PTH, Intact and Calcium
Quest Diagnostics
Sample type: Serum
Requires fasting: No
Phlebotomy required
Details
PTH, Intact and Calcium - The assay is useful in making the diagnosis of primary hyperparathyroidism, secondary hyperparathyroidism, and a differential diagnosis of hypercalcemia. The assay helps in distinguishing hypercalcemia cause by either primary hyperparathyroidism or malignant disease.
- Calcium
- Parathyroid Hormone, Intact
Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected
3–5 business days
Age Male (mg/dL) Female (mg/dL)
<1 Month 8.4–10.6 8.4–10.6
1–11 Months 8.7–10.5 8.7–10.5
1–3 Years 8.5–10.6 8.5–10.6
4–19 Years 8.9–10.4 8.9–10.4
20–49 Years 8.6–10.3 8.6–10.2
>49 Years 8.6–10.3 8.6–10.4
Parathyroid Hormone, Intact
<1 Year 8–70 pg/mL
1–7 Years 14–66 pg/mL
8–18 Years 14–85 pg/mL
≥19 Years 16–77 pg/mL
Interpretive Guide
Condition Intact PTH Calcium
Normal Parathyroid Normal Normal
Hypoparathyroidism Low or Low Normal Low
Hyperparathyroidism
Primary Normal or High High
Secondary High Normal or Low
Tertiary High High
Non-Parathyroid
Hypercalcemia Low or Low Normal High
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): 1.5 mL plasma collected in EDTA (lavender-top) tube for the PTH, Intact AND 1 mL serum for the Calcium
- Alternative: NA
- Minimum Volume: NA
- Collection Instructions: NA
- Transport Container: Transport tube
- Transport Temperature: Refrigerated (Cold Packs)
- Specimen Stability:
- Room temperature: PTH, Intact: 48 hours; Calcium: 7 days
- Refrigerated: PTH, Intact: 72 hours; Calcium: 7 days
- Frozen: PTH, Intact: 24 hours; Calcium: 28 days
- Reject Criteria:
- Gross hemolysis • Grossly lipemic • Plasma submitted in sodium heparin (green-top) tube or lithium heparin (green-top) tube
State restrictions:
Patient can't order this test if they are located in Hawaii, Puerto Rico, New Jersey, New York, or Rhode Island
