CPT code 64421: Intercostal nerve block, each additional nerve2026 Medicare rate & RVUs in Barrington, Illinois
CPT 64421: $36.93–$37.43 office ($23.21–$24.01 facility) across 2 localities in Barrington, IL in 2026 Medicare. Compare each area.
Medicare pays $36.93–$37.43 for 64421 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 64421 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 | $37.43 | $24.01 |
| Suburban Chicago, IL | $36.93 | $23.21 |
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 64421 rate is calculated
Each of 64421’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 · 64421
RVUs × geographic indexes × conversion factor
Work0.49
0.49 RVUs× 1.000 GPCI
Practice expense0.51
0.51 RVUs× 1.000 GPCI
Malpractice0.05
0.05 RVUs× 1.000 GPCI
Adjusted RVUs
1.0500
Conversion factor
$33.4009
Medicare rate
$35.07
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 64421
The CMS indicators that decide how 64421 is paid alongside other services.
CMS payment indicators · 64421
Intercostal nerve block, each additional nerve
| Rule | CMS value | What it means |
|---|---|---|
| Global period | ZZZ | Add-on code: falls within the primary procedure’s global period. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| Assistant at surgery (80/81/82/AS) | 1 | Not paid (statutory restriction). |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
What modifiers do to the payment
Modifier 50 · payment effect
With and without the modifier
64421 without 50 · national office
$35.07
Intercostal nerve block, each additional nerve
64421-50 · Bilateral: 150%
$52.61
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 64421 and the rest of your codes on one sheet
Your codes at your locality, with payer contracts beside Medicare.
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