CPT code 77013: CT guidance, parenchymal tissue ablation2026 Medicare rate & RVUs in Missouri
Reports CT imaging used to guide and monitor percutaneous ablation of parenchymal tissue, rather than CT guidance for needle placement or localization.
CMS doesn’t publish an office rate for 77013 in Missouri.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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What 77013 covers
77013 reports CT imaging used to guide and monitor percutaneous ablation of parenchymal tissue. During treatment, the physician uses CT images to direct the ablation instrument toward the target and monitor its position as the procedure proceeds. Interventional radiologists commonly provide or interpret this imaging in an interventional radiology or other procedural setting. The code describes imaging guidance, not the therapeutic ablation itself. It differs from CT guidance for needle placement, such as for biopsy, and from CT localization for other purposes.
Medicare assigns this code physician fee schedule status C, or carrier priced. CMS publishes no national payment, and the Medicare Administrative Contractor sets payment for each claim. The service has professional and technical components: modifier 26 identifies the professional interpretation, and modifier TC identifies the technical work, equipment, and staff. Reporting without a component modifier represents the global service.
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 77013 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | Unavailable | Unavailable |
| Metropolitan St. Louis, MO | Unavailable | Unavailable |
| Rest of Missouri | Unavailable | Unavailable |
How the 77013 rate is calculated
Each of 77013’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 · 77013
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense0.00
0.00 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
0.0000
Conversion factor
$33.4009
Medicare rate
$0.00
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 77013
The CMS indicators that decide how 77013 is paid alongside other services.
CMS payment indicators · 77013
CT guidance, parenchymal tissue ablation
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| 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
77013 without 26 · national facility
$0.00
CT guidance, parenchymal tissue ablation
77013-26 · Professional component
$177.02
Pays only the interpretation and report.
77013 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 77022MRI ablation guidanceGuidance and monitoring
- Both cover imaging guidance and monitoring for tissue ablation. Choose 77013 for CT and 77022 for MRI.
- 77012CT guidanceNeedle placement
- 77012 is CT guidance for needle placement, such as biopsy; 77013 is CT guidance and monitoring during parenchymal tissue ablation.
- 77011CT localizationStereotactic guidance
- 77011 describes CT localization for another purpose. 77013 is specific to guidance and monitoring during tissue ablation.
77013 billing questions
When should I use 77013 instead of 77012?
Use 77013 for CT guidance and monitoring during parenchymal tissue ablation. Code 77012 describes CT guidance for needle placement, such as for a biopsy.
How does 77013 differ from 77022?
Both describe imaging guidance and monitoring for tissue ablation, but 77013 uses CT and 77022 uses MRI.
Which modifier identifies the physician's work?
Modifier 26 identifies the professional component, including interpretation. Modifier TC identifies the technical component; reporting without a component modifier represents the global service.
Does Medicare publish a national payment for 77013?
No. Its physician fee schedule status is C, or carrier priced, so the Medicare Administrative Contractor sets payment for each claim.
Does 77013 describe the ablation treatment itself?
No. It describes CT guidance and monitoring during tissue ablation, not the therapeutic procedure.
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
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