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CPT code 66700: Ciliary body destruction, diathermy2026 Medicare rate & RVUs in Connecticut

Ophthalmologists report this procedure when using diathermy to destroy ciliary body tissue, typically as a cyclodestructive treatment for glaucoma.

CMS RVU26DEffective Oct 1, 2026One payment locality21 Medicare services in 2024

In Connecticut, Medicare pays $483.99 for 66700 in the office and $353.41 when it’s performed in a hospital or facility.

$483.99Office (non-facility)
$353.41Hospital or facility
+6.0%vs the national office rate ($456.59)

Check a contract rate as a % of Medicare · 66700 nationwide

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

We’ll open 66700 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Connecticut
  2. What 66700 covers
  3. Compared with other areas
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Related codes
  8. Rate history
  9. Where it applies
  10. Billing questions
  11. Sources

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.

How Connecticut compares for 66700

Across 109 of 109 payment localities, the office rate for 66700 runs from $411.21 in Arkansas to $590.74 in San Benito County, CA. Connecticut pays $483.99. The RVUs are the same everywhere; the geographic indexes change the dollars.

66700 in Connecticut vs other payment areas
  1. Connecticut · this page$483.99
  2. Los Angeles, CA · California$509.45+$25.46
  3. Washington, DC area · District of Columbia$516.24+$32.25
  4. Miami, FL · Florida$488.33+$4.34
  5. Chicago, IL · Illinois$476.44−$7.55
  6. Manhattan, NY · New York$519.82+$35.83
  7. Alaska · Alaska$552.19+$68.20

Other areas in Connecticut first, then benchmark localities. Bars start at $0.

Every other payment area

66700 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$416.31$310.22
ArkansasArkansas$411.21$307.06
ArizonaArizona$446.11$328.63
Bakersfield, CACalifornia$481.03$348.15
Chico, CACalifornia$479.72$346.84
El Centro, CACalifornia$479.79$346.90
Fresno, CACalifornia$479.72$346.84
Hanford, CACalifornia$479.72$346.84

66700 rates by state

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

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

$411.21

$552.19

Color shows the midpoint of each state’s locality range.

View every state and territory as a table
66700 office rate range by state
State / territoryOffice rate rangeLocalities
AK$552.191
AL$416.311
AR$411.211
AZ$446.111
CA$479.72–$590.7429
CO$473.331
CT$483.991
DC$516.241
DE$452.771
FL$451.17–$488.333
GA$429.36–$464.192
GU$488.761
HI$488.761
IA$425.081
ID$427.481
IL$440.11–$476.444
IN$429.581
KS$423.481
KY$424.831
LA$424.30–$442.132
MA$471.18–$515.502
MD$460.48–$516.243
ME$429.47–$449.182
MI$434.31–$456.102
MN$455.191
MO$418.17–$443.373
MS$414.751
MT$456.561
NC$433.281
ND$448.651
NE$427.041
NH$466.231
NJ$489.96–$512.182
NM$436.381
NV$454.641
NY$438.83–$530.895
OH$432.691
OK$424.091
OR$451.52–$486.472
PA$433.23–$473.492
PR$459.421
RI$467.431
SC$433.621
SD$447.721
TN$425.301
TX$430.81–$471.408
UT$438.671
VA$447.97–$516.242
VI$459.421
VT$447.231
WA$470.19–$525.142
WI$435.761
WV$426.211
WY$453.121

See 66700 in every payment locality

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

Office or facility?

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.

The exact Connecticut inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

7,387

Code
66700
Physician work
5.01
Practice expense
8.26
Malpractice
0.40

GPCI2026.csv

38

Locality
Connecticut
Physician work
1.020
Practice expense
1.077
Malpractice
1.210
Office calculation for 66700 in Connecticut
ComponentRVULocality factorAdjusted
Physician work5.01× 1.0205.1102
Practice expense8.26× 1.0778.8960
Malpractice0.40× 1.2100.4840
Total RVUs14.4902
Conversion factor× 33.4009

Office rate, Connecticut$483.99

Office: (5.01 × 1.02 + 8.26 × 1.077 + 0.4 × 1.21) × $33.4009 = $483.99

Facility: (5.01 × 1.02 + 4.63 × 1.077 + 0.4 × 1.21) × $33.4009 = $353.41

Open 66700 in the RVU calculator

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

RuleCMS valueWhat it means
Global period090Major surgery: the day before, the day of, and 90 days after are included.
Multiple procedures2Standard reduction: highest-valued procedure at 100%, others at 50%.
Bilateral (modifier 50)1Bilateral with modifier 50 pays 150% of the fee schedule amount.
Assistant at surgery (80/81/82/AS)0Not paid without supporting documentation.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.
Split (54/55/56)0.10/0.70/0.20Share 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.

  • 24Unrelated E/M visit by the same physician
  • 79Unrelated procedure (starts its own global period)
  • 58Staged, more extensive, or therapy procedure that was planned
  • 78Unplanned return to the operating room for a related complication
SurgeryVisit
Sep 23, 2026Jan 10, 2027

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).

When to use modifier 50

Codes related to 66700

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

Codes related to 66700
CodeHow it relatesOffice range, Connecticut
Same family
66710Ciliary body treatment, transscleral laserRelated ciliary body destruction procedure using transscleral cyclophotocoagulation.$471.76
66711Endoscopic cyclophotocoagulation, ciliary body destructionRelated ciliary body destruction procedure using endoscopic cyclophotocoagulation.No office rate
66720Ciliary body destruction, cyclocryotherapyRelated ciliary body destruction procedure using cryotherapy.$502.92

How 66700 has changed in Connecticut

66700 · Office / nonfacility

$483.99

Effective 2026-10-01

The base rate is $19.31 higher than on 2025-10-01, moving from $464.68 to $483.99 (4.2%).

It is unchanged from the immediately preceding available release, effective 2026-07-01.

Base rate by release · bars start at $0 · select a bar to compare

One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.

What changed, release by release

  1. January 1, 2026

    RVU26A

    $464.68changed to$483.99

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 5.14 changed to 5.01
    • Practice expense RVU 7.91 changed to 8.26
    • Work GPCI 1.022 changed to 1.020
    • Practice expense GPCI 1.091 changed to 1.077
    • Malpractice GPCI 1.207 changed to 1.210

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $480.74changed to$464.68

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 7.98 changed to 7.91

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $472.89changed to$480.74

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $486.33changed to$472.89

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 7.85 changed to 7.98
    • Malpractice RVU 0.38 changed to 0.40
    • Work GPCI 1.030 changed to 1.022
    • Practice expense GPCI 1.102 changed to 1.091
    • Malpractice GPCI 1.070 changed to 1.207

  5. January 1, 2023

    RVU23A

    $491.92changed to$486.33

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 7.64 changed to 7.85
    • Malpractice RVU 0.40 changed to 0.38
    • Work GPCI 1.037 changed to 1.030
    • Practice expense GPCI 1.114 changed to 1.102
    • Malpractice GPCI 0.934 changed to 1.070

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $495.28changed to$491.92

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 7.63 changed to 7.64
    • Malpractice RVU 0.39 changed to 0.40

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $498.70changed to$495.28

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 7.28 changed to 7.63
    • Work GPCI 1.029 changed to 1.037
    • Practice expense GPCI 1.113 changed to 1.114
    • Malpractice GPCI 1.094 changed to 0.934

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $500.47changed to$498.70

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 7.34 changed to 7.28
    • Malpractice RVU 0.38 changed to 0.39
    • Work GPCI 1.021 changed to 1.029
    • Practice expense GPCI 1.112 changed to 1.113
    • Malpractice GPCI 1.255 changed to 1.094

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $500.67changed to$500.47

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 7.37 changed to 7.34
    • Malpractice RVU 0.37 changed to 0.38

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $495.06changed to$500.67

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 7.23 changed to 7.37
    • Work GPCI 1.023 changed to 1.021
    • Practice expense GPCI 1.117 changed to 1.112
    • Malpractice GPCI 1.244 changed to 1.255

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $494.56changed to$495.06

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 7.22 changed to 7.23
    • Work GPCI 1.024 changed to 1.023
    • Practice expense GPCI 1.121 changed to 1.117
    • Malpractice GPCI 1.232 changed to 1.244

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $495.94changed to$494.56

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 7.21 changed to 7.22

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $493.47changed to$495.94

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $497.17changed to$493.47

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 7.20 changed to 7.21
    • Malpractice RVU 0.47 changed to 0.37
    • Practice expense GPCI 1.116 changed to 1.121
    • Malpractice GPCI 1.234 changed to 1.232

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $496.88changed to$497.17

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 7.87 changed to 7.20
    • Malpractice RVU 0.49 changed to 0.47
    • Practice expense GPCI 1.110 changed to 1.116
    • Malpractice GPCI 1.235 changed to 1.234

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $496.88

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$483.99$353.41RVU26D
2026-07-01$483.99$353.41RVU26C
2026-04-01$483.99$353.41RVU26B
2026-01-01$483.99$353.41RVU26A
2025-10-01$464.68$400.80RVU25D
2025-07-01$464.68$400.80RVU25C
2025-04-01$464.68$400.80RVU25B
2025-01-01$464.68$400.80RVU25A
2024-10-01$480.74$412.83RVU24D
2024-07-01$480.74$412.83RVU24C
2024-04-01$480.74$412.83RVU24B
2024-03-09$480.74$412.83RVU24AR
2024-01-01$472.89$406.09RVU24A
2023-10-01$486.33$416.50RVU23D
2023-07-01$486.33$416.50RVU23C
2023-04-01$486.33$416.50RVU23B
2023-01-01$486.33$416.50RVU23A
2022-10-01$491.92$420.60RVU22D
2022-07-01$491.92$420.60RVU22C
2022-04-01$491.92$420.60RVU22B
2022-01-01$491.92$420.60RVU22A
2021-10-01$495.28$422.59RVU21D
2021-07-01$495.28$422.59RVU21C
2021-04-01$495.28$422.59RVU21B
2021-01-01$495.28$422.59RVU21A
2020-10-01$498.70$429.61RVU20D
2020-07-01$498.70$429.61RVU20C
2020-04-01$498.70$429.61RVU20B
2020-01-01$498.70$429.61RVU20A
2019-10-01$500.47$432.74RVU19D
2019-07-01$500.47$432.74RVU19C
2019-04-01$500.47$432.74RVU19B
2019-01-01$500.47$432.74RVU19A
2018-10-01$500.67$434.22RVU18D
2018-07-01$500.67$434.22RVU18C
2018-04-01$500.67$434.22RVU18B
2018-01-01$500.67$434.22RVU18AR1
2017-10-01$495.06$431.32RVU17D
2017-07-01$495.06$431.32RVU17C
2017-04-01$495.06$431.32RVU17B
2017-01-01$495.06$431.32RVU17A
2016-10-01$494.56$430.74RVU16D
2016-07-01$494.56$430.74RVU16C
2016-04-01$494.56$430.74RVU16B
2016-01-01$494.56$430.74RVU16A
2015-10-01$495.94$431.49RVU15D
2015-07-01$495.94$431.49RVU15C
2015-04-01$493.47$429.34RVU15B
2015-01-01$493.47$429.34RVU15A
2014-10-01$497.17$434.40RVU14D
2014-07-01$497.17$434.40RVU14C
2014-04-01$497.17$434.40RVU14B
2014-01-01$497.17$434.40RVU14A
2013-10-01$496.88$430.79RVU13D
2013-07-01$496.88$430.79RVU13C
2013-04-01$496.88$430.79RVU13B
2013-01-01$496.88$430.79RVU13AR

Price 66700 for an earlier date of service

Where the Connecticut rate applies

Connecticut is a Medicare payment area, not a city. Our Census mapping connects it to 215 cities and communities in Connecticut. Some span more than one payment area; confirm with the service ZIP.

  • Ansonia
  • Ball Pond
  • Baltic
  • Bantam
  • Bethel
  • Bethlehem Village
  • Bigelow Corners
  • Blue Hills

Browse all communities in Connecticut

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
RVUs for 66700PPRRVU2026_Oct_nonQPP.csv, line 7,387 (RVU26D)
Geographic factors for ConnecticutGPCI2026.csv, line 38 (RVU26D)

Open CMS sourceHow we calculate rates

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