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Urinalysis with Reflex to Microscopic
Test CodeCPT Codes
81003
Includes
A microscopic examination is performed, when appropriate, at an additional charge (CPT code(s): 81015).
Preferred Specimen
10 mL urine - Urinalysis transport tube (yellow-top, blue fill line, preservative tube)
Minimum Volume
Unpreserved (pediatric only): 1 mL
Other Acceptable Specimens
Instructions
Encourage midstream samples to minimize contamination and improve accuracy. Label the sample appropriately and store at room temperature until pick-up.
Note: The yellow-top, blue line tube cannot be used for collection and transport of specimens for urine culture.
**This test code does not include reflex to culture**
If reflex to culture is desired, please order "Urinalysis, Complete, with Reflex to Culture" (test code 3020).
If culture is being ordered separately, submit separate specimen (4 mL gray-top tube).
Transport Temperature
Preserved: Room temperature
Pediatric Unpreserved: Refrigerated (cold packs)
Specimen Stability
Room temperature: 72 hours
Refrigerated: 72 hours
Frozen: Unacceptable
Unpreserved urine
Refrigerated: 24 hours - Pediatric specimen
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Methodology
Reagent Impregnated Strips/Tablets/Microscopic Examination if urine macroscopic or dipstick indicates
Setup Schedule
Reference Range
Color | Yellow |
Appearance | Clear |
Specific Gravity | 1.001-1.035 |
pH | 5.0-8.0 |
Glucose | Negative |
Bilirubin | Negative |
Ketones | Negative |
Occult Blood | Negative |
Protein | Negative |
Nitrite | Negative |
Leukocyte Esterase | Negative |
WBC | ≤5 /HPF |
RBC | ≤2 /HPF |
Squamous Epithelial Cells | ≤5 /HPF |
Transitional Epithelial | ≤5 /HPF |
Renal Epithelial Cells | ≤3 /HPF |
Bacteria | None seen |
Calcium Oxalate Crystals | None or Few |
Triple Phosphate Crystals | None or Few |
Uric Acid Crystals | None or Few |
Amorphous Sediment | None or Few |
Crystals | None seen |
Hyaline Casts | None seen |
Granular Casts | None seen |
Casts | None seen |
Yeast | None seen |
Clinical Significance