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Test Code MGMR Myasthenia Gravis Evaluation with Muscle-Specific Kinase Reflex, Serum (MG Eval w/ MuSK rfx, S)

Additional Test Codes

Panel includes: MGMRI, ARBI and reflex tests ACMFS, MUSK

Specimen Collection Type

preferred Red Top, Gold Top acceptable

Minimum Collection Volume

6.0 mLs

Additional Information / Notes

Collect 3 full red-top tubes (gold-tops are acceptable) and pour off 3.0mL (minimum 2mL) of serum into a MAYO transport tube. Store and ship refrigerated.

Reference Range

MGMRI: NA, MUSK: ≤ 0.02nmol/L, ACMFS: Negative, ARBI: ≤ 0.02nmol/L

Critical Value

NONE

Specimen Availability for Add-on Testing

no

Specimen Stability

28 days refrigerated or frozen, 72-hours ambient

Day(s) Performed

Monday – Sunday, reflex testing varies

Performing Lab - Department

MAYO

CPT Code

83519, 86255 and 83519 if appropriate

LOINC Code

MGMR = 53706-8 8338 = 97558-1 608981 = 69048-7

Performing Lab- Department

MAYO

Clinical Indications

Useful for diagnosing autoimmune myasthenia gravis in adults and children.

Test Alias

MUSK, Myasthenia Gravis Antibodies

Rejection Criteria

Gross hemolysis, lipemia, icterus

Reference Lab's Test Code

MGMR