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Test Code MISCLM Cystatin C with Estimated GFR, Serum

Additional Codes

MAYO Test ID
CYSTC
EPIC Test ID
LAB2608

 

Reporting Name

Cystatin C with Estimated GFR, S

Useful For

Cystatin C:

An index of glomerular filtration rate, especially in patients where serum creatinine may be misleading (eg, very obese, elderly, or malnourished patients)

 

Assessing renal function in patients suspected of having kidney disease

 

Monitoring treatment response in patients with kidney disease

 

Estimated Glomerular Filtration Rate (eGFR):

An index of GFR, especially in patients where serum creatinine may be misleading (eg, very obese, elderly, or malnourished patients); for such patients, use of CKD-EPI cystatin C equation is recommended to estimate GFR

 

Assessing renal function in patients suspected of having kidney disease

 

Monitoring treatment response in patients with kidney disease

Method Name

Immunoturbidimetric

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Serum


Specimen Required


Container/Tube:

Preferred: Red top

Acceptable: Serum gel

Specimen Volume: 1 mL


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 7 days
  Ambient  7 days
  Frozen  7 days

Reject Due To

Hemolysis

Mild OK; Gross reject

Lipemia

Mild OK; Gross OK

Icterus

NA

Other

NA

Reference Values

CYSTATIN C

Males:

0 days-22 years: no reference values established

23-29 years: 0.60-1.03 mg/L

30-39 years: 0.64-1.12 mg/L

40-49 years: 0.68-1.22 mg/L

50-59 years: 0.72-1.32 mg/L

60-69 years: 0.77-1.42 mg/L

70-79 years: 0.82-1.52 mg/L

>79 years: no reference values established

Females:

0 days-22 years: no reference values established

23-29 years: 0.57-0.90 mg/L

30-39 years: 0.59-0.98 mg/L

40-49 years: 0.62-1.07 mg/L

50-59 years: 0.64-1.17 mg/L

60-69 years: 0.66-1.26 mg/L

70-80 years: 0.68-1.36 mg/L

81-86 years: 0.70-1.45 mg/L

>86 years: no reference values established

 

eGFR

>60 mL/min/BSA

eGFR will not be calculated for patients under 18 years.

Day(s) and Time(s) Performed

24 hours per day, 7 days per week

CPT Code Information

82610

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CYSTC Cystatin C with Estimated GFR, S 87430-5

 

Result ID Test Result Name Result LOINC Value
EGFRC eGFR by Cystatin C 50210-4
CYSC Cystatin C, S 33863-2

Analytic Time

1 day

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

Forms

If not ordering electronically, complete, print, and send a Cardiovascular Test Request Form (T724) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/cardiovascular-request-form.pdf).