Methylphenidate and Metabolite Quantitative, Serum or Plasma
Test Mnemonic
RITALN
CPT Codes
- 82542 - QTY (1)
- 80360 - QTY (1)
Aliases
- Ritalin
Includes
- Methylphenidate
- Ritalinic Acid
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Serum | No additive (Red) | Frozen, Critical | CRITICAL FROZEN. Collect specimen 1 - 6 hours post dose. Do NOT use separator tubes. Separate from cells ASAP or within 2 hours of collection and transfer into standard aliquot tube. Separate specimens must be submitted when multiple tests are ordered. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Plasma | EDTA (Lavender) | Frozen, Critical | CRITICAL FROZEN. Collect specimen 1 - 6 hours post dose. Do NOT use separator tubes. Separate from cells ASAP or within 2 hours of collection and transfer into standard aliquot tube. Separate specimens must be submitted when multiple tests are ordered. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.7 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Frozen | 5 months |
| Refrigerated | Unacceptable |
| Ambient | Unacceptable |
Days Performed
Varies
Turnaround Time
9 - 12 days
Methodology
| Name | Description |
|---|---|
| High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS) |
Special Info
CRITICAL FROZEN. Patient Prep: Collect specimen 1 - 6 hours post dose. Separate specimens must be submitted when multiple tests are ordered. Separator tubes are unacceptable. This test is New York DOH approved.
Clinical Info
Used for monitoring patient adherence.