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HelpTest Code 68 Mephenytoin (Mesantoin) and Normephenytoin (68)
Additional Codes
MedTox Laboratories Test Code: 68
Synonyms/Keywords
Mesantoin; Nirvanol
Specimen Requirements
| Specimen Type | Preferred Container/Tube | Acceptable Container/Tube | Specimen Volume | Specimen Minimum Volume (allows for 1 repeat) |
Pediatric Minimum Volume (no repeat) |
|---|---|---|---|---|---|
| Serum | Red Top Tube (RTT) | 2 mL | 0.5 mL | ||
| Plasma | Lithium-heparin Green Top Tube or Sodium-heparin Green Top Tube (GTT) | 2 mL | 0.5 mL |
Collection/Processing Instructions
Gel-barrier tubes are not recommended.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum or Plasma | Ambient | 3 days |
| Refrigerated | 2 weeks | |
| Frozen | 6 months |
Test Components
Mephenytoin (Mesantoin) and Normephenytoin
Reference Range Information
| Reference Ranges |
|---|
| Mephenytoin 1.0 - 5.0 ug/mL; Normephenytoin 15.0 - 35.0 ug/mL |
Performing Laboratory Name
Medtox Laboratories
Referral Laboratory Information
| Address | Telephone | Website Link | Marshfield Lab Account # |
|---|---|---|---|
|
402 West County Road D St. Paul, MN 55112 |
800-832-3244 (Main) 888-310-2264 (Team Emerald) |
www.medtox.com | 1080 |
Performing Information
| Performing Location | Day(s) Test Performed | Analytical Time | Methodology/Instrumentation |
|---|---|---|---|
| Medtox Laboratories | Thursday | 3 days | High Performance Liquid Chromatography with Ultraviolet Detection; (HPLC-UV) |
CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 80299 | 1 |
Outreach CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 80299 | 1 |