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CPT code 66605: Iridectomy, corneoscleral section2026 Medicare rate & RVUs

Reports surgical removal of iris tissue through a corneoscleral section, with code selection based on the procedure performed and documented approach.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $926.54 for 66605 nationally in a facility.

Medicare rate · 66605

Iridectomy, corneoscleral section

Office or facility?

Work RVUs
13.86
Total RVUs
27.74
Global days
090

National rate · 2026

$926.54

Facility setting, before claim adjustments.

See every locality for 66605 →Billed by an NP, PA or therapist? →

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

Your location

Medicare pays by the payment locality where the service is performed.

On this page 10 sections
  1. Medicare rate
  2. What 66605 covers
  3. By payment locality
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Similar codes
  8. Related codes
  9. Billing questions
  10. Sources

What 66605 covers

An ophthalmic surgeon uses a corneoscleral section to remove iris tissue. The operative report should make clear that iris tissue was excised and describe the incision and extent of removal. This code distinguishes the corneoscleral-section procedure from codes for lesion removal and glaucoma-specific peripheral, sector, or total iridectomy procedures.

Report the service for the operation documented, not simply because iris tissue was handled during another eye procedure. The operative note should support the approach and the work performed. Medicare 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% multiple-procedure reduction. Bilateral reporting with modifier 50 is paid at 150%. 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 66605 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

66605 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$857.13
AlaskaUnavailable$1,169.09
ArizonaUnavailable$907.98
ArkansasUnavailable$848.42
Atlanta, GAUnavailable$942.21
Austin, TXUnavailable$947.98
Bakersfield, CAUnavailable$961.79
Baltimore area, MDUnavailable$973.87
Beaumont, TXUnavailable$885.52
Brazoria, TXUnavailable$918.25

66605 rates by state

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

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Local rates. Clear comparisons.

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

View every state and territory as a table
66605 office rate range by state
State / territoryOffice rate rangeLocalities
AKNo published base rate1
ALNo published base rate1
ARNo published base rate1
AZNo published base rate1
CANo published base rate29
CONo published base rate1
CTNo published base rate1
DCNo published base rate1
DENo published base rate1
FLNo published base rate3
GANo published base rate2
GUNo published base rate1
HINo published base rate1
IANo published base rate1
IDNo published base rate1
ILNo published base rate4
INNo published base rate1
KSNo published base rate1
KYNo published base rate1
LANo published base rate2
MANo published base rate2
MDNo published base rate3
MENo published base rate2
MINo published base rate2
MNNo published base rate1
MONo published base rate3
MSNo published base rate1
MTNo published base rate1
NCNo published base rate1
NDNo published base rate1
NENo published base rate1
NHNo published base rate1
NJNo published base rate2
NMNo published base rate1
NVNo published base rate1
NYNo published base rate5
OHNo published base rate1
OKNo published base rate1
ORNo published base rate2
PANo published base rate2
PRNo published base rate1
RINo published base rate1
SCNo published base rate1
SDNo published base rate1
TNNo published base rate1
TXNo published base rate8
UTNo published base rate1
VANo published base rate2
VINo published base rate1
VTNo published base rate1
WANo published base rate2
WINo published base rate1
WVNo published base rate1
WYNo published base rate1

How the 66605 rate is calculated

Each of 66605’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 · 66605

RVUs × geographic indexes × conversion factor

Office or facility?

Work13.86

13.86 RVUs× 1.000 GPCI

Practice expense12.77

12.77 RVUs× 1.000 GPCI

Malpractice1.11

1.11 RVUs× 1.000 GPCI

Adjusted RVUs

27.7400

Conversion factor

$33.4009

Medicare rate

$926.54

Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.

Payment rules and modifiers for 66605

66605 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 66605

Iridectomy, corneoscleral section

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)1Not paid (statutory restriction).
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 · 66605

Iridectomy, corneoscleral section

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

66605 without 50 · national facility

$926.54

Iridectomy, corneoscleral section

66605-50 · Bilateral: 150%

$1,389.81

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

66605 compared with similar codes

Compare codes · National

5 codes, side by side

Office or facility?

  • 66605

    Iridectomy, corneoscleral section13.86 wRVU

    Not priced

  • 66600

    Iris surgery, lesion removal9.87 wRVU

    Not priced

  • 66625

    Iridectomy, peripheral, for glaucoma5.17 wRVU

    Not priced

  • 66630

    Iris excision, non-glaucoma indication7.1 wRVU

    Not priced

  • 66635

    Iris removal, complete iridectomy7.19 wRVU

    Not priced

How to choose

66600Iris surgeryLesion removal
Choose 66600 when the surgeon removes an iris lesion. 66605 represents iris removal through a corneoscleral section without that lesion-removal distinction.
66625IridectomyPeripheral, for glaucoma
66625 is for a glaucoma-related peripheral iridectomy; 66605 describes removal through a corneoscleral section.
66630Iris excisionNon-glaucoma indication
66630 represents a glaucoma-related sector iridectomy. Use 66605 for the corneoscleral-section service when the documented procedure is not the sector glaucoma procedure.
66635Iris removalComplete iridectomy
66635 represents a glaucoma-related total iridectomy, while 66605 identifies the corneoscleral-section procedure.

Codes related to 66605

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

Codes related to 66605
CodeHow it relatesNational office range
Used instead
66600Iris surgery, lesion removalUse when iris removal includes excision of a lesion.No office rate
66680Iris repair, iris or ciliary bodyRepairs iris and ciliary body rather than reporting iris removal.No office rate
Same family
66625Iridectomy, peripheral, for glaucomaGlaucoma-related peripheral iridectomy.No office rate
66630Iris excision, non-glaucoma indicationGlaucoma-related sector iridectomy.No office rate
66635Iris removal, complete iridectomyGlaucoma-related total iridectomy.No office rate

66605 billing questions

How is 66605 distinguished from 66600?

66605 describes iris removal through a corneoscleral section. Use 66600 when the operation includes removal of an iris lesion.

How does 66605 differ from 66625, 66630, and 66635?

Those codes describe glaucoma-related peripheral, sector, or total iridectomy procedures. Select among them based on the documented glaucoma procedure and extent rather than using 66605 for those services.

What documentation supports 66605?

The operative report should identify the iris tissue removed and document the corneoscleral-section approach. It should also distinguish the service from lesion removal or a glaucoma-specific iridectomy.

Does the 90-day global period include related follow-up?

Yes. The day-before preoperative visit and 90 days of related postoperative care are included in the global period.

How is bilateral 66605 reported for Medicare?

Use modifier 50 for a bilateral procedure; CMS pays the bilateral service at 150%.

Can an assistant or co-surgeon be paid for 66605?

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
RVUs for 66605PPRRVU2026_Oct_nonQPP.csv, line 7,380 (RVU26D)

Open CMS sourceHow we calculate rates

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