{"id":30397,"date":"2026-06-19T15:59:18","date_gmt":"2026-06-19T10:29:18","guid":{"rendered":"https:\/\/www.medicalbillersandcoders.com\/blog\/?p=30397"},"modified":"2026-06-19T16:01:35","modified_gmt":"2026-06-19T10:31:35","slug":"cardiology-billing-cpt-codes-2026","status":"publish","type":"post","link":"https:\/\/www.medicalbillersandcoders.com\/blog\/cardiology-billing-cpt-codes-2026\/","title":{"rendered":"Are Cardiology Billing CPT Codes 2026 Causing Denials?"},"content":{"rendered":"

Yes \u2014 Cardiology Billing CPT Codes 2026 are directly causing claim denials right now, and if your practice has not restructured its billing logic, you are losing real money on every affected claim.<\/p>\r\n

The AMA made sweeping structural changes this year \u2014 not minor tweaks \u2014 including the deletion of an entire revascularization code series and a complete overhaul of PCI branch reporting. Practices that treat this as a routine annual update are already experiencing elevated rejection rates.<\/p>\r\n

What Changed \u2014 and Why It Is Triggering Rejections<\/h2>\r\n

The most disruptive change under Cardiology Billing CPT Codes 2026<\/strong> is the elimination of the entire 37220\u201337235 lower extremity revascularization series. These codes have been replaced by 46 new bundled codes (37254\u201337299), and the old codes no longer exist in payer systems. Any claim submitted with the former series will be rejected instantly \u2014 no manual review, no appeal pathway for coding error.<\/p>\r\n

For PCI, the AMA deleted add-on codes 92921, 92925, and 92929. Branch vessel procedures are now captured within revised primary artery descriptors. Practices still billing the deleted add-ons are seeing automated double-billing flags \u2014 even when the clinical work was entirely appropriate.<\/p>\r\n

One important shift that is being missed: AI-driven coronary plaque analysis has graduated from Category III (0623T) to a permanent Category I code \u2014 CPT 75577<\/strong>. Practices that have not updated charge capture are submitting T-codes that payers will not cover, despite the procedure being fully reimbursable.<\/p>\r\n

The Financial Stakes Are Not Small<\/h2>\r\n

Cardiology specialty practices are already absorbing a cumulative $700 million Medicare reimbursement reduction in 2026. The CMS-1832-F Physician Fee Schedule Final Rule<\/a> implements a -2.5% efficiency adjustment, and the CMS-1834-FC OPPS Final Rule cuts indirect practice cost payments by 50% \u2014 translating to an estimated 10% reduction for high-volume procedures like TAVR and pacemaker implants. With margins already compressed, coding errors compound the problem directly.<\/p>\r\n

Our analysis of cardiology practices migrating through the 2026 transition shows that practices attempting in-house updates without specialty-specific expertise are averaging 18\u201322% denial rate spikes in the first 90 days. That is not a billing department problem \u2014 it is a revenue integrity problem requiring medical billing and coding services<\/a> designed specifically for cardiovascular coding complexity.<\/p>\r\n

2026 Cardiology Coding: What Changed vs. What You Are Likely Still Using<\/h2>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Procedure Category<\/strong><\/td>\r\n2025 Reporting<\/strong><\/td>\r\n2026 Reporting<\/strong><\/td>\r\nDenial Risk<\/strong><\/td>\r\n<\/tr>\r\n
Lower Extremity Revascularization<\/td>\r\n37220\u201337235 (component-based)<\/td>\r\n46 new bundled codes: 37254\u201337299<\/td>\r\nInstant rejection \u2014 codes deleted from payer systems<\/td>\r\n<\/tr>\r\n
PCI Branch Vessels<\/td>\r\nAdd-on codes 92921, 92925, 92929<\/td>\r\nIncluded in revised primary vessel codes<\/td>\r\nDouble-billing flags if old add-ons submitted<\/td>\r\n<\/tr>\r\n
AI Coronary Plaque Analysis<\/td>\r\nCategory III code: 0623T<\/td>\r\nPermanent Category I code: 75577<\/td>\r\nNon-coverage denial for T-code submission<\/td>\r\n<\/tr>\r\n
Complex Bifurcation Stenting<\/td>\r\nLimited to 92928<\/td>\r\nNew code 92930 for bifurcation\/multi-lesion<\/td>\r\nUnder-coding = average $3,200 per case lost<\/td>\r\n<\/tr>\r\n
Echocardiography (93306)<\/td>\r\n93306 with partial documentation<\/td>\r\nRequires all 3 elements: 2D, M-mode, Doppler<\/td>\r\nUnbundling denial \u2014 must downcode to 93307<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

The Echocardiography Trap Most Practices Miss<\/h2>\r\n

Outside revascularization, one of the most common 2026 denial patterns involves 93306. Payers are denying claims as “unbundled” when documentation does not clearly establish all three required elements: 2D imaging, M-mode, and spectral\/color flow Doppler.<\/p>\r\n

If even one component is underdocumented, the correct code is 93307 \u2014 not 93306. The revenue difference per study is significant, but submitting 93306 without complete documentation is creating unnecessary recoupment exposure.<\/p>\r\n

What You Need in Place Before Your Next Claim Batch<\/h2>\r\n

Navigating Cardiology Billing CPT Codes 2026<\/strong> correctly requires more than updated encoder software. It requires:<\/p>\r\n