Medical Billing Companies, Medical Billing Services California US | RadianzTech RadianzTech We Are the Experienced, Reliable Billing Collections Experts, Healthcare Billing Solutions Services in California US. At RadianzTech, we offer comprehensive medical billing services aimed at optimizing your practice’s revenue cycle management. Our team of experts means that while you can continue providing excellent care to your patients, we take care of the difficult tasks such as billing and coding. Below is an overview of our key services.