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Test ID PTH2 Parathyroid Hormone, Serum

Useful For

Diagnosis and differential diagnosis of hypercalcemia


Diagnosis of primary, secondary, and tertiary hyperparathyroidism


Diagnosis of hypoparathyroidism


Monitoring end-stage renal failure patients for possible renal osteodystrophy

Method Name


Reporting Name

Parathyroid Hormone (PTH), S

Specimen Type


Specimen Required

Patient Preparation:

1. For 12 hours before specimen collection do not take multivitamins or dietary supplements containing biotin (vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins.

2. Patient should be fasting for 12 hours

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Specimen Minimum Volume

0.75 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Frozen (preferred) 180 days
  Refrigerated  72 hours
  Ambient  8 hours

Reference Values

<1 month: 7.0-59 pg/mL

4 weeks-11 months: 8.0-61 pg/mL

12 months-10 years: 11-59 pg/mL

11 years-17 years: 15-68 pg/mL

18 years and older: 15-65 pg/mL

Day(s) Performed

Monday through Saturday

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
PTH2 Parathyroid Hormone (PTH), S 2731-8


Result ID Test Result Name Result LOINC Value
PTH2 Parathyroid Hormone (PTH), S 2731-8

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

Report Available

Same day/1 to 3 days

NY State Approved



If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.