Potassium, RBC
Quest Diagnostics
Sample type: Whole blood
Requires fasting: No
Phlebotomy required
Details
This test assesses potassium levels red blood cells to determine intracellular potassium status, which may provide a more accurate assessment of total body potassium levels than serum analysis.
- Potassium, RBC [moles/volume]
Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected
Potassium, RBC - This test assesses potassium levels red blood cells to determine intracellular potassium status, which may provide a more accurate assessment of total body potassium levels than serum analysis.
2–5 business days
Blood Draw Options with Fullscript
Fullscript offers several convenient phlebotomy options to complete your lab testing:
Quest Diagnostics Patient Service Centers (PSC)
- Location: Visit a nearby Quest Diagnostics Patient Service Center.
- Cost: $10 sample collection fee (paid during lab order checkout).
- Scheduling: Schedule your appointment here. Appointments are recommended to reduce wait times. Walk-ins are accepted, but may experience delays. Aim to arrive 10 minutes before your appointment.
- Collection Instructions:
- Bring a valid ID.
- Bring your digital or printed requisition form, available in the Labs tab of your Fullscript account.
- Check-in: Scan the QR code from your confirmation email or follow kiosk instructions.
- More Info: Quest Diagnostics blood draw guide
Getlabs Mobile Phlebotomy
- Location: Sample collection at your home or office.
- Cost: $85 sample collection fee (paid during lab order checkout).
- Availability: Available in most locations – enter your ZIP code during checkout to confirm.
- Scheduling: Schedule your appointment here through your Fullscript account.
- Collection Instructions:
- Have your digital or printed requisition form and valid ID ready.
- Your phlebotomist will contact you by phone to coordinate arrival.
- More Info: Getlabs blood draw guide
- Preferred Specimen(s): 4 mL whole blood collected in a sodium heparin or lithium heparin (green-top) tube AND 4 mL whole blood collected in an EDTA (lavender-top) tube
- Alternative: NA
- Minimum Volume: 1.5 mL
- Collection Instructions: NA
- Transport Container: EDTA (lavender-top) tube; Sodium heparin (green-top) tube
- Transport Temperature: Room Temperature
- Specimen Stability:
- Room temperature: 48 hours
- Refrigerated: 48 hours
- Reject Criteria:
- Hemolysis
State restrictions:
Patient can't order this test if they are located in Hawaii, Puerto Rico, New Jersey, New York, or Rhode Island
