🎗️ Chapter 2 · C00-D49
Cancer & Tumors Diagnosis Codes
Neoplasm codes document all types of abnormal tissue growth, from benign cysts to malignant cancers. These codes are critical for treatment planning, insurance coverage for chemotherapy and surgery, and cancer registry reporting that helps researchers improve outcomes.
About This Chapter
Chapter 2 of the ICD-10-CM classification covers neoplasms, spanning codes C00-D49. These codes are used by healthcare providers to document diagnoses in your electronic health record (EHR), on insurance claims, and on medical bills.
Why this matters: If you see a code starting with C on your medical bill or health records, it likely falls in this chapter. Understanding what chapter your code belongs to can help you make sense of your diagnosis and ask better questions at your next appointment.
Diagnosis Codes in This Chapter
Browse the 9 diagnosis codes we currently cover in this chapter. Select any code to read a plain-English explanation.