CPT code 93623: Drug-provoked stimulation, after IV infusion2026 Medicare rate & RVUs in California

CMS doesn’t publish an office rate for 93623 in California.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 93623 covers

This add-on service covers programmed electrical stimulation and pacing performed after an intravenous drug infusion during invasive cardiac electrophysiology testing. An electrophysiologist may use the drug challenge, commonly with isoproterenol, to assess arrhythmia inducibility or provoke an arrhythmia that was not evident during baseline testing. The service is reported in an electrophysiology laboratory with a qualifying primary procedure, such as a comprehensive EP study or an ablation procedure that includes EP evaluation.

Medicare assigns status C: the Medicare Administrative Contractor determines payment for each claim rather than CMS publishing a national amount. The code is an add-on and must be reported with a primary procedure; CMS places its payment within that procedure’s global period. The diagnostic service has professional and technical components: modifier 26 identifies interpretation, modifier TC identifies equipment and staff, and no modifier represents the global service. This code reports the stimulation and pacing service, not a drug dose.

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 93623 pays more and less in California

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

29 of 29 payment localities

How the 93623 rate is calculated

Each of 93623’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.

Payment rules and modifiers for 93623

The CMS indicators that decide how 93623 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

93623 compared with similar codes

How to choose

93618Arrhythmia inductionElectrical pacing

93618 reports electrical induction of arrhythmia. Use 93623 when the programmed stimulation and pacing follow an intravenous drug infusion.

93620EP evaluationRight-sided pacing

93620 describes the comprehensive EP evaluation and is a primary procedure; 93623 is an add-on for stimulation and pacing after an IV drug infusion.

93624EP follow-up studyPacing and recording

93624 describes a follow-up EP study with pacing and recording. 93623 reports stimulation and pacing after an IV drug infusion as an add-on to a primary procedure.

Codes related to 93623

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

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

Open CMS sourceHow we calculate rates