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CPT code 93655: Catheter ablation, separate arrhythmia mechanism2026 Medicare rate & RVUs

Reports catheter ablation of an additional, distinct arrhythmia mechanism during a primary ablation procedure, such as atrial flutter treated during an atrial fibrillation ablation.

CMS RVU26DEffective Oct 1, 2026109 payment localities60.2K Medicare services in 2024

Medicare pays $260.86 for 93655 nationally in a facility.

Medicare rate · 93655

Catheter ablation, separate arrhythmia mechanism

Office or facility?

Work RVUs
5.36
Total RVUs
7.81
Global days
ZZZ

National rate · 2026

$260.86

Facility setting, before claim adjustments.

See every locality for 93655 →Billed by an NP, PA or therapist? →

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

Medicare pays by the payment locality where the service is performed.

On this page 10 sections
  1. Medicare rate
  2. What 93655 covers
  3. By payment locality
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Similar codes
  8. Related codes
  9. Billing questions
  10. Sources

What 93655 covers

An electrophysiologist reports this code when a catheter ablation session treats an arrhythmia mechanism distinct from the session’s primary ablation target. For example, an atrial flutter circuit may be treated during a procedure whose primary target is atrial fibrillation. The separate target must represent another mechanism, not simply additional lesions directed at the primary arrhythmia. These procedures are typically performed in a cardiac electrophysiology lab using intracardiac catheters and electrophysiologic mapping.

Report 93655 only with a qualifying primary ablation code: 93653, 93654, or 93656. The record should identify the separate arrhythmia mechanism and document its evaluation and ablation. This is an add-on service, not a stand-alone claim line; CMS pays it within the primary procedure’s global-period framework. Report the additional mechanism treated, rather than counting individual lesions as separate units.

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 93655 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

93655 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$237.52
AlaskaUnavailable$333.89
ArizonaUnavailable$253.53
ArkansasUnavailable$234.73
Atlanta, GAUnavailable$270.55
Austin, TXUnavailable$258.67
Bakersfield, CAUnavailable$251.46
Baltimore area, MDUnavailable$276.66
Beaumont, TXUnavailable$254.30
Brazoria, TXUnavailable$252.61

93655 rates by state

Office rate range in each state. Select a state to see its payment localities.

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Explore a state

Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

View every state and territory as a table
93655 office rate range by state
State / territoryOffice rate rangeLocalities
AKNo published base rate1
ALNo published base rate1
ARNo published base rate1
AZNo published base rate1
CANo published base rate29
CONo published base rate1
CTNo published base rate1
DCNo published base rate1
DENo published base rate1
FLNo published base rate3
GANo published base rate2
GUNo published base rate1
HINo published base rate1
IANo published base rate1
IDNo published base rate1
ILNo published base rate4
INNo published base rate1
KSNo published base rate1
KYNo published base rate1
LANo published base rate2
MANo published base rate2
MDNo published base rate3
MENo published base rate2
MINo published base rate2
MNNo published base rate1
MONo published base rate3
MSNo published base rate1
MTNo published base rate1
NCNo published base rate1
NDNo published base rate1
NENo published base rate1
NHNo published base rate1
NJNo published base rate2
NMNo published base rate1
NVNo published base rate1
NYNo published base rate5
OHNo published base rate1
OKNo published base rate1
ORNo published base rate2
PANo published base rate2
PRNo published base rate1
RINo published base rate1
SCNo published base rate1
SDNo published base rate1
TNNo published base rate1
TXNo published base rate8
UTNo published base rate1
VANo published base rate2
VINo published base rate1
VTNo published base rate1
WANo published base rate2
WINo published base rate1
WVNo published base rate1
WYNo published base rate1

How the 93655 rate is calculated

Each of 93655’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 · 93655

RVUs × geographic indexes × conversion factor

Office or facility?

Work5.36

5.36 RVUs× 1.000 GPCI

Practice expense1.18

1.18 RVUs× 1.000 GPCI

Malpractice1.27

1.27 RVUs× 1.000 GPCI

Adjusted RVUs

7.8100

Conversion factor

$33.4009

Medicare rate

$260.86

Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.

Payment rules and modifiers for 93655

The CMS indicators that decide how 93655 is paid alongside other services.

CMS payment indicators · 93655

Catheter ablation, separate arrhythmia mechanism

RuleCMS valueWhat it means
Global periodZZZAdd-on code: falls within the primary procedure’s global period.
Multiple procedures0No multiple-procedure reduction.
Bilateral (modifier 50)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)0Not paid without supporting documentation.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.

93655 compared with similar codes

Compare codes · National

5 codes, side by side

Office or facility?

  • 93655

    Catheter ablation, separate arrhythmia mechanism5.36 wRVU

    Not priced

  • 93653

    SVT ablation, comprehensive EP evaluation14.63 wRVU

    Not priced

  • 93654

    VT ablation, comprehensive EP evaluation17.65 wRVU

    Not priced

  • 93656

    AF ablation, pulmonary vein isolation16.58 wRVU

    Not priced

  • 93657

    AF ablation, additional atrial lesions5.36 wRVU

    Not priced

How to choose

93653SVT ablationComprehensive EP evaluation
93653 describes the primary ablation for supraventricular tachycardia. Use 93655 only for an additional, distinct mechanism treated in the same session.
93654VT ablationComprehensive EP evaluation
93654 describes the primary ventricular tachycardia ablation. 93655 represents treatment of a separate arrhythmia mechanism in addition to that primary target.
93656AF ablationPulmonary vein isolation
93656 describes the primary atrial fibrillation ablation. Add 93655 when a distinct mechanism, such as a separate flutter circuit, is also ablated.
93657AF ablationAdditional atrial lesions
93657 is for additional atrial ablation directed at atrial fibrillation after the primary AF ablation; 93655 is for a distinct arrhythmia mechanism.

Codes related to 93655

Related codes aren’t interchangeable: bill the code that matches the service performed.

Codes related to 93655
CodeHow it relatesNational office range
Add-on codes
93653SVT ablation, comprehensive EP evaluationQualifying primary ablation for supraventricular tachycardia.No office rate
93654VT ablation, comprehensive EP evaluationQualifying primary ablation for ventricular tachycardia.No office rate
93656AF ablation, pulmonary vein isolationQualifying primary ablation for atrial fibrillation.No office rate
Often billed with
936133D mapping, intracardiac electrophysiologyThree-dimensional intracardiac mapping may be performed during the ablation session.No office rate
93662Intracardiac ultrasound, EP procedure imagingIntracardiac echocardiography may be used during the ablation session.No office rate

93655 billing questions

Which primary codes can accompany 93655?

Report it with 93653, 93654, or 93656. It is an add-on code and cannot stand alone.

Can 93655 be used for atrial flutter treated during an atrial fibrillation ablation?

Yes, when the flutter is a separately identified arrhythmia mechanism treated during the session, in addition to the primary atrial fibrillation target.

How is 93655 different from 93657?

93655 addresses ablation of a distinct arrhythmia mechanism. 93657 addresses additional atrial ablation for atrial fibrillation after the primary AF ablation.

Is 93655 reported for each lesion?

No. The code represents treatment of an additional discrete mechanism, not the number of lesions delivered.

What documentation supports 93655?

Document the separate arrhythmia mechanism, the findings that identify it, and the ablation performed for that target, alongside the primary ablation.

How does CMS handle payment for this add-on?

CMS pays 93655 within the primary procedure’s global-period framework. The code must be reported with a qualifying primary ablation.

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
RVUs for 93655PPRRVU2026_Oct_nonQPP.csv, line 12,243 (RVU26D)

Open CMS sourceHow we calculate rates

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