CPT code 92133: Optic nerve OCT, posterior segment, optic nerve2026 Medicare rate & RVUs

Medicare pays $30.73 for 92133 nationally in the office. Local office rates run $27.58–$40.38.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 92133 covers

This test uses computerized scanning, most often optical coherence tomography, to assess the optic nerve head and retinal nerve fiber layer thickness; it may also assess macular ganglion cells. Ophthalmologists and optometrists use it in office and hospital outpatient eye clinics for glaucoma suspects, established glaucoma, ocular hypertension, and optic neuropathies. A technician captures the scans, and the interpreting clinician evaluates their quality and findings, comparing results with prior studies when available.

Report one unit whether one or both eyes are scanned. The code is already priced as bilateral, so modifier 50 does not increase payment. Document an interpretation and report with findings relevant to the optic nerve assessment. Billing without a modifier represents the global service; append modifier 26 when billing only the interpretation or TC when billing only equipment and staff services. When multiple eligible ophthalmic diagnostic tests are performed, Medicare's ophthalmic diagnostic multiple procedure reduction affects lower-valued technical components, not the professional interpretations. Use a different code when retinal or macular imaging is the clinical focus.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

Where 92133 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

92133 rates by state

Office rate range in each state. Select a state to see its payment localities.

How the 92133 rate is calculated

Each of 92133’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 92133

The CMS indicators that decide how 92133 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

92133 compared with similar codes

How to choose

92134Retinal OCTPosterior segment, retina

92133 is for optic nerve and nerve fiber layer analysis, typically for glaucoma; 92134 is for retinal and macular analysis, such as macular degeneration or diabetic edema. They are not reported together at the same encounter.

92137OCT angiographyPosterior segment retinal imaging

92137 is retinal imaging that includes OCT angiography of retinal vasculature; 92133 assesses optic nerve structure without angiography.

92132Eye imagingAnterior segment

92132 images the anterior segment, such as the angle or cornea; 92133 images the optic nerve in the posterior segment.

92250Fundus photographyRetinal photos with interpretation

92250 is fundus photography producing images of the retina and disc; 92133 provides quantitative scanning measurements of nerve fiber layer thickness.

Codes related to 92133

Related codes aren’t interchangeable: bill the code that matches the service performed.

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates