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or ZIP

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Switch every figure between Medicare dollars and work RVUs.

Conversion factor

Modifiers

66184

Revision of aqueous shunt

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Code typePrimary

Payment statusActive (A)

Global period90-day

Whole-Procedure Pricing

Line

Qty

Global fee

Pro fee

Primary66184Revision of aqueous shunt

$686.72

RVU Breakdown

Component

Office

Facility

Work

9.34

Practice expense

10.47

Malpractice

0.75

Total RVU

20.56

Payment Policy & Modifiers

Allowed adjustments

Bilateral -50150%

With modifier 50 (both sides), payment is 150% of the single-side amount. → $1,030.08 office.

Multiple procedure MPPRApplies

When billed with other procedures the same day: highest-valued paid 100%, the rest 50%.

Assistant surgeon -80/81/8216%

Assistant at surgery (mod 80/81/82) is paid at 16% of the fee schedule amount.

Not applicable to this code

Co-surgeon -62Team surgeon -66Prof / tech split

Global surgery package

Major surgery: payment covers the day before, the day of, and 90 days after. Of the total payment, 10% is attributed to pre-operative care, 70% to the procedure itself, and 20% to post-operative visits.

In plain English

Office vs. facility

Where the service happens. In your own clinic (office), Medicare also pays you for the room, staff and supplies — so it's higher. In a hospital or ASC, the facility bills that part separately.

wRVU

Work Relative Value Units — the physician-effort share of a code. Most employment contracts pay a set dollar amount per wRVU, independent of Medicare's rate.

Add-on codes

Billed only alongside a primary code. Use the steppers to add units — extra levels, leads or sides — to the whole-procedure total.

Conversion factor

The dollars-per-RVU Medicare multiplies by. Set once, it flows through every figure on this page. The QP rate applies to clinicians who qualify as Advanced APM participants — a small annual boost.

GPCI

Geographic Practice Cost Index — adjusts the work, practice-expense and malpractice RVUs for your locality's cost of living before they're multiplied by the conversion factor.

How payment is computed

Each RVU is scaled by your locality's GPCI, summed, then multiplied by the conversion factor:

(work·wGPCI
+ PE·peGPCI
+ MP·mpGPCI) × CF

This code's Global fee

(9.34·1.000
+ 10.47·1.000
+ 0.75·1.000) × $33.40 = $686.72

Full methodology — how we apply CMS's rules →