Final answer:
The correct ICD codes for this patient's diagnosis of primary sigmoid colon cancer and metastatic peritoneal lesions are C78.6 for the peritoneum and C18.8 for the primary site in the sigmoid colon. The correct combination of ICD codes for this case is C78.6, C78.5, C18.8.
Therefore, the correct answer is d) C78.6, C78.5, C18.8.
Step-by-step explanation:
The question relates to coding diagnoses for a patient with a medical history that includes malignant ascites, widespread metastatic peritoneal lesions, and a primary site of cancer in the sigmoid colon with a sigmoid colon resection performed six months ago. In medical billing and coding, specifically within the ICD (International Classification of Diseases) system, diagnoses and medical conditions are assigned unique codes that correspond to specific conditions. For the diagnoses given:
- C78.6 is the code for secondary malignant neoplasm of the retroperitoneum and peritoneum, which would apply to the metastatic peritoneal lesions and malignant ascites.
- C78.5 is the code for secondary malignant neoplasm of the large intestine and rectum, not the peritoneum.
- C18.9 is the code for malignant neoplasm of the colon, unspecified, which would likely correspond to the history of sigmoid colon cancer.
Given the patient's history of primary sigmoid colon cancer (C18.9), and metastatic disease in the peritoneum (C78.6), the correct ICD codes should reflect these diagnoses. Based on the options provided, the answer would be:
a) C78.6, C78.7 (wrong code for metastatic peritoneum), C18.9
b) C78.6, C78.5 (wrong code for metastatic peritoneum), C18.9
c) C78.6, C78.7 (wrong code for metastatic peritoneum), C18.8 (wrong code for sigmoid colon)
d) C78.6, C78.5, C18.8 (Correct combination for metastatic peritoneum and primary sigmoid colon cancer)
Therefore, the correct answer is d) C78.6, C78.5, C18.8.