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Test ID FNTPX N-Telopeptide, Cross-Linked, Serum

Method Name

Quantitative Enzyme-Linked Immunosorbent Assay (ELISA)

Reporting Name

N-Telopeptide, Cross-Linked, Serum

Specimen Type


Specimen Required

Draw blood in a plain, red-top tube(s). (Serum gel tube is acceptable.) Spin down and send 0.5 mL serum frozen in a plastic vial.

Specimen Minimum Volume

0.2 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Frozen (preferred) 180 days
  Refrigerated  24 hours
  Ambient  5 hours

Reference Values

Adult Male: 5.4-24.2 nM BCE
Premenopausal, Adult Female: 6.2-19.0 nM BCE


The target value for treated post-menopausal adult females is the same as the premenopausal reference interval.


BCE = Bone Collagen Equivalent

Day(s) and Time(s) Performed

Monday, Wednesday, Friday

Performing Laboratory

ARUP Laboratories

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FNTPX N-Telopeptide, Cross-Linked, Serum 21215-9


Result ID Test Result Name Result LOINC Value
Z2645 N-Telopeptide, Cross-Linked, Serum 21215-9