403.10 is a legacy non-billable code used to specify a medical diagnosis of hypertensive chronic kidney disease, benign, with chronic kidney disease stage i through stage iv, or unspecified. This code was replaced on September 30, 2015 by its ICD-10 equivalent.
NIH: National Institute of Diabetes and Digestive and Kidney Diseases
NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
You have two kidneys, each about the size of your fist. Their main job is to filter wastes and excess water out of your blood to make urine. They also keep the body's chemical balance, help control blood pressure, and make hormones.
Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
CKD can get worse over time. CKD may lead to kidney failure. The only treatment options for kidney failure are dialysis or a kidney transplantation.