Ordering RecommendationRecommendations when to order or not order the test. May include related or preferred tests.
Prognostication and monitoring in NSCLC.
MnemonicUnique test identifier.
CYFRA
MethodologyProcess(es) used to perform the test.
Quantitative Enzyme-Linked Immunosorbent Assay
PerformedDays of the week the test is performed.
Wed
ReportedExpected turnaround time for a result, beginning when ARUP has received the specimen.
1-8 days The level of CYFRA 21-1 cannot be used as absolute evidence for the presence or absence of disease.
New York DOH Approval StatusIndicates test has been approved by the New York State Department of Health.
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Plain red or serum separator tube.
Specimen Preparation
Allow serum specimen to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Storage/Transport Temperature
Refrigerated.
Unacceptable Conditions
Plasma. Icteric, lipemic, or hemolyzed specimens.
Remarks
Stability
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 2 months (avoid repeated freeze/thaw cycles)
Reference IntervalNormal range/expected value(s) for a specific disease state. May also include abnormal ranges.
0.0-2.3 ng/mL
Interpretive DataBackground information for test. May include disease information, patient result explanation, recommendations, details of testing, associated diseases, explanation of possible patient results.
This assay is performed using the Fujirebio Diagnostics CYFRA 21-1 Enzyme Immunoassay. Results obtained with different assay methods or kits cannot be used interchangeably. Results cannot be interpreted as absolute evidence of the presence or absence of malignant disease.
Compliance Category
FDA
NoteAdditional information related to the test.
Hotline History
N/A
CPT CodesThe American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* 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.
AliasesOther names that describe the test. Synonyms.
CYFRA 21-1 (Cytokeratin 19 Fragment (CYFRA 21-1), Serum)
Soluble Cytokeratin 19 Fragment (Cytokeratin 19 Fragment (CYFRA 21-1), Serum)
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