Specimen:
Collect
- One SST
Also Acceptable:
- One Red Top
Submit
- 3 mL (Min:1 mL) Serum in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.
Also Acceptable:
- 3 mL (Min:1 mL) Serum in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.
Special Handling
- Avoid Repeated Freeze/Thaw Cycles
- Separate serum from cells ASAP or within 2 hours of collection
- Specimen must be drawn between 14 weeks, 0 days and 24 weeks, 6 days gestation.
The recommended time for maternal serum screening is 16-18 weeks gestational.
Submit with Order:
Patient's date of birth, current weight, due date, dating method (US, LMP), number of fetuses present, patient's race, if the patient was diabetic at the time of conception, if there is a known family history of neural tube defects, if the patient has had a previous pregnancy with a trisomy, if the patient is currently smoking, if the patient is taking valproic acid or carbamazepine (Tegretol), if this is a repeat sample, and the age of the egg donor if in vitro fertilization.
Rejection Criteria
- Hemolyzed specimens
- Plasma
Stability
Ambient: 3 Day(s); Refrigerated: 2 Week(s); Frozen: 12 Month(s); Incubated: Unacceptable
Methodology
- Quantitative Chemiluminescent Immunoassay
Performed
Sun-Sat
Reported
3-5 Day(s)
CPT Codes
- 82105
- 82677
- 84702
- 86336
Interpretive Data
Please see report for interpretive data.
Components
- 93169 - Patients AFP
- 93202 - Est. Due Date
- 93206 - MoM FOR DIA
- 93207 - Patients DIA
- 93238 - Maternal Weight
- 93239 - MoM for AFP
- 93240 - Interpretation
- 93241 - SPECIMEN
- 93242 - DATING
- 93243 - Mat. Insulin DM
- 93244 - Family Hx of NTD
- 93245 - Maternal Race
- 93246 - Number of Fetuses
- 93248 - Maternal Age
- 93249 - Patients hCG
- 93251 - MoM for hCG
- 93252 - Gestational Age
- 93253 - Patients uE3
- 93255 - MoM for uE3
- 91593 - Hx of Aneuploidy
- 90059 - EER SCREEN
- 92052 - SMOKING
Last Updated: August 30, 2025 @ 9:13 am
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