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Test Code M34 Gram Stain

Infectious

Additional Codes

ALAB: GRAMST

PowerChart: Gram Smear

MA Cerner: Gram Stain

Test Method

Fixed smears stained with crystal violet (fixed with iodine) and counter-stained with safranin; Gram Stain

Specimen Requirement

The gram stain slide is prepared in the laboratory from the specimen obtained for culture, if ordered. A smear for Gram Stain may be prepared at the patient bedside at the physician's discretion.

  • Spinal fluid and miscellaneous body fluids: perform a "Cytospin" preparation on the sample as soon as possible. Do not use an anticoagulant or refrigerate sample.
    Mercy DV and Medical Associates laboratories: a traditional direct smear Wright or Gram Stain is performed in lieu of “Cytospin”.

Performance

Monday through Sunday

Routine: Typically completed within 4 hours after the specimen arrives at the testing site.

Expedite: Typically completed within 2 hours after the specimen arrives at the testing site.

STAT: Typically completed within 90 minutes after the specimen arrives at the testing site.

Reference Values

The gram stain report will numerate the polys present and list and numerate the microbiological flora present with a presumptive identification when possible.

 

 

CPT Code Information

87205 Identification of Organism form Primary Source and Sensitivity Studies; smear, primary source with interpretation, Gram or Giemsa Stain for bacteria, fungi or cell types

Useful For

Detection of WBC and bacteria in clinical specimens.

LOINC Code Information

664-3 Microscopic Observation [Identifier] In Unspecified Specimen By Gram Stain

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