etiology codes against your organization’s current-year CMS-HCC mapping file (HCC mapping is model- and year-specific).
Documentation requirements (work-ready)
Minimum documentation elements to support H02.433
- Bilateral involvement: “OU,” “bilateral upper eyelid ptosis,” or equivalent.
- Mechanism language: “paralytic ptosis,” “neurogenic ptosis,” “ptosis due to CN III palsy,” or “ptosis due to Horner syndrome.”
- Neuro-ophthalmic exam basics: pupils and extraocular movements documented to support CN III vs Horner vs other neurogenic patterns.
- Functional impact: superior visual field obstruction, difficulty reading/driving, brow fatigue, compensatory posture.
- Acquired vs congenital statement: avoid congenital language unless it’s truly congenital (then Q10.x applies).
Helpful objective elements (especially for coverage/functional surgery pathways)
- MRD1 and levator function measurements for each eyelid (commonly used in ptosis evaluation documentation).
- External photos showing eyelid position at rest and with brow elevation.
- Visual field testing demonstrating superior field obstruction and improvement with lid elevation (payer requirements vary).
Provider query triggers (common)
- “Ptosis OU” documented but no mechanism; coder selected H02.433 → query for paralytic vs mechanical vs myogenic vs unspecified.
- Etiology (e.g., “CN III palsy,” “Horner”) appears elsewhere, but assessment only says “ptosis” → query provider to document “paralytic/neurogenic ptosis” explicitly if appropriate.
- Documentation says congenital/since childhood but H02.433 billed → query and correct due to Excludes1.
Common CPT pairings (examples)
E/M and eye exam codes (depends on setting)
CPT is the standard U.S. procedure code set (HCPCS Level I) used to report services.
Common visit types used in ptosis evaluations include E/M office visits (new/established) and ophthalmological services codes, depending on specialty workflow.
Diagnostics commonly used in paralytic ptosis workup / functional documentation
- Visual fields (92081-92083) often appear in coverage workflows when ptosis causes superior field obstruction, and CMS billing/coding guidance includes ptosis diagnoses like H02.433 in visual field examination contexts.
- External ocular photography (92285) is commonly used to document eyelid position for preauthorization packets in eyelid surgery workflows.
- CT/MRI head/orbit may be ordered when neurogenic patterns (e.g., CN III palsy with concerning features) warrant imaging per clinical evaluation patterns.
Surgical context (if functional correction is pursued)
CMS billing/coding articles for blepharoplasty/blepharoptosis repair include H02.433 among diagnoses used in claims contexts when medical-necessity criteria are met.
Sample ICD-10 combinations (pick based on documentation)
Because H02.433 is a manifestation code for neurogenic ptosis, pair it with the underlying condition when documented.
Examples (illustrative—not exhaustive): neurogenic ptosis + documented CN III palsy etiology, neurogenic ptosis + Horner syndrome, or neurogenic ptosis + stroke/tumor/aneurysm diagnosis as supported by the record.
Sample documentation (clinic note template)
CC: Drooping upper eyelids (both sides).
HPI: Adult patient with acquired, progressive bilateral upper eyelid droop and superior visual field interference. Reports brow fatigue and difficulty with reading/driving due to upper field obstruction.
Exam: Bilateral ptosis documented. Pupils and extraocular movements documented to evaluate for neurogenic patterns (CN III-related findings, Horner pattern with miosis/anhidrosis).
MRD1 and levator function recorded for each eyelid if available.
Assessment: Paralytic (neurogenic) ptosis of bilateral eyelids. Differential/etiology: document suspected/confirmed cause (e.g., CN III palsy vs Horner vs other neurologic process) and code separately once confirmed.
Plan: Neuro workup/imaging as indicated by presentation. If functional surgery pathway is considered, document functional impairment and obtain visual fields and external photos per payer workflow.
ICD-10-CM: H02.433 + underlying etiology ICD-10-CM code(s) (as documented). CPT (examples, if performed): E/M visit + 92083 (visual field) + 92285 (external photos).
Sources (compact)
- Code definition and laterality: H02.433 descriptor pages. [web:979][web:978]
- Category structure + Excludes1 + sibling codes list: H02.43 category page. [web:945]
- Clinical patterns differentiating neurogenic ptosis (CN III palsy, Horner, pupil findings, bilateral possibilities): ptosis clinical discussion and Horner syndrome overview. [web:831][web:873]
- CMS billing/coding context (visual fields; blepharoplasty/blepharoptosis repair): CMS MCD articles listing H02.433. [web:974][web:838][web:962]