Cystine Quantitative, Urine
0081106
Ordering Recommendation
Use for monitoring treatment of patients previously diagnosed with cystinuria. To diagnose or rule out cystinuria, refer to Cystinuria Panel (0081105) or Amino Acids Quantitative by LC-MS/MS, Urine (2009419).
Mnemonic
QNT CYS U
Methodology
Liquid Chromatography/Tandem Mass Spectrometry
Performed
Mon-Fri
Reported
3-7 days  
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
  
Collect
24-hour or other timed urine collection. Avoid dilute urine when possible. Refrigerate 24-hour/timed specimens during collection.  
Specimen Preparation
Mix urine well. Transfer 4 mL aliquot urine to ARUP Standard Transport Tubes and freeze immediately. (Min: 3 mL) Record total volume and collection time interval on transport tube and test request form.  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Refrigerated or room temperature specimens.  
Remarks
Clinical information is needed for appropriate interpretation. Additional required information includes age, gender, diet (eg, TPN therapy), drug therapy, and family history. Biochemical Genetics Patient History Form is available on the ARUP Web site or by contacting ARUP Client Services.  
Stability
Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month  
Reference Interval
By report
 
0 -​ 2 months 3 -​ 8 months 9 months -​ 2 yr 3 -​ 12 yr 13 yr and older
14 -​ 573 umol/g CRT 28 -​ 461 umol/g CRT 34 -​ 186 umol/g CRT 26 -​ 98 umol/g CRT 12 -​ 81 umol/g CRT
Interpretive Data
 
Note
This test is indicated only to monitor patients with cystinuria on therapy.
CPT Code(s)
82131
Components
Component Test Code*Component Chart NameLOINC
0020533Creatinine, Urine2161-8
0081107Cystine, Urine - Quantitative56677-8
0081219Cystine, 24 Hour Urine2179-0
0081220Cystine, Urine - per volume32169-5
0097110Total Volume19153-6
0097111Hours Collected30211-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Urine cystine