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Test Code COAG INR AND PTT, GROUP TEST

Additional Codes

Software Test Code
Label Text                                               COAG                                                               
EPIC LAB510519

Performing Laboratory

NorDx Laboratories

Useful For

Group test to facilitate collecting one tube and freezing the plasma when PT and PTT are both ordered.

Method Name

Clot-Based Assay

Reference Values

See individual analytes

Days and Times Test Performed

Monday through Sunday

Report Available

1 Day

Specimen Type

Plasma

Preferred Container

Light Blue Top Tube (Sodium Citrate) – Tube must be full at time of collection.

Preferred Volume

Plasma: 1 mL (Light Blue Top Tube (Sodium Citrate)) – per aliquot

Minimum Volume

Plasma: 0.5 mL (Light Blue Top Tube (Sodium Citrate))

Specimen Collection and Handling

1. Draw blood light blue-top (3.2% sodium citrate) tube(s). Tube(s) must be full upon collection.

2. Separate plasma from cells within 4 hours of collection in a centrifuge at 2,500 rpm for 15 minutes or 3,000 rpm for 10 minutes.

3. Using a plastic transfer pipette (do not use a glass pipette) divide the specimen into as many 0.5-1.0 mL aliquots as possible and cap the vial(s) tightly. (Glass vials will not be accepted.)

4. Freeze specimen(s) immediately at = < -20º C.

5. Send specimen(s) frozen on dry ice.

Click here to view the Procedure for Collecting a Specimen from an A-line

Specimen Stability Information

Specimen Type: Plasma

Refrigerated: 4 Hours

Must be spun/separated within: 4 Hours

Note: 2 Weeks (-20° C) or Indefinitely (-70° C). Frozen Note: To store/freeze @ -70°C and specimen must be double spun/ aliquoted prior to storage.

Add On Capable

Yes

CPT Code Information

CPT Code

CPT Description

CPT Disclaimer
85610 Prothrombin Time  
85730 Thromboplastin Time, Partial (PTT), Plasma or Whole Blood  

Performing Laboratory Location

NorDx Laboratories

Rejection Information

Under filled (<90 ), clotted, or grossly hemolyzed

Note: Patients with a Hematocrit >55 will require recollection in an citrate-adjusted tube.

Advance Beneficiary Notice Requirements

This test, when ordered on Medicare patients, is subject to the National Coverage Determination (NCD) policies. Please verify that the diagnosis code (ICD code) you have chosen demonstrates medical necessity for the test as documented in the physician’s patient record. The CMS web site is available to assist you with this verification. A properly executed Advance Beneficiary Notice (ABN) must be submitted with the specimen if medical necessity is not demonstrated by the ICD code chosen.

Profile Information

Individual Test Description
PARTIAL THROMBOPLASTIN TIME (PTT), PLASMA
PROTHROMBIN TIME (PT), INR, PLASMA