Medical Coding Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What are M codes used for in ICD-9-CM?

Identify anesthesia codes

Identify neoplasm behavior and cell type

M codes in ICD-9-CM are used to identify neoplasm behavior and cell type. Neoplasm behavior codes describe whether a tumor is benign, in situ, malignant, etc., while neoplasm cell type codes specify the histology or cellular composition of the tumor. This information is crucial for accurately coding and classifying cancer diagnoses in medical records. The other options listed do not align with the purpose and usage of M codes in ICD-9-CM.

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Identify cardiovascular conditions

Identify infectious diseases

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