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Billing code 66683: Iris prosthesisMedicare rate & RVUs

Reports surgical placement of an artificial iris to address substantial iris loss or deficiency, such as after ocular trauma or with congenital aniridia.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $661.00 for 66683 nationally in a facility.

Medicare rate · 66683

Iris prosthesis

Swap in your local Medicare rate.

Work RVUs
10.4
Total RVUs
19.79
Global days
090

National rate · 2026

$661.00

Facility setting, before claim adjustments.

See every locality for 66683 → · 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.

On this page 10 sections
  1. Medicare rate
  2. What 66683 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 66683 covers

An ophthalmologist places a prosthetic iris inside the eye to address significant iris tissue loss or deficiency. Typical situations include traumatic loss of iris tissue or congenital aniridia causing symptoms such as glare or light sensitivity. The procedure is performed in an operating room; the surgeon positions the prosthesis and uses fixation when needed. This code is for implanting a prosthetic iris, rather than repairing or removing native iris tissue.

Report the service when the operative documentation supports implantation of an iris prosthesis, including the indication, eye treated, and placement or fixation performed. The service has a 90-day global period, which includes the day-before preoperative visit and 90 days of related postoperative care. For multiple procedures 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 is restricted; 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 66683 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

66683 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$613.23
Alaska*Unavailable$840.83
ArizonaUnavailable$648.15
ArkansasUnavailable$607.24
AtlantaUnavailable$672.19
AustinUnavailable$675.12
BakersfieldUnavailable$684.21
Baltimore/Surr. CntysUnavailable$694.00
BeaumontUnavailable$633.30
BrazoriaUnavailable$655.11

66683 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
66683 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 66683 rate is calculated

Each of 66683’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 · 66683

RVUs × geographic indexes × conversion factor

Swap in your local Medicare rate.

Work 10.40Practice expense 8.56Malpractice 0.83

19.7900 adjusted RVUs×$33.4009 conversion factor=$661.00

All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.

Payment rules and modifiers for 66683

66683 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 66683

Iris prosthesis

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 · 66683

Iris prosthesis

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.

  • 24 Unrelated E/M visit by the same physician
  • 79 Unrelated procedure (starts its own global period)
  • 58 Staged, more extensive, or therapy procedure that was planned
  • 78 Unplanned 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

66683 without 50 · national facility

$661.00

Iris prosthesis

66683-50 · Bilateral: 150%

$991.50

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

66683 compared with similar codes

Compare codes

66683 vs 66682 vs 66680 vs 66605: national Medicare rates

Swap in your local Medicare rate.

  • 66683
    Iris prosthesis · 10.4 wRVU
    —
  • 66682
    Iris repair · 8.52 wRVU
    —
  • 66680
    Iris repair · 7.77 wRVU
    —
  • 66605
    Iridectomy · 13.86 wRVU
    —

How to choose

66682Iris repair
66683 is for implanting a prosthetic iris. 66682 is a repair procedure for native iris or ciliary body tissue.
66680Iris repair
Choose 66683 when an artificial iris is implanted; 66680 describes repair of the iris or ciliary body rather than prosthetic replacement.
66605Iridectomy
66605 is an iris removal procedure. It does not describe implantation of a prosthetic iris to address iris deficiency.

Codes related to 66683

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

Codes related to 66683
CodeHow it relatesNational office range
Used instead
66682Iris repairRepair of native iris or ciliary body tissue rather than implantation of a prosthetic iris.No office rate
66680Iris repairIris and ciliary body repair when native tissue is repaired instead of replaced with a prosthesis.No office rate
Often billed with
66982Cataract surgeryMay be reported for separately performed complex cataract surgery during the same session.No office rate
66984Cataract surgeryMay accompany separately performed routine cataract surgery in the same session.No office rate

66683 billing questions

When should 66683 be chosen instead of an iris repair code?

Use 66683 when a prosthetic iris is implanted. A procedure that repairs native iris or ciliary body tissue without prosthesis implantation points to a repair code such as 66682.

Does 66683 include fixation of the prosthesis?

The procedure includes fixation when performed. The operative report should describe the prosthesis placement and any fixation used.

Can cataract surgery be reported during the same session?

A separately performed cataract operation may be reported when supported by the operative record. The multiple-procedure reduction applies when multiple procedures are performed in the same session.

How is bilateral implantation reported?

For bilateral procedures, report modifier 50; CMS pays the bilateral procedure at 150%.

What postoperative care is included?

The 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 paid for this procedure?

Assistant-at-surgery payment is subject to a statutory restriction. 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 66683PPRRVU2026_Oct_nonQPP.csv, line 7,386 (RVU26D)

Open CMS sourceHow we calculate rates

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