If a physician documents a patient as having "chronic renal insufficiency," what coding should not be applied?

• A. Chronic kidney disease, unspecified
• B. Chronic kidney disease, stage 1
• C. Chronic renal disease, unspecified
• D. Chronic renal insufficiency

Answer: (B)

When a physician documents a patient as having "chronic renal insufficiency," the term specifically refers to a chronic condition affecting the kidney's function. In coding and documentation, it is essential to accurately reflect the severity and stage of kidney disease based on clinical definitions.

Choosing to apply "chronic kidney disease, stage 1" implies that the patient's kidney function is only mildly impaired (with a glomerular filtration rate [GFR] of 90 or greater) and does not align with the term "chronic renal insufficiency," which can indicate a more general categorization without necessarily having defined stages. Chronic renal insufficiency does not provide the specific parameters to categorize the condition as stage 1; instead, it suggests a more general decline in kidney function that might not fit strictly within the precise descriptions of staged chronic kidney disease.

The other coding choices—chronic kidney disease, unspecified; chronic renal disease, unspecified; and chronic renal insufficiency—are more appropriate for the documentation as they can accept a broader interpretation of renal impairment and do not suggest a level of functionality that stage 1 requires. Hence, selecting stage 1 does not capture the nature of the physician's documentation accurately.