Healthcare Ancillary Healthcare Collection Specialists! At OAC we specialize in: Healthcare collections. With associates specifically trained to collect for: | Radiology Services Pathology Services Anesthesiology Services ER / Hospital Services And more.... OAC specialists are trained in the healthcare billing field and are able to explain to the patient what type of healthcare bill is past due and the difference between the technical components vs. professional components. They have a good understanding of how healthcare insurance works and can also check eligibility and knowledgeably work with insurance providers when the need arises. |  | |