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Printable Test Catalog - OU Medicine

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CPT: 82131<br />

[METHI<strong>OU</strong>] Urine Methionine<br />

SPECIMEN REQUIRED: Frozen urine (random)<br />

TUBE OR CONTAINER: Urine container<br />

SPECIMEN VOLUME: 10 mL<br />

MINIMUM VOLUME: 2 mL<br />

TEST AVAILABILITY: Daily<br />

TURNAR<strong>OU</strong>ND TIME: 3-6 days<br />

METHODOLOGY: High-pressure liquid chromatography (HPLC)<br />

CLINICAL USE: Evaluate amino acid metabolism<br />

CPT: 82131<br />

[METHM] Methylmalonic Acid<br />

SPECIMEN REQUIRED: Refrigerated serum or plasma<br />

TUBE OR CONTAINER: Red, Gold, or Light Green (heparin)<br />

SPECIAL HANDLING: Separate within 1 hour of collection<br />

SPECIMEN VOLUME: 2 mL<br />

MINIMUM VOLUME: 0.6 mL<br />

TEST AVAILABILITY: Daily<br />

TURNAR<strong>OU</strong>ND TIME: 4-7 days<br />

REFERENCE RANGE: 73-376 nmol/L<br />

METHODOLOGY: Gas chromatography/mass spectrometry (GC/MS)<br />

CLINICAL USE: Diagnose megaloblastic anemia<br />

CPT: 83921<br />

[METHS] METHSUXIMIDE (CELONTIN)<br />

SPECIMEN REQUIRED: Refrigerated serum or plasma<br />

TUBE OR CONTAINER: Red, Lavender (EDTA) or Dark green (heparin)<br />

SPECIAL HANDLING: Do NOT collect specimen in gel barrier tube<br />

SPECIMEN VOLUME: 1 mL<br />

MINIMUM VOLUME: 0.8 mL<br />

TEST INCLUDES: Methsuximide & Normethsuximide<br />

TEST AVAILABILITY: Daily<br />

TURNAR<strong>OU</strong>ND TIME: 2-6 days<br />

REFERENCE RANGE: Methsuximide: < 1 g/mL<br />

Normethsuximide: 10-40 g/mL<br />

Total: 10-40 g/mL<br />

OTHER NAMES: Celontin<br />

METHODOLOGY: Gas Chromatography (GC)<br />

CLINICAL USE: Therapeutic drug monitoring<br />

CPT: 83858<br />

[METHX] Methotrexate Level<br />

SPECIMEN REQUIRED: Refrigerated serum or plasma<br />

TUBE OR CONTAINER: Red, Gold or Light Green (heparin)<br />

SPECIAL HANDLING: Protect specimen from light and send to lab<br />

STAT<br />

SPECIMEN VOLUME: 1 mL

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