A system may receive a proposed medical diagnosis of a patient, and automatically identify potential medical services to be performed with respect to the patient. The identified medical services may be deemed relevant to the proposed medical diagnosis, which the system may determine from a customizable decision table. Further, the system may receive selection of a potential medical service from the identified potential medical services, and present an automated, real-time indication regarding paying entity/plan coverage and estimated cost and/or quality metrics for the selected medical service based on the patient and paying entity/plan of the patient. In addition, the system may facilitate selection of a lab/facility to perform the selected medical service. To communicate across clinicians, labs/facilities and paying entities, the system may employ a catalog of medical services spanning multiple clinicians, labs/facilities or paying entities/plans to thereby integrate their nomenclatures, and may employ a coding system in this regard.