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
A patient on vancomycin for MRSA bacteremia develops creatinine rise from 0.8 to 2.1 mg/dL. The physician documents 'drug-induced nephropathy.' What additional documentation should the CDS seek?
Answer: The specific drug name and whether it is an adverse effect or poisoning
Accurate coding requires identifying the specific causative drug and classifying the encounter as an adverse effect (drug taken correctly) versus a poisoning or underdosing, as this affects the T-code selection paired with the nephropathy code.
Which clinical scenario best supports documentation of 'pre-renal AKI' for coding and clinical purposes?
Answer: BUN/Cr ratio >20:1 with rapid creatinine normalization after IV fluid resuscitation
A BUN-to-creatinine ratio >20:1 combined with prompt creatinine normalization following fluid administration is the hallmark clinical picture of pre-renal AKI due to volume depletion or reduced renal perfusion.
A CDS review identifies that a patient had continuous renal replacement therapy (CRRT) for 4 days but the record only documents 'electrolyte management.' What is the appropriate CDS action?
Answer: Query the physician to document the reason for CRRT and whether AKI or CKD Stage 5 was the indication
CRRT is a significant procedure that requires physician documentation of the clinical indication (typically AKI Stage 3 or ESRD) to support accurate diagnosis coding and appropriate DRG assignment.
Under the Uniform Hospital Discharge Data Set (UHDDS) guidelines, when should AKI be coded as a secondary diagnosis?
Answer: When it affects patient care, requires clinical evaluation, or prolongs the length of stay
UHDDS defines additional diagnoses as conditions that affect patient care in terms of requiring clinical evaluation, therapeutic treatment, diagnostic procedures, extended length of stay, or increased nursing care and monitoring.
A patient is admitted with AKI and recovers renal function before discharge. The discharge summary states 'resolved AKI.' How should this be coded?
Answer: Code AKI as a secondary diagnosis because it was present and treated during the encounter
Conditions that are diagnosed and treated during the hospitalization are coded even if resolved at discharge, as they affected patient care and management during the encounter.
Which laboratory finding, when documented by the physician as clinically significant, most directly supports querying for hyperkalemia as a complication of AKI?
Answer: Serum potassium of 6.1 mEq/L with peaked T-waves on ECG
A serum potassium of 6.1 mEq/L with ECG changes represents clinically significant hyperkalemia, a known complication of AKI due to impaired renal potassium excretion, warranting physician documentation and separate coding.
When a patient with documented AKI Stage 2 does not recover baseline renal function at discharge and is discharged with a GFR of 28 mL/min, what documentation should the CDS query for?
Answer: Whether the patient now meets criteria for CKD and at what stage
When AKI does not fully resolve, the physician should document whether the patient has developed or worsened CKD, as a GFR of 28 mL/min corresponds to CKD Stage 4 and would be coded alongside AKI to reflect the transition from acute to chronic kidney disease.