Acute Kidney Injury and Renal Documentation Flashcards
7 cards from real CCDS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Acute Kidney Injury and Renal Documentation flashcards as text
According to KDIGO criteria, Stage 1 AKI is defined as an increase in serum creatinine of at least how much within 48 hours?
Answer: 0.3 mg/dL
KDIGO defines Stage 1 AKI as a serum creatinine increase of ≥0.3 mg/dL within 48 hours or ≥1.5 times the patient's baseline within 7 days.
Which ICD-10-CM code for acute kidney injury is classified as a Major Complication or Comorbidity (MCC)?
Answer: N17.0 - Acute kidney failure with tubular necrosis
N17.0 (acute kidney failure with tubular necrosis) is classified as an MCC, while N17.9 (unspecified AKI) is only a CC, making specificity critical for MS-DRG impact.
According to KDIGO urine output criteria, which finding is consistent with Stage 2 AKI?
Answer: Less than 0.5 mL/kg/hr for more than 12 hours
KDIGO Stage 2 AKI by urine output is defined as less than 0.5 mL/kg/hr for more than 12 consecutive hours.
When a patient has both acute kidney injury and underlying chronic kidney disease documented, what is the correct ICD-10-CM coding approach?
Answer: Assign codes for both AKI and CKD to capture the complete clinical picture
ICD-10-CM guidelines instruct coders to assign separate codes for both AKI (N17.x) and CKD (N18.x) when both conditions are present and documented.
Which clinical indicator would most support a CDI query for acute kidney injury in a hospitalized patient?
Answer: Serum creatinine rise of 0.4 mg/dL above baseline within 36 hours
A creatinine increase of 0.4 mg/dL above baseline within 36 hours exceeds the KDIGO Stage 1 threshold of ≥0.3 mg/dL within 48 hours, supporting an AKI query.
Which type of AKI etiology is most commonly associated with contrast-induced nephropathy?
Answer: Intrinsic (intrarenal) AKI from tubular injury
Contrast-induced nephropathy causes direct tubular cell injury, classifying it as intrinsic (intrarenal) AKI rather than pre-renal or post-renal.
Why is it important for CDI specialists to query for a specific type of acute kidney injury rather than accepting 'acute kidney failure, unspecified'?
Answer: Specific AKI types such as tubular necrosis are MCCs while unspecified AKI is only a CC
N17.0 (tubular necrosis) is classified as an MCC while N17.9 (unspecified AKI) is only a CC, meaning specificity directly impacts MS-DRG weight and reimbursement.