CPT code 66183: Drainage device, without extraocular reservoir2026 Medicare rate & RVUs in Oxnard, CA

In Oxnard, CA, Medicare pays $956.26 for 66183 in a facility. There’s no office rate.

Check a contract rate as a % of Medicare · 66183 nationwide

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

What 66183 covers

An ophthalmic surgeon places a small drainage device through the eye wall to direct aqueous humor from the anterior chamber toward the subconjunctival space. The procedure is used to lower intraocular pressure in patients with glaucoma when a drainage pathway is selected as the surgical treatment. It differs from a plate shunt because the device does not use an extraocular reservoir. The service is generally performed in an operating room or other surgical setting by an ophthalmologist.

Report the code for the external approach and document the glaucoma indication, operative approach, device placement, and the absence of an extraocular reservoir. CMS assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% reduction. Bilateral reporting with modifier 50 is paid at 150%. Assistant-at-surgery payment may be allowed; co-surgeons and team surgery are not permitted.

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.

How Oxnard, CA compares for 66183

Across 109 of 109 payment localities, the facility rate for 66183 runs from $805.83 in Arkansas to $1,107.88 in Alaska. Oxnard, CA pays $956.26. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

66183 rates by state

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

See 66183 in every payment locality

How the 66183 rate is calculated

Each of 66183’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 66183

66183 has a 90-day global period: related visits in that window are included in the surgery payment.

What modifiers do to the payment

When to use modifier 50

Codes related to 66183

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

How 66183 has changed in Oxnard, CA

Price 66183 for an earlier date of service

Where the Oxnard, CA rate applies

Oxnard, CA is a Medicare payment area, not a city. Our Census mapping connects it to 26 cities and communities in California. Some span more than one payment area; confirm with the service ZIP.

• Oxnard
• Thousand Oaks
• Bell Canyon
• Camarillo
• Casa Conejo
• Channel Islands Beach
• El Rio
• Fillmore

Browse all communities in California

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