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ICD-10 Guide
DiagnosesAsteroid Hyalosis

Asteroid Hyalosis

ICD-10 Coding for Asteroid Hyalosis(H43.21, H43.22, H43.23)

PRIMARY SPECIALTYOphthalmology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Asteroid Hyalosis?
Essential facts and insights about Asteroid Hyalosis

Key Clinical Considerations:

  • Presence of yellow-white opacities in the vitreous humor, typically observed during a dilated fundus examination.
  • No associated inflammation or other retinal pathology; the condition is usually asymptomatic.
  • Physical examination may reveal floaters or visual disturbances, although many patients remain asymptomatic.
  • Imaging findings may include optical coherence tomography (OCT) showing the opacities in the vitreous.
  • Severity is generally not staged, but the presence of significant visual impairment may warrant further evaluation.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Complete patient history including onset of symptoms, duration, and any visual disturbances.
  • Specific terminology such as 'asteroid hyalosis' must be documented in the medical record.
  • Examples include: 'Patient presents with floaters and is diagnosed with asteroid hyalosis based on fundoscopic examination.'
  • Documentation must support medical necessity for any procedures or treatments related to the diagnosis.
  • Quality measures may include documentation of visual acuity assessments and follow-up care plans.

Coding Guidelines

Usage Guidelines & Examples

  • Use H43.21 for unilateral asteroid hyalosis, H43.22 for bilateral, and H43.23 for unspecified.
  • Do not use these codes for other vitreous opacities or conditions such as vitreous hemorrhage or retinal detachment.
  • Similar codes include H43.20 (unspecified vitreous opacities), but they do not specify asteroid hyalosis.
  • Common errors include misclassifying the condition as a more severe vitreous pathology; ensure accurate clinical findings are documented.
  • In complex cases, consider the patient's complete ocular history and any co-existing conditions before code selection.

Code Exclusions

Important Exclusions

  • Excludes conditions such as vitreous hemorrhage (H43.0) and retinal detachment (H33).
  • Alternative codes for excluded conditions include H43.0 for vitreous hemorrhage.
  • Conditions are excluded due to differing pathophysiology and treatment approaches.
  • Common mistakes include misdiagnosing asteroid hyalosis when other vitreous conditions are present.
  • Related but distinct conditions include syneresis and other forms of vitreous degeneration.

Related ICD-10 Codes

Primary Codes
H43.21
Unilateral asteroid hyalosis
H43.22
Bilateral asteroid hyalosis
H43.23
Asteroid hyalosis, unspecified
Ancillary Codes
Z01.00
Z01.01
Differential Codes
H43.1-

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Ophthalmology

Specialty Applications

  • Applies to patients with age-related changes in the vitreous humor.
  • Typically affects older adults, but can occur in younger individuals with specific risk factors.
  • Clinical settings include outpatient ophthalmology clinics and inpatient consultations.
  • Specialty-specific applications are primarily in ophthalmology, particularly in retinal specialties.
  • Treatment contexts may involve monitoring for changes in visual acuity or surgical intervention if symptomatic.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with asteroid hyalosis based on clinical findings of vitreous opacities.'

Template 2

Template: 'Clinical presentation consistent with asteroid hyalosis including floaters and no signs of inflammation.'

Template 3

Template: 'Diagnostic criteria for asteroid hyalosis met as evidenced by fundoscopic examination findings.'

Template 4

Template: 'Treatment plan initiated for asteroid hyalosis with monitoring of visual acuity.'

Template 5

Template: 'Follow-up care for asteroid hyalosis including monitoring for changes in symptoms.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Detailed documentation of clinical findings, patient history, and any visual symptoms.

How does this differ from similar diagnoses?

Asteroid hyalosis is characterized by specific opacities without inflammation, unlike other vitreous conditions.

What are common billing considerations?

Ensure that the diagnosis is clearly linked to any procedures performed for reimbursement.

What procedures are typically associated?

Related CPT codes may include those for comprehensive eye exams and OCT imaging.

Are there any quality reporting implications?

Quality measures may include tracking visual acuity and follow-up care for patients diagnosed with asteroid hyalosis.