CPT code 27310: Knee arthrotomy, exploration, drainage, or foreign body2026 Medicare rate & RVUs in Bartlett, Illinois
CPT 27310: $752.16–$781.49 facility across 2 localities in Bartlett, IL in 2026 Medicare. Compare each area.
CMS doesn’t publish an office rate for 27310 in Bartlett, Illinois.
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 27310 pays more and less in Bartlett, Illinois
Bartlett, 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 | Unavailable | $781.49 |
| Suburban Chicago, IL | Unavailable | $752.16 |
How payment areas work in Bartlett
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 · DuPage County, Kane County
City boundaries: 2026 Census geography · Census source · CMS county-to-locality definitions
How the 27310 rate is calculated
Each of 27310’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 · 27310
RVUs × geographic indexes × conversion factor
Work9.75
9.75 RVUs× 1.000 GPCI
Practice expense8.83
8.83 RVUs× 1.000 GPCI
Malpractice2.05
2.05 RVUs× 1.000 GPCI
Adjusted RVUs
20.6300
Conversion factor
$33.4009
Medicare rate
$689.06
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 27310
27310 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 27310
Knee arthrotomy, exploration, drainage, or foreign body
| 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) | 2 | Paid. |
| Co-surgeons (62) | 1 | Permitted with supporting documentation. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
| Split (54/55/56) | 0.10/0.69/0.21 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 27310
Knee arthrotomy, exploration, drainage, or foreign body
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
27310 without 50 · national facility
$689.06
Knee arthrotomy, exploration, drainage, or foreign body
27310-50 · Bilateral: 150%
$1,033.59
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 27310 and the rest of your codes on one sheet
Your codes at your locality, with payer contracts beside Medicare.
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