Billing code 66740: Ciliary body ablationMedicare rate & RVUs in Oregon
Ophthalmologists report this procedure when an uncommon method is used to ablate ciliary tissue to reduce aqueous production in difficult-to-control glaucoma.
Medicare pays $438.54–$472.00 for 66740 in the office in Oregon, from Rest Of Oregon to Portland. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What 66740 covers
An ophthalmologist uses this procedure to ablate ciliary body tissue by a method not represented by the separately identified diathermy, transscleral laser, endoscopic laser, or cryotherapy options. Reducing aqueous humor production can lower intraocular pressure in glaucoma that remains difficult to control despite other treatment. It is generally performed as an operative eye procedure in a facility; CMS utilization shows facility services rather than office services for 2024.
Report the code when the operative documentation identifies the ciliary-body destruction method and supports that it is not one of the specifically coded techniques. Record the treated eye, indication, and operative details; laterality supports bilateral reporting. This major surgery code carries a 90-day global period, including the day before surgery and 90 days of related postoperative care. For bilateral procedures, modifier 50 is paid at 150%. In same-session multiple procedures, the highest-valued procedure is paid in full and additional procedures at 50%. Medicare does not pay an assistant at surgery for this code; 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.
Where 66740 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland | $472.00 | $351.77 |
| Rest Of Oregon | $438.54 | $330.76 |
How the 66740 rate is calculated
Each of 66740’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.
How the rate is built · 66740
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 5.01Practice expense 7.87Malpractice 0.40
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 66740
66740 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 66740
Ciliary body ablation
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 090 | Major surgery: the day before, the day of, and 90 days after are included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| Assistant at surgery (80/81/82/AS) | 1 | Not paid (statutory restriction). |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
| Split (54/55/56) | 0.10/0.70/0.20 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 66740
Ciliary body ablation
90-day global period ends
Dec 30, 2026
Covers Sep 30, 2026 through Dec 30, 2026 (92 days, including the day before surgery).
Visit on Oct 31, 2026
Day 30 of the 90-day post-op period: related follow-up care is included in the surgical payment.
Pre-op dayGlobal period
What modifiers do to the payment
Modifier 50 · payment effect
With and without the modifier
66740 without 50 · national office
$443.56
Ciliary body ablation
66740-50 · Bilateral: 150%
$665.34
Both sides on one line with modifier 50 are paid at 150% of the fee schedule amount (subject to multiple-procedure rules with other procedures).
66740 compared with similar codes
Compare codes
66740 vs 66710 vs 66711 vs 66720: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 66710Ciliary body treatment
- Use 66710 when the documented method is transscleral cyclophotocoagulation. This code is for another destruction method not represented by a specific technique code.
- 66711Endoscopic cyclophotocoagulation
- Use 66711 for endoscopic cyclophotocoagulation of the ciliary body. Choose this code only when the documented method is a different, otherwise-unspecified destruction technique.
- 66720Ciliary body destruction
- Use 66720 when ciliary-body destruction is performed with cryotherapy. This code describes a method outside that specifically identified technique.
66740 billing questions
When should this code be selected instead of another ciliary-body destruction code?
Yes. The global period includes the day before surgery and 90 days of related postoperative care.
How is a bilateral procedure reported?
Report modifier 50 for bilateral treatment; CMS pays the bilateral procedure at 150%.
How does the multiple-procedure reduction work?
When procedures subject to the rule are performed in the same session, the highest-valued procedure is paid in full and the others at 50%.
Can an assistant or co-surgeon be reported?
Medicare does not pay an assistant at surgery for this code. Co-surgeons and team surgery are not permitted.
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
Show the CMS file lines behind this rate
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