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Test Compendium


Test Code

  • 3151

Test Synonym

  • Gentamicin; Garamycin (R); Gentak®


  • 1 mL

Minimum Volume

  • 0.3 mL

Specimen Requirements

  • Serum Or Plasma


  • Plain Red Top Tube, Green Top Tube, Transfer Tube- Serum, Transfer Tube- Plasma


  • Refrigerated

CPT Codes

  • 80170
    *The CPT codes provided are based on AMA guidelines and are provided for informational purposes only. CPT coding is the responsibility of the billing entity. Please direct any questions regarding the CPT coding to the payer being billed.

Special Instructions

  • 1 mL serum from a red top or heparin plasma. SST serum not acceptable.

Additional Information

  • Red-stopper tube or green-stopper (heparin) tube. Do not use serum-separator tube, the use of serum-separator tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant. Both peak and trough concentrations should be monitored. The trough sample is drawn immediately prior to the next dose. Peak samples should be drawn 45-60 minutes after an I.M. injection, 30 minutes after the end of a 30-minute I.V. infusion or immediately after a 60-minute I.V. infusion. Transfer separated serum or plasma to a plastic transfer tube.

Specimen Stability

  • AMBIENT: 14 days REFRIGERATED: 14 days FROZEN: 14 days