Ordering Recommendation

Evaluate possibility of a fetal open neural tube defect at 13-36 weeks of gestation.

Mnemonic
AF AFP
Methodology

Quantitative Chemiluminescent Immunoassay/Electrophoresis

Performed

Sun-Sat

Reported

3-4 days
Reflex: 3-11 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation

Amniocentesis. Specimen must be drawn between 13 weeks, 0 days and 36 weeks, 6 days gestation.

Collect

Amniotic fluid.

Specimen Preparation

Transport 2.5 mL amniotic fluid. (Min: 1.5 mL)

Storage/Transport Temperature

Room temperature.

Unacceptable Conditions
Remarks

Submit with Order: Gestational age at time of collection or estimated due date.

Stability

Ambient: 1 month; Refrigerated: 3 months; Frozen: 3 months

Reference Interval
Test Number
Components
Reference Interval
  AFP, Amniotic Fluid By report
Ranges are based upon the weeks of gestation.
2006848 Acetylcholinesterase and Fetal Hemoglobin, Amniotic Fluid Acetylcholinesterase: Negative
Fetal Hemoglobin: Negative
  Multiple of Median 1.99 or less

Interpretive Data

Refer to report.

Compliance Statement B: For laboratory developed tests not using a RUO kit, and for FDA approved, cleared or 510(k) exempt assays with alterations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Note

Information must include weeks of gestation. If the AFP (amniotic fluid) is elevated, then Acetylcholinesterase will be added. Additional charges apply. Acetylcholinesterase testing requires an additional 3-11 days to be reported.

Hotline History
N/A
CPT Codes

82106; if reflexed, add 82013 and 83033

Components
Component Test Code* Component Chart Name LOINC
0080015 AFP, Amniotic Fluid 1832-5
0080929 AFP AF Interpretation 41273-4
3000162 AFP, AF MoM 29595-6
3000263 Gestational Age Calculated at Collection 18185-9
* 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
  • AFP
  • AFP-AF (Alpha-Fetoprotein, Amniotic Fluid)
  • Alpha Fetoprotein, Amniotic Fluid
  • Alpha-Fetoprotein, Amniotic Fluid
  • Fetoprotein, Amniotic Fluid
Alpha Fetoprotein (Amniotic Fluid) with Reflex to Acetylcholinesterase and Fetal Hemoglobin