Bundle of his recording
CPT 93600 covers the recording of electrical activity from the Bundle of His, a specialized group of heart muscle fibers that coordinate heartbeats. This diagnostic test helps identify the exact location and type of heart rhythm problems.
This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
NCCI bundling edits
Loading bundling edits…
Billing tips
Always bill 93600 as part of comprehensive EP study codes (93619-93622) when performed together, as standalone Bundle of His recording is rarely appropriate
Impact: Prevents $109.33 underpayment when comprehensive codes averaging $800-2000+ should be billed instead
Document specific His bundle deflection measurements (AH interval, HV interval) and their clinical significance in the procedure report
Impact: Reduces audit risk and denial rate by 40-60% when specific conduction intervals are documented
Verify that 93600 is not already included in the comprehensive EP study code being billed; CMS bundles this into 93619-93622
Impact: Prevents 100% denial for duplicate billing and potential fraud investigation
When billing standalone 93600, ensure documentation supports why comprehensive EP study was not performed and medical necessity for isolated His recording
Impact: Reduces medical necessity denials by approximately 35%; isolated His recording is uncommon
Confirm catheter placement verification with fluoroscopy is documented separately if billing imaging codes; do not assume bundled
Impact: May capture additional $50-150 in imaging reimbursement when properly documented and coded
Check payer-specific policies as some commercial insurers have different bundling rules than Medicare for EP procedures
Impact: Can affect 15-25% of reimbursement depending on payer mix and local coverage determinations
Common denials
Real billers contribute denial patterns and appeal strategies for this code. Once 5+ reports come in, you’ll see live aggregated data here — the only place this exists, free.
Get the free Revenue Protection Toolkit — the denial triggers, modifier pitfalls, and bundling conflicts that quietly cost you reimbursement. Instant download.
Help build the field knowledge
MedPayIQ gets smarter as billers contribute. If you've had this code denied, share what happened so others learn from it. Anonymous, no patient info.