CPT code 15821: Lower eyelid surgery, prominent fat-pad prolapse2026 Medicare rate & RVUs in Barrington, Illinois
CPT 15821: $663.13–$665.91 office ($508.42–$514.52 facility) across 2 localities in Barrington, IL in 2026 Medicare. Compare each area.
Medicare pays $663.13–$665.91 for 15821 in the office in Barrington, Illinois, from Suburban Chicago, IL to Chicago, IL. 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.
On this page 6 sections
Where 15821 pays more and less in Barrington, Illinois
Barrington, Illinois maps to 2 Medicare payment localities in our Census-to-CMS crosswalk. A city name alone doesn’t confirm an address’s payment area.
| Payment locality | Office | Facility |
|---|---|---|
| Chicago, IL | $665.91 | $514.52 |
| Suburban Chicago, IL | $663.13 | $508.42 |
How payment areas work in Barrington
City limits and Medicare payment areas are different maps. These are the payment areas that cover the city’s counties; the service ZIP decides which one applies.
- Chicago · Cook County
- Suburban Chicago · Lake County
City boundaries: 2026 Census geography · Census source · CMS county-to-locality definitions
How the 15821 rate is calculated
Each of 15821’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 · 15821
RVUs × geographic indexes × conversion factor
Work6.67
6.67 RVUs× 1.000 GPCI
Practice expense11.67
11.67 RVUs× 1.000 GPCI
Malpractice0.65
0.65 RVUs× 1.000 GPCI
Adjusted RVUs
18.9900
Conversion factor
$33.4009
Medicare rate
$634.28
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 15821
15821 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 15821
Lower eyelid surgery, prominent fat-pad prolapse
| 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) | 0.10/0.71/0.19 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 15821
Lower eyelid surgery, prominent fat-pad prolapse
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
15821 without 50 · national office
$634.28
Lower eyelid surgery, prominent fat-pad prolapse
15821-50 · Bilateral: 150%
$951.42
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).
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
Fee sheets · Coming soon
Put 15821 and the rest of your codes on one sheet
Your codes at your locality, with payer contracts beside Medicare.
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