Acute Angle-Closure Glaucoma
Understanding Acute Angle-Closure Glaucoma, also known as an Acute Angle-Closure Attack or Glaucoma Crisis, is crucial for accurate clinical documentation and medical coding. This page provides information on diagnosis, symptoms, and treatment of Acute Angle-Closure Glaucoma, supporting healthcare professionals in proper coding and documentation for optimal patient care. Learn about Acute Angle-Closure Glaucoma diagnosis codes, clinical findings, and best practices for healthcare providers.
Sudden blockage of eye's drainage, causing rapid pressure buildup.
Severe eye pain, blurred vision, nausea, vomiting, halos around lights, red eye.
Emergency room, ophthalmology clinic, urgent care.
ICD-10 Code Families
Complete code families applicable to H40.219
When to use each related code
| Description | When to use |
|---|---|
| Severe, rapid IOP increase causing eye pain, vision loss. | Acute onset eye pain, nausea, halos, blurry vision, red eye. Code only when angle closure is confirmed. |
| IOP elevation damages optic nerve, causing gradual vision loss. | Chronic, progressive vision loss, optic nerve damage. Use for open-angle or unspecified glaucoma. |
| Narrowed drainage angle increases risk of angle closure glaucoma. | Narrow anterior chamber angles, potential for angle closure. Patient may be asymptomatic. |
Best-practice checklist
- ✓Document IOP elevation (e.g., >21 mmHg).
- ✓Describe symptoms: acute eye pain, blurred vision, nausea/vomiting.
- ✓Note signs: corneal edema, fixed mid-dilated pupil, conjunctival injection.
- ✓Record gonioscopy findings confirming angle closure.
- ✓Include ICD-10 code H40.23 (acute angle-closure glaucoma).
Common pitfalls to avoid
Missing or incorrect laterality (right, left, bilateral) for Acute Angle-Closure Glaucoma can impact reimbursement and data accuracy.
Miscoding primary versus secondary Acute Angle-Closure Glaucoma based on underlying causes affects severity and treatment coding.
Confusing acute with chronic angle-closure glaucoma leads to inaccurate coding, impacting quality reporting and resource allocation.
Best-practice tips
- 01Timely diagnosis: Gonioscopy, IOP check crucial for AACG. Code H40.20
- 02Document AACG symptoms: Blurred vision, halos, eye pain. ICD-10 H40.20
- 03Start treatment immediately: Lower IOP with meds, laser iridotomy. CDI query AACG vs. other glaucoma
- 04Monitor IOP closely post-treatment: Prevent vision loss, compliance with guidelines. H40.20, H40.23 coding
- 05Patient education: AACG urgency, medication adherence vital. Improve documentation for accurate billing
Step-by-step checklist
- 1
Verify IOP >21 mmHg or elevated for patient baseline.
- 2
Check for symptoms: acute eye pain, blurred vision, nausea/vomiting.
- 3
Confirm corneal edema, fixed mid-dilated pupil, shallow anterior chamber.
- 4
Gonioscopy if safe: assess for narrow or closed angle (ICD-10-CM H40.20).
- 5
Document optic nerve status and visual field defects for accurate coding (SNOMED CT 36634009).
Ready-to-paste narrative
Patient presents with acute onset of severe eye pain, blurred vision, and halos around lights in the right eye, consistent with an acute angle-closure glaucoma attack. Symptoms began approximately two hours prior to presentation and are accompanied by nausea and vomiting. Ocular examination reveals conjunctival injection, a cloudy cornea, a mid-dilated, non-reactive pupil, and elevated intraocular pressure measured at 48 mmHg. The left eye shows no acute changes, with intraocular pressure of 18 mmHg. Gonioscopy confirms narrow angles in both eyes. The patient denies any prior history of glaucoma or eye trauma. Differential diagnoses include acute iritis and corneal ulcer, but the clinical presentation strongly favors acute angle-closure glaucoma. Initial treatment includes topical timolol, brimonidine, and pilocarpine, along with oral acetazolamide to lower intraocular pressure. The patient will be closely monitored for response to therapy and considered for laser peripheral iridotomy once the intraocular pressure is adequately controlled. This acute angle-closure glaucoma crisis requires urgent ophthalmologic consultation, which has been arranged. Diagnosis codes include H40.2031 for right eye, acute angle-closure glaucoma. The patient's symptoms, exam findings, and treatment plan were thoroughly explained, and all questions were answered. Follow-up appointment scheduled in 24 hours.
Common questions and answers
How do I differentiate acute angle-closure glaucoma from other causes of acute red eye in a primary care setting?+
Differentiating acute angle-closure glaucoma (AACG) from other acute red eye causes like conjunctivitis or uveitis requires careful assessment. In AACG, patients typically present with sudden onset severe eye pain, blurred vision, nausea, and vomiting, often accompanied by a mid-dilated, non-reactive pupil and a hazy cornea. Unlike conjunctivitis, there is usually no significant discharge. While uveitis can also cause pain and redness, it usually presents with a smaller pupil and photophobia. Accurate diagnosis requires measuring intraocular pressure (IOP), which is markedly elevated in AACG. A shallow anterior chamber depth on slit-lamp examination further supports the diagnosis. Prompt ophthalmological referral is crucial to prevent permanent vision loss. Explore how integrating tonometry into your primary care practice can improve early AACG detection and management.
What are the best initial emergency management steps for suspected acute angle-closure glaucoma before ophthalmology consultation?+
Suspected acute angle-closure glaucoma (AACG) demands immediate action to lower intraocular pressure (IOP) before ophthalmology consultation. Initial management involves topical IOP-lowering medications like timolol maleate 0.5%, pilocarpine 1-2%, and apraclonidine 1%. Systemic medications, such as acetazolamide (oral or intravenous), can also be initiated to decrease aqueous humor production. Consider implementing a standardized protocol for suspected AACG in your emergency department, ensuring prompt treatment initiation and timely specialist referral. Learn more about the evidence-based guidelines for emergency management of AACG.
What are the long-term management strategies and follow-up recommendations for patients after an acute angle-closure glaucoma attack?+
Long-term management following an acute angle-closure glaucoma (AACG) attack focuses on preventing recurrence and preserving vision. This includes laser peripheral iridotomy (LPI) to create an alternative pathway for aqueous humor outflow, often performed bilaterally. Topical IOP-lowering medications may be continued long-term to maintain target IOP. Regular ophthalmologic follow-up is essential to monitor IOP, assess optic nerve damage, and adjust treatment as needed. Patients also require education on recognizing the signs and symptoms of AACG recurrence. Consider implementing a comprehensive patient education program that emphasizes the importance of adherence to long-term treatment plans and regular follow-up appointments.
Clinical accuracy: This information is provided for documentation and coding guidance and should not replace professional medical judgment.
Coding standard: ICD-10-CM, current FY guidelines.