Ordering Recommendation

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Lavender ( K2EDTA plasma).

Specimen Preparation

Conventional specimen preparation practices frequently do not fully remove platelets from plasma and contribute to elevated TGF-b measurements. Centrifuge anticoagulated whole blood within 2 hours of collection at 1500g for 10 minutes. Collect plasma and transfer to a fresh tube. Immediately centrifuge plasma at 3000g for 10 minutes. Collect plasma from upper 2/3 of tube without disturbing lower 1/3 of tube and transfer to fresh tube for storage or transport. Separate plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL plasma to an ARUP standard transport tube. (Min 0.3 mL)

Storage/Transport Temperature

CRITICAL FROZEN.   Freeze <-20 C immediately. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions

Contaminated, severely hemolyzed, heat-inactivated or grossly lipemic specimens.


After separation from cells: Ambient: 30 minutes; Refrigerated: Unacceptable; Frozen: 60 days


Quantitative Enzyme-Linked Immunosorbent Assay (ELISA)




1-8 days

Reference Interval

1654-19951 pg/mL

Interpretive Data

Results are intended for research purposes or in attempts to understand the pathophysiology of unusual immune or inflammatory disorders.

Compliance Category

Laboratory Developed Test (LDT)


Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
3005864 Transforming Growth Factor beta1, Plasma 49853-5
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • Cytokine
  • cytokines
  • plasma TGFB1
  • TGF-b
  • TGF-beta 1
  • TGFb
  • TGFB-1
  • TGFbeta1
Transforming Growth Factor beta1, Plasma