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Test Code XRPROU Electrophoresis, Protein, Random, Urine

Additional Codes



Reporting Name

Electrophoresis, Protein, Random, U

Useful For

Identifying patients with a monoclonal M-spike

Profile Information

Test ID Reporting Name Available Separately Always Performed
RPEU Protein Electrophoresis, Random, U No Yes
PTCON Protein, Total, Random, U No Yes

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
RIFXU Immunofixation, Random, U No No

Testing Algorithm

If a discrete electrophoresis band is identified, the laboratory will evaluate the urine protein electrophoresis and, if necessary, perform immunofixation at an additional charge.

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Specimen Required

Collection Container/Tube: Clean, plastic urine collection container

Submission Container/Tube: Plastic, 5-mL tube (Supply T465) and plastic, 60-mL urine bottle

Specimen Volume: 50 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

3. Divide specimen between submission containers.

4. Label specimens appropriately (60-mL urine bottle for protein electrophoresis and 5-mL tube for protein, total).

Additional Information:

1. Random urine, no volume is required.

2. If a serum specimen on the same patient will also be submitted, order PEL / Electrophoresis, Protein, Serum under a separate order number.

Specimen Minimum Volume

25 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 14 days
  Frozen  5 days
  Ambient  72 hours

Reference Values


The following fractions, if present, will be reported as a percent of the total protein. 






No reference values apply to random urines.

Day(s) and Time(s) Performed

Total Protein: Monday through Sunday; Continuous

Protein Electrophoresis: Monday through Saturday; 12 p.m.

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

84156-Protein, total

84166-Electrophoresis, protein

86335-Immunofixation (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
REPU Electrophoresis, Protein, Random, U In Process


Result ID Test Result Name Result LOINC Value
33039 Albumin 13992-3
33040 Alpha 1-Globulin 13990-7
33041 Alpha 2-Globulin 13993-1
33042 Beta-Globulin 13994-9
33043 Gamma-Globulin 13995-6
33044 A/G Ratio 44293-9
33045 M spike 42483-8
33046 M spike 42483-8
33047 Impression 49299-1
PTCON Protein, Total, Random, U 2888-6

Method Name

PTCON: Dye Binding (Pyrogallol Red)

RPEU: Agarose Gel Electrophoresis

RIFXU: Immunofixation