CPT code 37213: Thrombolytic infusion2026 Medicare rate & RVUs in Alaska
Reports the second treatment day of catheter-directed thrombolysis when an arterial or venous infusion continues under interventional management.
CMS doesn’t publish an office rate for 37213 in Alaska.
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 37213 covers
This code describes continued catheter-directed thrombolytic treatment on the second day, after an initial treatment day. The interventional radiologist, vascular surgeon, or another qualified physician manages the ongoing infusion and may exchange the treatment catheter. The service includes the associated fluoroscopic guidance and imaging supervision and interpretation. It is typically performed in a hospital setting for an occluded artery or vein being treated with infused thrombolytic medication.
Report 37213 for the second treatment day, regardless of whether the treated vessel is arterial or venous; the initial-day code distinguishes those vessel types. Documentation should establish the treatment sequence and date, the continuing infusion, and catheter and imaging management. The CMS global period is 0 days, so same-day preoperative and postoperative care is included. When multiple procedures occur in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% reduction. Modifier 50 is inappropriate; assistant-at-surgery payment is restricted, and co-surgeons and team surgery are not permitted.
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.
37213 in Alaska*
| Payment locality | Office | Facility |
|---|---|---|
| Alaska* | Unavailable | $268.24 |
How the 37213 rate is calculated
Each of 37213’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 · 37213
RVUs × geographic indexes × conversion factor
Work4.63
4.63 RVUs× 1.000 GPCI
Practice expense0.58
0.58 RVUs× 1.000 GPCI
Malpractice0.85
0.85 RVUs× 1.000 GPCI
Adjusted RVUs
6.0600
Conversion factor
$33.4009
Medicare rate
$202.41
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 37213
The CMS indicators that decide how 37213 is paid alongside other services.
CMS payment indicators · 37213
Thrombolytic infusion
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 000 | Same-day global: pre- and post-op care on the day of the procedure is included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| 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 51 · payment effect
With and without the modifier
37213 without 51 · national facility
$202.41
Thrombolytic infusion
37213-51 · Second procedure: 50%
$101.21
When this isn’t the highest-valued procedure in the session, Medicare pays 50% of its fee schedule amount (the highest is paid at 100%).
37213 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 37211Arterial thrombolysis
- Use 37211 for the initial treatment day when the infusion treats an artery. Use 37213 for continued treatment on the second day.
- 37212Venous thrombolysis
- Use 37212 for the initial treatment day when the infusion treats a vein. Use 37213 for continued treatment on the second day.
- 37214Thrombolysis
- Use 37214 for the day thrombolytic infusion is stopped and the catheter is removed; 37213 represents continued treatment on the second day.
37213 billing questions
How does 37213 differ from 37211 and 37212?
37213 is for the second treatment day, while 37211 and 37212 describe initial-day treatment. The initial-day code distinguishes arterial from venous infusion; 37213 covers continued treatment for either.
Is catheter exchange separately reported with 37213?
Catheter exchange is included in the continued-treatment service. Fluoroscopic guidance and the related imaging supervision and interpretation are also included.
Can 37213 be reported for each catheter or treated vessel?
The code represents the second treatment day, not a separate charge for each catheter or vessel. Documentation should support that thrombolytic infusion continued on that day.
Should modifier 50 be used for bilateral treatment?
No. CMS identifies bilateral adjustment as inappropriate for this code; modifier 50 should not be used.
Can an assistant or co-surgeon be paid for this service?
CMS restricts assistant-at-surgery payment for 37213. Co-surgeons and team surgery are not permitted.
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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