Penta Screen (NY)
Test code
CPT code(s)*
Test resources
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Details
Includes
AFP, unconjugated Estriol, hCG, Dimeric Inhibin A, ITA (hyperglycosylated hCG) and Maternal Risk Interpretation
Methodology
Immunoassay (IA)
Assay category
This test code is for New York patient testing. For non-New York patient testing, use test code 15934.
Alternative name(s)
Maternal Serum Screen,Alpha-Fetoprotein, Maternal Serum
Specimen requirements | |
|---|---|
| Patient preparation | None Specified |
| Preferred specimen(s) | 4 mL serum |
| Minimum volume | 1.5 mL |
| Collection instructions | For manual orders use "Maternal Serum Screen Requisition". The Penta Screen test in pregnant women should be performed between 14.0 and 22.9 weeks gestational age, although the optimal period is 15.0-16.9 weeks. This time frame allows sufficient opportunity for further diagnostic studies if the initial Penta Screen test results are abnormal. Specimens submitted before 14.0 weeks or after 22.9 weeks gestation cannot be properly evaluated for open neural tube defects, Down syndrome or Trisomy 18. The "Maternal Serum Screen Requisition" designed to obtain patient data and the patient's informed consent must be utilized when ordering the Penta Screen test. Because the Penta Screen test results are influenced by certain patient characteristics, the following data must be provided with the specimen in order to permit accurate interpretation of results: date of collection, patient's (maternal) date of birth, patient's estimated date of delivery, patient's weight, patient's race, patient's diabetic status (is patient insulin-dependent prior to pregnancy), number of fetuses, and whether this is a repeat sample. |
| Transport container | Transport tube |
| Transport temperature | Room temperature |
| Specimen stability | Room temperature: 14 days Refrigerated: 14 days Frozen: 28 days |
| Reject criteria | Gross hemolysis • Grossly lipemic |
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
*The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.
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