Laboratory Services

Urinalysis with Reflex to Microscopic Exam

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Updated Test Information:

Test Description
Urinalysis with Reflex to Microscopic Exam


Test ID
General Information

Detect abnormalities of urine; diagnose and manage renal diseases, urinary tract infection, urinary tract neoplasms, systemic diseases, and inflammatory or neoplastic diseases adjacent to the urinary tract

Specimen Type


Specimen Requirements

Urine Cup

Minimum Sample Volume

5 ml of urine

Pediatric Min. Volume (if applicable)

2 ml of urine

Additional Processing Details

If analysis is unable to be performed within one hour of collection, store refrigerated up to 24 hours.


1 hour room temperature.
24 hours refrigerated.
48 hours in BD Vacutainer UA Preservative Tube

Unacceptable Specimen Conditions

Quantity not sufficient; improper labeling; specimen received in inappropriate preservative; specimen received in urine cup stored at room temperature greater than 1 hour old; specimen received in urine cup refrigerated more than 24 hours old; frozen specimens; specimens received in BD Vacutainer UA Preservative Tube more than 48 hours old


Metabolites of Pyridium® may interfere with the dipstick reactions by producing color interference. High vitamin C intake may cause an underestimate of glucose, blood, bilirubin, and a false-negative nitrite test. A low ph can also result in a false negative for protein and WBC's. A false negative for WBC's also can occur with elevated specific gravity, glucose, and/or protein levels. An increased specific gravity may cause a false negative for blood and/or nitrites. False positives can occure for protein when hemoglobin is present and/or an elevated ph level.



Estimated TAT

0-2 days

Testing Schedule

Monday-Saturday, & STAT

CPT Code(s)


Reference Range
Specific Gravity                               1.005 - 1.030
pH 5.0 - 7.5
Urine Color Yellow
Appearance Clear
WBC Esterase Negative
Protein Negative
Glucose Normal
Ketones Negative
Blood Negative
Bilirubin Negative
Urobilinogen Normal
Nitrite Negative
Microscopic Exam:
WBC 0 - 5/hpf
RBC 0 - 2/hpf
Squamous Epithelial 0 - 10/hpf
Casts None Seen
Mucus None seen
Crystals with Identification None Seen
Bacteria None seen
Yeast None seen
WBC and RBC clumps None seen
Non-squamous Epithelial None seen
Renal Epithelial None seen
Transitional Epithelial None seen
Trichomonas Not Present
Reflex Conditions

Reflex to microscopic examination when any of the following are positive; leukocyte esterase, blood, protein, or nitrite.

Performing Lab

Incyte Diagnostics

LOINC Code(s)


Additional Information

Includes; Specific Gravity
Urine Color
WBC Esterase
Reflex Microscopic includes; WBC, RBC, epithelial cells, casts, crystals, mucus, bacteria, yeast, trichomonas, any other abnormality