CPT 93452 Billing: Left Heart Catheterization

CPT 93452 covers a left heart catheterization with left ventriculography and no coronary angiography. It is a narrow code, and the most frequent error is reporting it alongside a coronary angiography code when a single combined code already describes that study.

What CPT 93452 covers

93452 is left heart catheterization including intraprocedural injection(s) for left ventriculography, imaging supervision and interpretation, when performed. It covers left-sided pressures and the ventriculogram.

What it does not include is coronary angiography. That is the distinction that drives its denial profile: if the coronaries were imaged in the same session, 93452 is the wrong code.

Picking the right code in the 93451 to 93461 family

This family is built so that you select the single code describing everything performed in the session. It is not a menu to assemble from parts. The combinations that matter:

93451: right heart catheterization alone.
93452: left heart catheterization with ventriculography, no coronary angiography.
93453: right and left heart catheterization, no coronary angiography.
93454: coronary angiography alone.
93455: coronary angiography with bypass graft angiography.
93456: coronary angiography with right heart catheterization.
93457: coronary angiography with bypass grafts and right heart catheterization.
93458: coronary angiography with left heart catheterization.
93459: coronary angiography with bypass grafts and left heart catheterization.
93460: coronary angiography with right and left heart catheterization.
93461: coronary angiography with bypass grafts and right and left heart catheterization.

If two codes in this family are on the same claim for the same session, one of them is almost always wrong. Find the single code that covers everything, then stop adding lines.

Reimbursement context

93452 splits into professional and technical components, and the setting decides which you may report. Payment follows the CMS Physician Fee Schedule and varies by locality. Pull the current allowable from the CMS Physician Fee Schedule Look-Up Tool rather than working from a national average.

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.

Common denials and the exact fix

CO-97: 93452 billed with 93454

A left heart catheterization performed with coronary angiography has its own single code.

Fix: report 93458 instead of the pair. This is the most common 93452 error by a wide margin.

Right heart catheterization billed alongside

93451 next to 93452 describes a combined right and left study.

Fix: report 93453 where no coronary angiography was performed, or 93460 where it was.

Bypass grafts imaged

93452 does not cover graft angiography.

Fix: report 93459 where coronary and graft angiography accompanied the left heart study.

CO-236: access, closure or guidance billed separately

All are inside the code through the same access in the same session.

Fix: remove those lines.

Modifier 26 / TC mismatch

A global code from a facility place of service denies.

Fix: align modifier, place of service and equipment ownership.

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.One add-on is separately reportable with 93452 when genuinely performed and documented: 93567 for supravalvular aortography. Pulmonary artery angiography, 93568, pairs only with codes that include a right heart catheterization, so it is not reported with 93452.

Modifier rules

26 / TC: split by setting, equipment ownership and place of service. A modifier that contradicts the place of service is the most common modifier denial in this family.
59 / XE / XP / XS / XU: only for a genuinely distinct service, meaning a separate session, site or encounter. Never a remedy for reporting two codes from this family together.
51: multiple procedures; usually payer-applied.
22: increased procedural services, rare, narrative required, manual review.
LC, LD, RC, RI, LM: vessel modifiers belong on intervention codes, not on diagnostic catheterization.

NCCI bundling edits

93452 with 93454: resolves to 93458.
93452 with 93451: resolves to 93453, or 93460 where coronary angiography was performed.
Access, closure, guidance and the ventriculography injections are included.
93567: separately reportable where genuinely performed. 93568: not reported with 93452, because it pairs only with codes that include right heart catheterization.

Frequently asked questions

What is the difference between CPT 93452 and 93458?

93452 is a left heart catheterization with ventriculography and no coronary angiography. 93458 is the same left heart study performed together with coronary angiography. If the coronaries were imaged in the session, 93458 is the correct single code and reporting 93452 with a separate angiography line will deny.

Can I bill 93452 and 93454 together?

No. That combination describes a left heart catheterization with coronary angiography, which is a single code: 93458. Billing the two separately produces a bundling denial and is the most common error on this code.

Is left ventriculography separately billable with 93452?

No. The intraprocedural injections for left ventriculography are included in 93452 when performed, along with the imaging supervision and interpretation. Billing a separate injection line produces an unbundling denial.

Sources

American Medical Association, CPT 2026 Professional Edition.
Centers for Medicare & Medicaid Services, National Correct Coding Initiative Policy Manual and quarterly edit tables, cms.gov.
Centers for Medicare & Medicaid Services, Physician Fee Schedule Look-Up Tool, cms.gov.
American College of Cardiology, acc.org. AAPC coding resources, aapc.com.

CPT® is a registered trademark of the American Medical Association. Code descriptors are summarised here for billing guidance and are not a substitute for the current CPT codebook. Payer rules and NCCI edits change quarterly; verify against your own payer policy before submission.

Related codes

CPT 93458. Left heart cath with coronary angiography.
CPT 93451. Right heart catheterization.
CPT 93460. Right and left heart cath with coronary angiography.

CPT 93452: Left Heart Catheterization With Ventriculography