ARUP's Laboratory Test Directory

Isohemagglutinin Titer, IgM : 2000270

Mnemonic: IRL ISO M

Methodology: Hemagglutination
Performed: Mon-Fri
Reported: 1-3 days
Specimen Required: Collect: Plain red, lavender (EDTA), or pink (K2EDTA).

Specimen Preparation: Do not freeze red cells. Transport 7 mL whole blood. (Min: 3 mL)

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Separator or gel tubes.

Stability (collection to initiation of testing): Ambient: 72 hours; Refrigerated: 1 week; Frozen: Unacceptable
Reference Interval:
Normals are not applicable.
Note: Only IgM isohemagglutinin titers based on ABO screening results will be performed for this test. If both IgG and IgM titers are desired, order Isohemagglutinin Titer, IgG & IgM (2000280). Specimens are screened for antibodies; if positive, an antibody panel will be performed. Titers will be performed as indicated for specific blood groups. Additional charges will apply to antibody identification and titer testing.
CPT Code(s): 86900; if blood type is A add: 86941; if blood type is B, add: 86941; if blood type is O, add: 86941; 86941. If blood type is AB, no additional titers will be performed.
Cross References: Anti-A & B Titer (Isohemagglutinin Titer, IgM), Isohemagglutinin Titer, Anti A (Isohemagglutinin Titer, IgM), Isohemagglutinin Titer, Anti B (Isohemagglutinin Titer, IgM)