Summary & Overview
CPT 67320: Extraocular Muscle Transposition Surgery
CPT code 67320 is an add-on ophthalmic surgical code for transposition of extraocular muscles to correct ocular misalignment and improve visual function. Nationally, this code is used in specialty ophthalmic surgical practices and hospital settings where strabismus or other motility disorders require muscle transposition techniques. Accurate coding of 67320 matters for clinical documentation, surgical planning, and consistent reporting of complex eye muscle procedures.
Key payers in the national analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides comparative benchmarks where available, clarifies clinical context for use of the code, and summarizes coding relationships and billing considerations relevant to ophthalmology surgical service lines.
Readers will learn the clinical intent of the code, typical sites of service, common procedural context in which the add-on transposition is reported, and which payers are included in the coverage overview. Data not available in the input is indicated explicitly where applicable.
Billing Code Overview
CPT code 67320 describes an add-on surgical procedure in which the provider performs a transposition of one or more extraocular muscles to correct ocular misalignment and improve the patient’s vision. This procedure involves repositioning an extraocular muscle to change its mechanical action on the eye.
-
Service type: Surgical, ophthalmic extraocular muscle transposition (add-on procedure)
-
Typical site of service: Ambulatory surgical center or hospital operating room
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult or pediatric ophthalmology patient with symptomatic ocular misalignment (strabismus) causing diplopia, abnormal head posture, or amblyopia risk. The patient presents after comprehensive evaluation including visual acuity, ocular motility testing, cover/uncover and prism testing, and measurement of deviation in prism diopters. Imaging is rarely required unless restrictive or neurologic causes are suspected. The clinical workflow includes preoperative informed consent, preoperative marking and planning of which extraocular muscle(s) require transposition, general or monitored anesthesia care, operative muscle dissection and transposition (with possible adjustable sutures), intraoperative assessment of alignment, and postoperative follow-up to assess alignment and vision. Typical site of service is an ambulatory surgery center or hospital outpatient surgical suite. The procedure is performed by ophthalmologists with training in pediatric ophthalmology or strabismus surgery and is billed as an add-on procedure when performed in conjunction with a primary strabismus operation.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default/No modifier | Standard reporting when no specific modifier applies |
51 |