Summary & Overview

CPT 0661T: Intraocular Drug‑Delivery Implant Exchange

CPT code 0661T captures a single, discrete ophthalmic procedure: removal of a previously placed anterior-segment, controlled‑release drug implant and immediate replacement with a new implant. The code matters nationally as advanced sustained‑release ocular implants become more common for chronic anterior‑segment conditions such as glaucoma, shifting care to ambulatory surgical settings and raising questions about access, coding clarity, and payer coverage policies. Key payers in the national landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

This publication provides a concise overview of clinical context, coding scope, and the operational settings where the service is delivered. Readers will find benchmark and coverage considerations relevant to this procedure, a summary of common modifiers encountered in claims, and the clinical rationale for implant exchange versus other glaucoma treatments. The material is organized for clinicians, billing professionals, and policy analysts seeking a clear, national perspective on how CPT code 0661T is used and reimbursed across major payers. Data not available in the input will be noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare0661TCPTophthalmologyocular implantglaucomaimplant exchangeambulatory surgerydrug-delivery devicesurgical code

Billing Code Overview

CPT code 0661T describes the removal of a previously placed intraocular drug-delivery implant from the anterior segment of the eye followed by implantation of a new controlled‑release device that delivers medication to treat conditions such as glaucoma. The service involves explantation of the existing ocular implant and immediate replacement with a new implant designed to provide sustained drug delivery to the front-most region of the eye.

Service type: Surgical implant exchange with intraocular drug delivery
Typical site of service: Ambulatory surgical center or hospital outpatient department where ophthalmic implant procedures are performed

Clinical & Coding Specifications

Clinical Context

A 68-year-old patient with medically uncontrolled primary open-angle glaucoma returns to the ophthalmology clinic for management after an earlier placement of an anterior-segment, drug-delivery ocular implant designed to release medication over time. The patient reports progressive visual field loss and fluctuating intraocular pressure despite topical therapy. Examination demonstrates a functioning but depleted implant and signs of disease progression in the treated eye. The provider schedules a same-day procedure to explant the depleted device and replace it with a new implant that delivers a controlled-release glaucoma medication into the anterior chamber.

The clinical workflow includes preoperative evaluation (history, medication reconciliation, informed consent, ocular exam, visual acuity, intraocular pressure measurement), perioperative topical and/or local anesthesia, sterile preparation, removal of the existing anterior-segment implant, insertion and securement of the new controlled-release implant, wound closure or intraocular tamponade as indicated, and immediate postoperative assessment. Post-procedure care involves topical antibiotics and anti-inflammatory agents, intraocular pressure monitoring, and scheduled follow-up visits to assess implant position, ocular inflammation, and therapeutic effect.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work effort substantially exceeds typical for due to complexity or extensive additional procedures.

Taxonomy Code	Specialty	Notes
`207W00000X`	Ophthalmology	Retinal and anterior segment surgeons who place and exchange anterior-segment implants.
`207WP0005X`	Glaucoma Specialist	Subspecialists who manage glaucoma and perform targeted device exchanges.
`2080P0207X`	Physician Assistant	Clinicians who assist in perioperative and postoperative management; may assist in the OR depending on state law.
`363L00000X`	Nurse Practitioner	NPs involved in pre- and postoperative care and may assist clinically in the perioperative setting.
`208000000X`	Anesthesiology	Providers who deliver sedation or anesthesia services for patients requiring deeper sedation or general anesthesia.

ICD-10 Code	Description	Clinical Relevance
`H40.11X1`	Primary open-angle glaucoma, mild stage, right eye	Common indication for sustained-release anterior-segment glaucoma implants when topical therapy is insufficient.
`H40.11X2`	Primary open-angle glaucoma, mild stage, left eye	Same as above for the opposite eye.
`H40.22X0`	Primary angle-closure glaucoma, indeterminate stage, unspecified eye	Angle-closure variants may prompt device exchange if mechanism or treatment plan requires anterior-segment drug delivery.
`H40.9`	Glaucoma, unspecified	Used when more specific glaucoma subtype is not documented but implant exchange is performed for glaucoma control.
`H11.39`	Other peripheral anterior synechiae	Anterior segment anatomic issues that may affect implant placement or removal and necessitate exchange or additional procedures.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`0661T`	Removal and replacement of previously placed anterior-segment, drug-delivery ocular implant	Primary procedure: explantation of a depleted anterior-segment implant and insertion of a new controlled-release implant.
`01916`	Anesthesia for procedures on the eye; not otherwise specified	Anesthesia services that may be reported when general anesthesia or complex monitored anesthesia care is provided during the implant exchange.
`66540`	Iridotomy/iridectomy, surgical (separate procedure)	May be performed before or during implant manipulation to improve aqueous flow or access to the implant site when clinically indicated.
`66821`	Removal of foreign body, intraocular; anterior chamber (including removal of an implant or device)	May be used if removal of device components or additional intraocular debris is required separate from the exchange procedure.
`65899`	Unlisted procedure, anterior segment of eye	Used for additional anterior-segment procedures performed that do not have an exact CPT code when done in conjunction with the implant exchange.
`99024`	Postoperative follow-up visit, related to surgical aftercare (global period)	Reporting of significant, separately identifiable postoperative evaluation and management related to complications or extended care after the implant exchange.

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