Billing code 74183: MRI abdomenMedicare rate & RVUs in Illinois
Reports an abdominal MRI that includes imaging before and after contrast, commonly used to characterize a lesion or evaluate abdominal organs.
Medicare pays $316.50–$347.63 for 74183 in the office in Illinois, from Rest Of Illinois to Suburban Chicago. 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 9 sections
What 74183 covers
This code describes an MRI examination of the abdomen with images acquired both before and after contrast administration. A radiologist interprets the images; the technical work uses the MRI scanner, staff, and related equipment. Common clinical questions include characterizing a liver lesion, evaluating a pancreatic or adrenal abnormality, and assessing other abdominal organ findings. The examination is performed in hospital imaging departments and freestanding diagnostic imaging centers.
Choose this code when the documented abdominal study includes both noncontrast and postcontrast imaging, rather than only one contrast approach. The order and report should support the abdominal anatomy examined, the use of contrast, and the diagnostic interpretation. CMS recognizes separate professional and technical components: modifier 26 identifies interpretation, modifier TC identifies the technical service, and billing without either modifier represents the global service. When multiple diagnostic imaging procedures are reported, the CMS multiple-procedure reduction applies to both components.
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 74183 pays more and less in Illinois
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
4 payment localities
$316.50 to $347.63
| Payment locality | Office | Facility |
|---|---|---|
| Chicago | $344.73 | Unavailable |
| East St. Louis | $320.72 | Unavailable |
| Rest Of Illinois | $316.50 | Unavailable |
| Suburban Chicago | $347.63 | Unavailable |
How the 74183 rate is calculated
Each of 74183’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 · 74183
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 2.15Practice expense 7.75Malpractice 0.16
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 74183
The CMS indicators that decide how 74183 is paid alongside other services.
CMS payment indicators · 74183
MRI abdomen
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 4 | Diagnostic imaging reduction applies to the technical component (and professional component) of additional services. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| 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 | 1 | Diagnostic test with separate professional (26) and technical (TC) components. |
What modifiers do to the payment
Modifier 26 · payment effect
With and without the modifier
74183 without 26 · national office
$336.01
MRI abdomen
74183-26 · Professional component
$101.54
Pays only the interpretation and report.
74183 compared with similar codes
Compare codes
74183 vs 74181 vs 74182 vs 74170: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 74181Abdominal MRI
- Use 74181 when the abdominal MRI is performed without contrast. 74183 requires both noncontrast and postcontrast imaging.
- 74182Abdominal MRI
- Use 74182 for an abdominal MRI with contrast only. Choose 74183 when the documented protocol includes imaging before and after contrast.
- 74170Ct abd wo cntrst flwd cntrst
- 74170 describes an abdominal CT without and with contrast. Use 74183 when the completed examination is MRI, not CT.
74183 billing questions
How does this differ from 74181 and 74182?
74183 represents an abdominal MRI with imaging both before and after contrast. Use 74181 for a study without contrast and 74182 for a study with contrast only.
Is the contrast reported as a separate MRI service?
No. The contrast phases are part of the MRI service represented by 74183; they do not make the examination two separate MRI studies.
When should modifier 26 or TC be used?
Use modifier 26 for the professional interpretation and modifier TC for the technical service. Without either modifier, the claim represents the global service.
Does the imaging multiple-procedure reduction affect this code?
Yes. CMS applies the diagnostic imaging multiple-procedure reduction to both the professional and technical components when the rule applies.
Can this code be used for an abdominal and pelvic MRI?
No. Code 74183 is for the abdomen. The reported anatomy and examination must support an abdominal MRI rather than an abdomen-and-pelvis study.
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
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