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Urinalysis with Reflex to Microscopic
Test Code7909
CPT Codes
81003
Includes
A microscopic examination is performed, when appropriate, at an additional charge (CPT code(s): 81015).
Preferred Specimen
10 mL urine collected in a urinalysis transport tube (yellow-top, blue fill line, preservative tube)
Minimum Volume
Preserved urine: 3 mL
Unpreserved urine: 1 mL
Unpreserved urine: 1 mL
Other Acceptable Specimens
Urine collected in a yellow/red swirl-topped conical transport tube with preservative • 3 mL unpreserved urine collected in a leak-proof container
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
Unpreserved: Refrigerated (cold packs)
Unpreserved: Refrigerated (cold packs)
Specimen Stability
Preserved urine
Room temperature: 72 hours
Refrigerated: 72 hours
Frozen: Unacceptable
Unpreserved urine
Room temperature: Unacceptable
Refrigerated: 24 hours
Frozen: Unacceptable
Room temperature: 72 hours
Refrigerated: 72 hours
Frozen: Unacceptable
Unpreserved urine
Room temperature: Unacceptable
Refrigerated: 24 hours
Frozen: Unacceptable
Methodology
Reagent Impregnated Strips/Tablets/Microscopic Examination if urine macroscopic or dipstick indicates
Setup Schedule
Set up: Daily; Report available: Next day
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
Dipstick urinalysis measures chemical constituents of urine. Microscopic examination helps to detect the presence of cells, bacteria, yeast and other formed elements.
