CPT 66600 Iris Lesion Excision Reimbursement

CPT code 66600 represents surgical excision of an iris lesion with removal of part of the iris and potential excision of adjacent corneal or scleral tissue. This anterior segment ophthalmic procedure is used to treat suspicious or symptomatic iris lesions and has implications for procedural coding, payer coverage, and perioperative resource planning nationwide. The code matters nationally because it defines a discrete surgical service that affects facility utilization, surgeon billing, and specialty-specific payment policies.

Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context for the procedure, typical sites of service such as hospital operating rooms and ambulatory surgical centers, and which payers commonly cover such services. The publication outlines what stakeholders can expect to learn: national billing benchmarks where available, relevant policy considerations for coverage and prior authorization, and clinical context tying the code to anterior segment ophthalmic surgery. Data not available in the input is noted where applicable, including specific diagnosis pairings and payer-specific reimbursement rates. The content is intended for coders, billing managers, clinical leaders, and policy analysts seeking a clear national summary of CPT code 66600 and its role in ophthalmic surgical care.

Billing Code Overview

CPT code 66600 describes a surgical procedure in which a provider excises a lesion involving the iris by removing part of the iris and may include removal of adjacent corneal and/or scleral tissue. This procedure is an ocular anterior segment surgery focused on lesion excision from the iris.

Service type: Surgical excision of iris lesion (anterior segment ophthalmic surgery)
Typical site of service: Hospital operating room or ambulatory surgical center (ocular surgery suite)

Data not available in the input for associated taxonomies, ICD-10 diagnoses, related codes, and detailed payer-specific coverage rules.

Clinical Context

A 62-year-old patient presents to a tertiary ophthalmology clinic with a pigmented, elevated lesion on the peripheral iris causing visual disturbance and intermittent angle obstruction. After clinical examination, slit-lamp photography, gonioscopy, and anterior segment OCT, the ophthalmologist recommends surgical excision of the iris lesion with partial removal of adjacent corneal or scleral tissue to obtain diagnostic histopathology and relieve symptoms.

Preoperative workflow includes informed consent, medical clearance, topical and/or periocular anesthesia, and marking of the surgical site. In the operating room or procedure suite, the surgeon performs an anterior segment procedure under an operating microscope: creating a limbal or corneal incision, excising the iris lesion with scissors or punch, and removing a limited adjacent segment of cornea or sclera if the lesion extends to those structures. Hemostasis and reconstruction of the iris and wound closure follow. Excised tissue is submitted for pathology. Postoperative care includes topical antibiotics and corticosteroids, intraocular pressure monitoring, and follow-up visits at postoperative day 1, week 1, and month 1 to monitor healing and visual function.

Typical site of service: hospital outpatient operating room or ambulatory surgery center. Service type: surgical, ophthalmologic anterior segment excision with partial removal of iris and adjacent cornea/sclera. Typical providers: ophthalmic surgeon specialized in ocular oncology or anterior segment surgery, supported by operating room nursing and anesthesia services.

Coding Specifications

Modifier	Description	When to Use

Taxonomy Code	Specialty	Notes
207W00000X	Ophthalmology	Most common specialty performing anterior segment excisions and iris tumor surgery.
207WP2900X	Ocular Oncology	Subspecialty focusing on neoplastic lesions of the eye; frequently performs iris lesion excisions.
207WH0002X	Corneal and External Disease	Corneal surgeons perform procedures involving cornea and limbus when lesion involves corneal tissue.
208000000X	General Surgery	Occasionally involved when multidisciplinary surgical planning or complex orbital involvement exists.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`D31.89`	Benign neoplasm of other specified eye structures	Iris nevi or benign iris tumors that may require excision for diagnosis or symptom relief.
`D44.4`	Neoplasm of uncertain behavior of eye, adnexa, and orbit	Lesions with uncertain malignant potential where excision and pathology determine behavior.
`C69.2`	Malignant neoplasm of iris and ciliary body	Primary iris melanoma or malignant lesions requiring excision for oncologic control.
`H21.0`	Hyphema	Associated anterior segment bleeding that may complicate or result from iris lesions; surgical excision may be required if associated with a mass.
`H01.9`	Unspecified disorder of eyelid and periocular area	Included when peri-limbal or scleral involvement affects adjacent tissues and requires combined management.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`66982`	Complex cataract surgery, requiring devices, vitreous loss, or complicated management	May be performed concurrently if cataract extraction is required or cataract is present and complicates anterior segment access.
`67121`	Repair of retinal detachment; complex procedures	May be relevant if posterior segment complications occur or combined procedures become necessary.
`65220`	Excision of lesion of conjunctiva, simple; single	Performed if conjunctival extension of the iris lesion requires excision of conjunctiva in addition to iris tissue.
`65435`	Removal of corneal foreign body, with or without slit lamp; simple	Relevant when corneal involvement requires debridement or superficial corneal tissue removal.
`66999`	Unlisted procedure, anterior segment	Used when an anterior segment excisional procedure of atypical extent does not fit an existing CPT and a narrative is required.

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Summary & Overview

CPT 66600: Excision of Iris Lesion, Anterior Segment Surgery