ICD Code C79.9

ICD code C79.9 is secondary cancer (metastasis) found in an unspecified location in the body.

1. Presence of a confirmed primary malignant neoplasm (cancer) at a known site

2. Evidence or clinical suspicion of metastatic disease (spread of cancer)

3. Metastatic site is identified, but the specific location of the secondary malignancy is not specified or cannot be determined

4. No documentation of the exact organ or tissue involved by the secondary malignancy

5. Symptoms or findings consistent with metastatic cancer, such as unexplained weight loss, pain, or abnormal imaging results, without a clearly identified secondary site

Relevant CPT codes that may be used to treat ICD code C79.9 include:

- 96413: Chemotherapy administration, intravenous infusion technique; up to 1 hour, single or initial substance/drug

- 96415: Chemotherapy administration, intravenous infusion technique; each additional hour

- 96417: Chemotherapy administration, intravenous infusion technique; each additional sequential infusion (different substance/drug), up to 1 hour

- 96365: Intravenous infusion, for therapy, prophylaxis, or diagnosis (specify substance or drug); initial, up to 1 hour

- 96372: Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscular

- 99221-99223: Initial hospital care, per day, for the evaluation and management of a patient

- 99231-99233: Subsequent hospital care, per day, for the evaluation and management of a patient

- 77014: Computed tomography guidance for placement of radiation therapy fields

- 77280-77295: Therapeutic radiology simulation-aided field settings

- 77300-77334: Radiation treatment planning and devices

These CPT codes are commonly associated with the treatment and management of conditions billed under ICD code C79.9. Always verify payer-specific guidelines and clinical documentation to ensure appropriate code selection.

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