Billing code 93585: Congenital venographyMedicare rate & RVUs in Washington
Reports targeted venous imaging of the azygos or hemiazygos system during congenital cardiac catheterization when its course or connections need evaluation.
CMS doesn’t publish an office rate for 93585 in Washington.
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 93585 covers
This add-on service captures catheter-based contrast imaging of the azygos or hemiazygos venous system in a patient with congenital heart disease. A congenital cardiac catheterization team may use it to define an unusual venous route or connection, such as an azygos pathway in a patient with interrupted inferior vena cava. The imaging can help explain catheter course and venous return or guide procedural planning.
Report 93585 only with an eligible primary congenital heart catheterization, such as codes 93593–93597; it is not a stand-alone service. The record should support why this specific venous territory was imaged and document the catheter injection and resulting images or interpretation. CMS classifies the code as an add-on and pays it within the primary procedure’s global period.
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 93585 pays more and less in Washington
| Payment locality | Office | Facility |
|---|---|---|
| Rest Of Washington | Unavailable | $46.38 |
| Seattle (King Cnty) | Unavailable | $49.09 |
How the 93585 rate is calculated
Each of 93585’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 · 93585
RVUs × geographic indexes × conversion factor
Work1.10
1.10 RVUs× 1.000 GPCI
Practice expense0.21
0.21 RVUs× 1.000 GPCI
Malpractice0.07
0.07 RVUs× 1.000 GPCI
Adjusted RVUs
1.3800
Conversion factor
$33.4009
Medicare rate
$46.09
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 93585
The CMS indicators that decide how 93585 is paid alongside other services.
CMS payment indicators · 93585
Congenital venography
| 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) | 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 | 0 | Physician service: no professional/technical split. |
93585 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 93584Venography
- Use 93585 for azygos or hemiazygos imaging; 93584 identifies venography directed at an anomalous or persistent superior vena cava.
- 93586Coronary sinus venography
- Use 93586 when the coronary sinus is the target. 93585 is specific to the azygos or hemiazygos venous system.
- 93587Venography
- 93587 addresses venovenous collateral vessels at or above the heart; 93585 describes imaging of the azygos or hemiazygos system.
- 93588Congenital venography
- 93588 addresses venovenous collateral vessels below the heart. Use 93585 when the imaged target is the azygos or hemiazygos system.
93585 billing questions
Can 93585 be submitted by itself?
No. It is an add-on for azygos or hemiazygos venography and must be reported with an eligible primary congenital heart catheterization, such as 93593–93597.
How is 93585 different from 93584?
93585 is for imaging the azygos or hemiazygos system. 93584 concerns venography of an anomalous or persistent superior vena cava.
When would 93585 be more appropriate than 93586?
Choose based on the vessel imaged: 93585 addresses the azygos or hemiazygos system, while 93586 addresses the coronary sinus.
What documentation supports reporting 93585?
Document the clinical reason for imaging this venous pathway, the catheter-based contrast study, and the resulting images or interpretation.
How does the add-on payment rule affect billing?
CMS requires 93585 to accompany a primary procedure and places payment within that procedure’s global period.
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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