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Specimen Collection Manual and Test Catalog

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EHRLICHIA CHAFFEENSIS ANTIBODIES (IGG, IGM) WITH REFLEX TO TITERS

Geisinger Epic Procedure Code:  LAB5249    Geisinger Epic ID:  207692

SPECIMEN COLLECTION
Specimen type: 

Serum


Preferred collection container: 
Alternate collection container: 
6 mL red-top (plain, non-serum separator) tube
Specimen required: 

1 mL serum; minimum 0.2 mL.



SPECIMEN PROCESSING
Processing instructions: 

Centrifuge and aliquot.


Transport temperature: 

Room temperature


Specimen stability: 

Room temperature: 7 days. Refrigerated: 14 days. Frozen: 30 days.



TEST DETAILS
CPT code(s):  86666 (x2)
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Test includes: 

If E. chaffeensis (IgG) is Detected, then E. chaffeensis (IgG) Titer will be performed at an additional charge (CPT code(s): 86317).
If E. chaffeensis (IgM) is Detected, then E. chaffeensis (IgM) Titer will be performed at an additional charge (CPT code(s): 86317).


Methodology: 
Immunofluorescence Assay
Synonyms: 

Quest test code 16197


Clinical significance: 

Ehrlichia chaffeensis Antibodies (IgG, IgM) with Reflex to Titers - This test is for the detection of IgG and IgM antibodies against Ehrlichia chaffeensis to aid in the diagnosis of Ehrlichiosis (human monocytic ehrlichiosis). Ehrlichiosis is a tickborne disease caused by transmission of the bacteria via the bite of an infected tick. It is most common in the eastern to southeastern and south-central United States.


Doctoral Director(s): 
Randin Nelson MD
Review Date:  03/17/2026

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