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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Specific Gravity, Urine

Test Code(s): SG / HCSG

CPT Code(s): 81003

Test Description: Included In: Urinalysis with Microscopy; Urinalysis, without Microscopy

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 1 hour.
Routine: 4 hours.

Specimen Requirements

Specimen: Urine

Collection Instructions: First morning void preferred.  Refrigerate if transportation to lab is delayed.  Indicate whether specimen is midstream, indwelling catheter, single catheter or other method of collection. For midstream urine collection instructions refer to Health Facts for you - Male HF #4247, Female HF # 4236 located on UConnect.

Collection Container: Preferred: Sterile screw cap container

Collection Volume: Preferred: 10 mL
Pediatrics: 3 mL

Sample Analyzed: Urine aliquot

Volume Required: Preferred: 10 mL
Pediatrics: 3 mL

Specimen Transport: Transport specimen to the laboratory immediately. Transport with coolant pack if coming from outreach location.

Unacceptable Criteria: Samples held at room temperature for more than 2 hours or samples refrigerated for more than 24 hours are not acceptable.

Stability: Ambient: 2 hours
Refrigerated: 24 hours
Frozen: Not acceptable


Reference Interval:

Age 0 days and up:  1.005-1.035

Additional Information:

Conversion and Sensitivity Chart Link

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