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CPT®
66165

CPT® Code 66165
Deleted

Official Description

Fistulization of sclera for glaucoma; iridencleisis or iridotasis

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 66165 involves the surgical creation of a new drainage pathway for ocular fluids through the sclera, which is the white outer coating of the eyeball. This intervention is specifically aimed at managing glaucoma, a condition characterized by increased intraocular pressure due to inadequate drainage of aqueous humor, the fluid produced in the eye. In this procedure, the physician performs a fistulization of the sclera, which entails making an opening that allows for the outflow of excess fluid, thereby reducing pressure within the eye. The technique may involve iridencleisis or iridotasis, which are methods that utilize a portion of the iris to facilitate the drainage process. By drawing fluid from one side of the eye to the other, the procedure aims to restore normal fluid dynamics and alleviate the symptoms associated with glaucoma, ultimately preserving vision and preventing further ocular damage.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure indicated by CPT® Code 66165 is performed for specific conditions related to glaucoma. The following are the primary indications for this surgical intervention:

  • Glaucoma A condition where the intraocular pressure is elevated due to insufficient drainage of aqueous humor, leading to potential damage to the optic nerve and loss of vision.

2. Procedure

The procedure for CPT® Code 66165 involves several critical steps to ensure effective fistulization of the sclera. The following outlines the procedural steps:

  • Step 1: Anesthesia Administration The procedure begins with the administration of local anesthesia to ensure patient comfort during the surgery. This may involve the use of topical anesthetics or injections around the eye to numb the area.
  • Step 2: Scleral Incision The surgeon then makes a precise incision in the sclera, the tough outer layer of the eye. This incision is carefully placed to create an opening that will allow for the drainage of excess fluid.
  • Step 3: Creation of Drainage Pathway Following the incision, the surgeon creates a new drainage pathway by utilizing techniques such as iridencleisis or iridotasis. This involves using a portion of the iris to facilitate the movement of fluid from the anterior chamber of the eye to the newly created drainage site.
  • Step 4: Closure and Monitoring After establishing the drainage pathway, the surgeon closes the scleral incision, ensuring that the new drainage system is secure. The eye is then monitored for any immediate complications, and the patient is prepared for post-operative care.

3. Post-Procedure

Post-procedure care following the fistulization of the sclera for glaucoma is crucial for recovery and includes monitoring for any signs of complications such as infection or excessive bleeding. Patients are typically advised to follow up with their ophthalmologist for regular assessments of intraocular pressure and overall eye health. Additionally, the use of prescribed eye drops may be necessary to manage inflammation and prevent infection. Recovery time can vary, but patients are generally encouraged to avoid strenuous activities and to adhere to any specific instructions provided by their healthcare provider to ensure optimal healing.
Short Descr GLAUCOMA SURGERY
Medium Descr FSTLJ SCLERA GLAUCOMA IRIDENCLEISIS/IRIDOTASIS
Long Descr Fistulization of sclera for glaucoma; iridencleisis or iridotasis
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 9 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Procedure or Service, Multiple Reduction Applies
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P4E - Eye procedure - other
MUE Not applicable/unspecified.
CCS Clinical Classification 14 - Glaucoma procedures
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2015-01-01 Deleted Code deleted
Pre-1990 Added Code added.
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