Nonesterified Fatty Acids (Free Fatty Acids)
Test code
CPT code(s)*
Test resources
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Details
Methodology
Spectrophotometry (SP) • Enzymatic
Alternative name(s)
Free Fatty Acids,NEFA
Specimen requirements | |
|---|---|
| Patient preparation | Overnight fasting is preferred |
| Preferred specimen(s) | 1 mL frozen serum |
| Alternative specimen(s) | Serum collected in: No additive (royal blue-top) tube • Plasma collected in: EDTA (lavender or royal blue-top) tube, 3.2% sodium citrate (light blue-top) tube, ACD solution B (yellow-top) tube, sodium fluoride or potassium oxalate (gray-top) tube, PTH-related protein (special collection tube), ACTH (lavender-top) tube, or PPT potassium EDTA (white-top) tube |
| Minimum volume | 0.3 mL |
| Collection instructions | Serum or plasma should be removed from cells immediately after collection |
| Transport container | Transport tube |
| Transport temperature | Frozen |
| Specimen stability | Room temperature: Unacceptable Refrigerated: 2 hours Frozen: 30 days |
| Reject criteria | Received thawed • Received refrigerated • Heparin plasma and patients on heparin therapy |
Reference Range(s)
| Newborns | <2.3 mmol/L |
| 1-12 Months | 0.50-1.60 mmol/L |
| 1-7 Years | 0.60-1.50 mmol/L |
| 8-17 Years | 0.20-1.10 mmol/L |
| Adults | 0.07-0.88 mmol/L |
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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