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Myoglobin, Random, Urine

Additional Codes

Primary ID

Epic Code

Mayo Test ID




Reporting Name

Myoglobin, Random, U

Useful For

Confirming the presence of a myopathy associated with any 1 of the following disorders

-Hereditary myoglobinuria

-Phosphorylase deficiency

-Sporadic myoglobinuria

-Exertional myoglobinuria in untrained individuals

-Crush syndrome

-Myocardial infarction

-Myoglobinuria of progressive muscle disease

-Heat injury


May suggest a myopathic cause for acute renal failure

Method Name

Latex Particle-Enhanced Immunoturbidometric Assay

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type


Specimen Required

Supplies: Urine Myoglobin Transport Tube (T691)

Container/Tube: Plastic, 10-mL urine myoglobin transport tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a preservative-free, random urine specimen.

2. If specimen is at ambient temperature, aliquot the urine to a urine myoglobin transport tube (T691) within 1 hour of collection. Refrigerate specimen.

3. If specimen is refrigerate, aliquot the urine to a urine myoglobin transport tube (T691) within 2 hours of collection.

Additional Information: Urinary myoglobin is highly unstable unless alkalinized with sodium carbonate preservative. Even with alkalinization, myoglobin deterioration is variable and specimen dependent (approximate averages of 10% at 1 day, 20% at 3 days, and 30% at 7 days).

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated 7 days MYOGLOBIN TRANSPORT TUBE

Reject Due To

Use of any transport tube other than urine myoglobin transport tube Reject

Reference Values

≤65 mcg/L for 18-83 years of age

Reference values have not been established for patients<18 or >83 years of age.

Day(s) and Time(s) Performed

Monday through Sunday; Continuously

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
MYGLU Myoglobin, Random, U 2641-9


Result ID Test Result Name Result LOINC Value
MYGLU Myoglobin, Random, U 2641-9

Analytic Time

1 day

Specimen Retention Time

7 days

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

NY State Approved