iStent is a minimally invasive glaucoma surgery (MIGS) procedure.
🔹 What is iStent?
A tiny implant that:
- Improves fluid drainage
- Reduces intraocular pressure
🔹 CPT Codes
- 0191T – iStent insertion (initial)
- 0376T – Each additional stent
👉 These are Category III codes (temporary/tracking codes)
🔹 When Performed
Often combined with:
- Cataract surgery (66984)
🔹 Billing Considerations
- Some payers consider it investigational
- Documentation must support:
- Glaucoma diagnosis
- Medical necessity
🔹 Common Denials
- Non-covered procedure
Missing documentation
