CPT code 66700: Ciliary body destruction, diathermy2026 Medicare rate & RVUs in Florida
Ophthalmologists report this procedure when using diathermy to destroy ciliary body tissue, typically as a cyclodestructive treatment for glaucoma.
Medicare pays $451.17–$488.33 for 66700 in the office in Florida, from Rest of Florida to Miami, FL. 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.
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On this page 9 sections
What 66700 covers
An ophthalmologist uses diathermy to destroy targeted ciliary body tissue, reducing aqueous humor production. This cyclodestructive procedure may be used for glaucoma that remains difficult to control, including when other pressure-lowering approaches have not achieved the clinical goal. It is generally performed in an operating room or other surgical setting, rather than as a routine office procedure.
Select this code when the operative method is diathermy; other ciliary body destruction methods have separate codes. The operative report should identify the treated eye, indication, and technique performed. CMS assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures occur 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 requires documented medical necessity; 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 66700 pays more and less in Florida
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
3 payment localities
$451.17 to $488.33
| Payment locality | Office | Facility |
|---|---|---|
| Fort Lauderdale, FL | $470.97 | $348.15 |
| Miami, FL | $488.33 | $362.11 |
| Rest of Florida | $451.17 | $335.26 |
How the 66700 rate is calculated
Each of 66700’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 · 66700
RVUs × geographic indexes × conversion factor
Work5.01
5.01 RVUs× 1.000 GPCI
Practice expense8.26
8.26 RVUs× 1.000 GPCI
Malpractice0.40
0.40 RVUs× 1.000 GPCI
Adjusted RVUs
13.6700
Conversion factor
$33.4009
Medicare rate
$456.59
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 66700
66700 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 66700
Ciliary body destruction, diathermy
| 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) | 0 | Not paid without supporting documentation. |
| 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 · 66700
Ciliary body destruction, diathermy
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
66700 without 50 · national office
$456.59
Ciliary body destruction, diathermy
66700-50 · Bilateral: 150%
$684.89
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).
66700 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 66710Ciliary body treatmentTransscleral laser
- Use 66710 for transscleral cyclophotocoagulation. This code is for diathermy destruction of the ciliary body.
- 66711Endoscopic cyclophotocoagulationCiliary body destruction
- Use 66711 when endoscopic cyclophotocoagulation is performed. This code describes the diathermy method.
- 66720Ciliary body destructionCyclocryotherapy
- Use 66720 for ciliary body destruction by cryotherapy; choose this code when diathermy is the documented technique.
66700 billing questions
How is this code distinguished from other ciliary body destruction codes?
Use this code when the operative technique is diathermy. Transscleral or endoscopic cyclophotocoagulation and cryotherapy have separate codes.
What should the operative note document?
Document the glaucoma indication, treated eye, and that diathermy was used to destroy ciliary body tissue.
How is bilateral treatment reported?
Report bilateral treatment with modifier 50; CMS pays the bilateral procedure at 150%.
Does the code include postoperative visits?
Yes. Its 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
Can an assistant surgeon or co-surgeon be reported?
Assistant-at-surgery payment is available only when medical necessity is documented. Co-surgeons and team surgery are not permitted.
What happens when another procedure is performed in the same session?
The highest-valued procedure is paid in full, and other procedures are subject to the standard multiple-procedure reduction.
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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