Platelet Count

Cleveland HeartLab P, Test


CPT Code: 85049
Order Code: 1380
ABN Requirement: No
Specimen: EDTA Whole Blood
Volume:  1.0 mL
Minimum Volume:  0.5 mL
Container: EDTA (Lavender Top tube)


  1. Collect and label sample according to standard protocols.
  2. Gently invert tube 8-10 times immediately after draw. DO NOT SHAKE.
  3. Do not centrifuge.

Transport: Store EDTA whole blood at 2°C to 8°C after collection and ship the same day per packaging instructions provided with the Cleveland HeartLab shipping box.


Ambient (15-25°C): Not Acceptable
Refrigerated (2-8°C):
5 days
Frozen (-20°C):
Not Acceptable
Deep Frozen (-70°C):
Not Acceptable

Causes for Rejection: Specimens other than EDTA whole blood; improper labeling; samples not stored properly; samples older than stability limits; clotted samples; grossly hemolyzed samples; samples drawn from above an IV

Methodology: Flow Cytometry

Turn Around Time:  1 to 3 days

Reference Range:

TestAge/GenderReference Range
PlateletAll Ages150-400 K/uL

Critical Values:

TestAgeCritical Value
Platelet CountAll Ages≤40 K/µL, ≥1000 K/µL

Use: A platelet count is used to identify the cause of excess bleeding, and for the diagnosis of a number of conditions, including bone marrow disease or clotting disorders.

Limitations: Megakaryocytes, giant platelets, clumped platelets or platelet satellitism may falsely decrease the platelet count. Fibrin clots may affect the platelet count. Elevated platelet levels may occur after splenectomy.

Additional Information:  A platelet count may be performed on samples collected from sodium citrate anticoagulant tubes (light blue top) when results from EDTA (purple top) exhibit platelet clumping or platelet satellitism.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.