Medical Coding Practice Test

Cancer registries primarily use M codes in ICD-9-CM. M codes in ICD-9-CM are specifically designed to classify neoplasms (tumors) and are crucial for cancer registries to track and analyze cancer data. Physicians in clinical settings may use M codes as well, but the primary users for M codes are cancer registries for their focus on cancer-related conditions. Health insurance companies and government health agencies typically use different types of codes for various purposes, not specifically M codes related to neoplasms.