Abnormal results of kidney function studies

This code indicates laboratory findings that deviate from the normal range for kidney function, such as elevated creatinine, blood urea nitrogen (BUN), or abnormal glomerular filtration rate (GFR) estimations. It signifies that diagnostic tests suggest impaired renal function without specifying an underlying disease.

Assign this code when documentation indicates abnormal kidney function test results, and a definitive diagnosis for the underlying renal condition has not yet been established or confirmed. It is appropriate for initial encounters or when monitoring patients with known kidney disease whose lab values are outside the expected range.

• Do not use this code as a primary diagnosis if a definitive diagnosis for the kidney condition (e.g., chronic kidney disease, acute kidney injury) is known and documented.
• Always sequence this code after any definitive diagnosis for the underlying cause of the abnormal results, if applicable.
• Ensure documentation clearly states the specific abnormal lab values and that they pertain to kidney function.