CPT code 93455: Coronary angiography, with bypass graft imaging2026 Medicare rate & RVUs in California
Reports coronary angiography with imaging of bypass grafts, typically during evaluation of coronary disease in a patient with prior bypass surgery.
Medicare pays $1,039.51–$1,322.27 for 93455 in the office in California, from Chico, CA to San Benito County, CA. 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.
Your location
On this page 9 sections
What 93455 covers
This service evaluates the native coronary arteries and surgically created bypass grafts using catheter-based contrast injections and imaging. It is commonly performed by a cardiologist in a cardiac catheterization laboratory when a patient with prior coronary artery bypass surgery needs diagnostic assessment of coronary blood flow or graft patency. Aortography may be included when performed as part of the graft assessment.
Report 93455 when the documented study includes coronary angiography and bypass graft angiography, without adding a left-heart catheterization service. The procedure report should identify the vessels and grafts studied, the imaging performed, and the interpreting physician’s findings. Medicare recognizes professional interpretation and technical services separately with modifiers 26 and TC; billing without either modifier represents the global service. The code has a 0-day global period, so same-day preoperative and postoperative care is included. For multiple procedures in one session, the highest-valued procedure is paid in full and others at 50%. Assistant-at-surgery payment requires documented medical necessity; 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.
Where 93455 pays more and less in California
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
29 payment localities
$1039.51 to $1322.27
29 of 29 payment localities
| Payment locality | Office | Facility |
|---|---|---|
| Bakersfield, CA | $1,042.49 | Unavailable |
| Chico, CA | $1,039.51 | Unavailable |
| El Centro, CA | $1,039.69 | Unavailable |
| Fresno, CA | $1,039.51 | Unavailable |
| Hanford, CA | $1,039.51 | Unavailable |
| Los Angeles, CA | $1,115.33 | Unavailable |
| Madera, CA | $1,039.51 | Unavailable |
| Marin County, CA | $1,292.24 | Unavailable |
| Merced, CA | $1,039.51 | Unavailable |
| Modesto, CA | $1,039.51 | Unavailable |
| Napa, CA | $1,217.57 | Unavailable |
| Oxnard, CA | $1,110.84 | Unavailable |
| Redding, CA | $1,039.51 | Unavailable |
| Rest of California | $1,039.51 | Unavailable |
| Riverside, CA | $1,051.12 | Unavailable |
| Sacramento, CA | $1,094.44 | Unavailable |
| Salinas, CA | $1,090.49 | Unavailable |
| San Benito County, CA | $1,322.27 | Unavailable |
| San Diego, CA | $1,119.06 | Unavailable |
| San Francisco, CA | $1,291.01 | Unavailable |
| San Luis Obispo, CA | $1,072.66 | Unavailable |
| Santa Clara County, CA | $1,317.26 | Unavailable |
| Santa Cruz, CA | $1,131.94 | Unavailable |
| Santa Maria, CA | $1,095.37 | Unavailable |
| Santa Rosa, CA | $1,143.51 | Unavailable |
| Stockton, CA | $1,039.51 | Unavailable |
| Vallejo, CA | $1,215.80 | Unavailable |
| Visalia, CA | $1,039.51 | Unavailable |
| Yuba City, CA | $1,039.51 | Unavailable |
How the 93455 rate is calculated
Each of 93455’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 · 93455
RVUs × geographic indexes × conversion factor
Work5.16
5.16 RVUs× 1.000 GPCI
Practice expense23.08
23.08 RVUs× 1.000 GPCI
Malpractice1.08
1.08 RVUs× 1.000 GPCI
Adjusted RVUs
29.3200
Conversion factor
$33.4009
Medicare rate
$979.31
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 93455
The CMS indicators that decide how 93455 is paid alongside other services.
CMS payment indicators · 93455
Coronary angiography, with bypass graft imaging
| 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) | 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
93455 without 26 · national office
$979.31
Coronary angiography, with bypass graft imaging
93455-26 · Professional component
$271.88
Pays only the interpretation and report.
93455 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 93454Coronary angiographyWithout graft or left-heart catheterization
- 93454 covers coronary angiography without bypass graft imaging. Choose 93455 when the documented study also images bypass grafts.
- 93457Cardiac catheterizationRight heart, coronaries, bypass grafts
- 93457 includes right-heart catheterization in addition to coronary and bypass graft angiography. 93455 does not include that right-heart study.
- 93459Cardiac catheterizationLeft heart with bypass grafts
- 93459 includes left-heart catheterization along with coronary and bypass graft angiography. Use 93455 when the documented service does not include left-heart catheterization.
93455 billing questions
When should 93455 be chosen over 93454?
Use 93455 when the diagnostic study includes bypass graft angiography along with coronary angiography. Use 93454 when coronary angiography is performed without graft imaging.
Does 93455 include left-heart catheterization?
No. If left-heart catheterization is also performed with coronary and bypass graft angiography, compare the documentation with 93459.
Can the professional and technical services be billed separately?
Yes. Modifier 26 identifies the professional interpretation, and modifier TC identifies the technical service. Without either modifier, the claim represents the global service.
How does Medicare handle multiple procedures in the same session?
The highest-valued procedure is paid in full, and other procedures subject to the multiple-procedure rule are paid at 50%.
What documentation supports reporting 93455?
The procedure report should show coronary imaging and bypass graft imaging, identify the vessels or grafts evaluated, and include the interpreting physician’s findings.
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
Put 93455 and the rest of your codes on one sheet
Your codes at your locality, with payer contracts beside Medicare.
Build my fee sheet