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Is code 93600 allowed with the 93650 per this documentation? If so, is the bundle of His allowed with all AV node ablation procedures? "The existing biventricular pacemaker was interrogated, revealing stable lead parameters. Reprogrammed to VVI 40 for the duration of the procedure. An 8 French sheath was placed in the right femoral vein. An 8 mm tip temp control ablation cath was advanced to the right atrium via the 8 French sheath. The ablation cath was advanced to the region of the His bundle, taking care to avoid the chronic pacing leads. The cath was then withdrawn posteriorly and inferiorly to the region of the compact AV node using a combination of intracardiac electrograms and fluoroscopy. Radiofrequency energy was then applied. During radiofrequency application, complete heart block was obtained. Following ablation, there was evidence of a stable junctional escape rhythm at 45 bpm. There remained no evidence of antegrade AV conduction after a 30-minute observation period. End of procedure. Pacemaker was interrogated, revealing stable lead parameters and reprogrammed."