CPT 93461 Billing: R/L Cath With Grafts

Mukesh MakwanaFounder & CEO · Hands-on medical billing & RCM across 11 specialties · Reviewed September 28, 2026

CPT 93461 is the most complete code in the diagnostic catheterization family, covering a combined right and left heart study with both coronary and bypass graft angiography. Because it sits at the top of the family, its errors are almost entirely errors of under-reporting.

What CPT 93461 covers

93461 is catheter placement for coronary angiography, including intraprocedural injections, imaging supervision and interpretation, with right and left heart catheterization including injection(s) for left ventriculography when performed, and bypass graft angiography.

Nothing else in the family covers more. If every one of those elements was performed and documented, 93461 is the single correct code and no component of it is separately reportable.

Where 93461 sits in the cath family

93461 is the top of the family: coronary and bypass graft angiography with right and left heart catheterization. Every other code from 93451 to 93460 describes a subset of it, so none of them is added alongside 93461 for the same session. If the grafts were not imaged, the session is 93460. See the complete 93451 to 93461 code map on the CPT 93458 guide.

Reimbursement context

93461 splits into professional and technical components, and the setting decides which you may report.

2026 Medicare RVUs for CPT 93461

CPT 93461: 2026 Medicare RVUs (national, before GPCI)
Line	Work	PE, non-facility	PE, facility	Malpractice	Total, non-facility	Total, facility
Global (no modifier)	7.65	30.58	NA	1.56	39.79	NA
Professional (modifier 26)	7.65	2.89	2.89	1.49	12.03	12.03
Technical (modifier TC)	0.00	27.69	NA	0.07	27.76	NA

Source: CMS CY 2026 PFS Relative Value File, RVU26D (October release, published 08/26/2026). RVUs are national and unadjusted; commercial payers set their own rates.

In the 2026 CMS relative value file, CPT 93461 carries 7.65 work RVUs and 39.79 total RVUs when billed globally in a non-facility setting. The global line is NA in a facility, because there the physician bills the professional component only and the facility bills the technical side. Its PC/TC indicator is 1: the code splits into a professional component (modifier 26, 12.03 total RVUs) and a technical component (modifier TC, 27.76 total RVUs), and the global line is billed only when one entity does both. Its global period is 000: related work on the day of the procedure is included, with no postoperative days. Across the diagnostic catheterization family, work RVUs run from 2.41 (93451) to 7.65 (93461), so 93461 carries the highest physician work in its group.

To turn RVUs into payment, each component is multiplied by your locality's geographic practice cost index, the three are added, and the sum is multiplied by the 2026 conversion factor: $33.4009, or $33.5675 for qualifying APM participants (CMS-1832-F; CMS fact sheet). The CMS Physician Fee Schedule Look-Up Tool runs that calculation for your locality.

Documentation requirements

The cardiac indication that justified the study, coded specifically.
Access site, sheath and each catheter used.
Every vessel or chamber selectively engaged, with findings.
Hemodynamic measurements obtained, including pressures, gradients and saturations where applicable.
Contrast volume and fluoroscopy time.
A signed interpretation naming the study actually performed.
Where an intervention followed in the same session, why the diagnostic study was necessary and not already available.

Medicare contractor billing articles. Each Medicare Administrative Contractor publishes its own billing and coding articles for this service, and the covered diagnoses differ by jurisdiction. Active examples in the CMS Medicare Coverage Database, checked September 28, 2026: A52850 (Cardiac Catheterization and Coronary Angiography, Wellpoint Federal) and A56500 (Cardiac Catheterization and Coronary Angiography, CGS). Use the article from the contractor that processes your claims.

Common denials and the exact fix

Under-reported as 93459 or 93460

The dominant 93461 problem. A post-CABG patient who had a right heart study, a left heart study, coronary angiography and graft imaging is frequently billed at a lower level, and the claim pays, so nobody notices.

Fix: audit post-CABG combined studies against what the procedure note documents. This is one of the few places in cardiology where a coding audit reliably finds money owed rather than money at risk.

CO-97: components billed alongside 93461

93451 and 93454 are both inside the code.

Fix: remove those lines and report 93461 alone.

Graft or right heart work not documented

Billing the top of the family requires the record to show each element: right-sided pressures and saturations, the left heart study, coronary findings per vessel and graft findings per graft.

Fix: build the procedure note template around those four blocks so the documentation matches the code.

CO-236: access, closure and guidance billed separately

Included through the same access in the same session.

Fix: remove those lines.

What is already inside these codes

Vascular access and sheath placement through the same access.
Fluoroscopic guidance and roadmapping.
Closure devices.
The intraprocedural injections for the angiography described by the code.
Imaging supervision and interpretation.

Billing any of these separately on the professional claim produces a CO-236 unbundling denial. Hospitals may still report closure device placement with HCPCS G0269, but it is packaged into the procedure rather than paid separately.Two add-ons are separately reportable with 93461 when genuinely performed and documented: 93567 for supravalvular aortography and 93568 for pulmonary artery angiography.

Modifier rules

26 / TC: 93461 splits by setting. In a hospital the physician bills modifier 26 and the facility reports the technical side; the global line is only for one entity furnishing both. A modifier that contradicts the place of service is the most common modifier denial on 93461.
59 / XE / XP / XS / XU: only for a genuinely distinct service in a separate session, site or encounter. 93461 already contains every other code in the family, so none of them is added with a modifier.
51: multiple procedures; most payers apply it automatically.
22: increased procedural services on 93461 is rare, needs a narrative and goes to manual review.
LC, LD, RC, RI, LM: vessel modifiers belong on intervention codes, not on 93461.

NCCI bundling edits

93451 and 93454 are components of 93461 and are never separately reportable alongside it.
93458, 93459 and 93460 all describe work contained within 93461 for the same session.
Access, closure, guidance and angiographic injections are included.
93567 and 93568: both separately reportable with 93461 where genuinely performed and documented.

Frequently asked questions

When is CPT 93461 the correct code?

When a right heart catheterization, a left heart catheterization, coronary angiography and bypass graft angiography were all performed in the same session. It is the most complete code in the diagnostic catheterization family and no component of it is separately reportable.

What is the difference between 93460 and 93461?

Bypass graft angiography. 93460 is the combined right and left heart catheterization with coronary angiography; 93461 is the same study with graft imaging added. In a post-CABG patient whose grafts were selectively engaged and imaged, 93461 is the correct code.

Why is 93461 often under-reported?

Because a lower-level code such as 93459 or 93460 still pays, so the error never surfaces as a denial. Post-CABG combined studies are the cases worth auditing, since the documentation frequently supports a higher code than the one billed.

Sources

American Medical Association, CPT 2026 Professional Edition.
Centers for Medicare & Medicaid Services, CY 2026 PFS Relative Value File RVU26D (October release): RVUs, PC/TC indicator and global period for CPT 93461.
Centers for Medicare & Medicaid Services, CY 2026 Physician Fee Schedule final rule, CMS-1832-F: conversion factors.
Centers for Medicare & Medicaid Services, National Correct Coding Initiative Policy Manual for Medicare Services and quarterly procedure-to-procedure edit tables.
Medicare Coverage Database billing and coding articles A52850, A56500.

CPT® is a registered trademark of the American Medical Association. Payer policy and NCCI edits change quarterly, so check your own contractor before submission. How we verify this guidance.

Related codes

CPT 93460. Right and left heart cath with coronary angiography.
CPT 93459. Left heart cath with coronary and bypass graft angiography.
CPT 93451. Right heart catheterization.

CPT 93461: Right and Left Heart Catheterization With Bypass Graft Angiography