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HelpPorphyrins, Quantitative, Random, Urine
Additional Codes
LAB3891
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineOrdering Guidance
This random urine test should be ordered when the specimen will be received at Mayo Clinic Laboratories within 72 hours. If transportation may take longer than 72 hours, order both PQNU / Porphyrins, Quantitative, 24 Hour, Urine and ALAUR / Aminolevulinic Acid, Urine and follow collection guidelines.
Shipping Instructions
Ship specimen in amber bottle to protect from light.
Necessary Information
Include a list of medications the patient is currently taking.
Specimen Required
Patient Preparation: For at least 24 hours before specimen collection, patient must not consume any alcohol.
Supplies: Urine Container - Amber, 60 mL (T596)
Container/Tube: 60-mL Amber urine container
Specimen Volume: 20 to 50 mL
Collection Instructions:
1. Collect a random urine specimen.
2. No preservative3. Specimens should be protected from light and frozen immediately following collection.
Specimen Minimum Volume
15 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Frozen | 72 hours | LIGHT PROTECTED |
Special Instructions
Reference Values
Uroporphyrin, Octa: ≤3.1 mcmol/mol creatinine
Heptacarboxylporphyrins: ≤0.9 mcmol/mol creatinine
Hexacarboxylporphyrins: ≤0.3 mcmol/mol creatinine
Pentacarboxylporphyrins: ≤1.2 mcmol/mol creatinine
Coproporphyrin, Tetra: ≤25.0 mcmol/mol creatinine
Porphobilinogen: ≤0.2 mmol/mol creatinine
Aminolevulinic Acid: ≤ 2.3 mmol/mol creatinine
Day(s) Performed
Monday through Friday
CPT Code Information
84110-Porphobilinogen, quantitative
84120-Porphyrins, quantitation and fractionation
82135- ALA Delta Random Urine
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| PQNRU | Porphyrins, QN, Random, U | 93707-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 32332 | Uroporphyrin, Octa | 25166-0 |
| 32333 | Heptacarboxylporphyrins | 34314-5 |
| 32334 | Hexacarboxylporphyrins | 96795-0 |
| 32335 | Pentacarboxylporphyrins | 34352-5 |
| 32336 | Coproporphyrin, Tetra | 25167-8 |
| 32337 | Porphobilinogen | 2811-8 |
| 623039 | Aminolevulinic Acid, U | 39782-8 |
| 32338 | Interpretation | 49291-8 |
| 623040 | Reviewed By | 18771-6 |
Report Available
2 to 4 daysSpecimen Retention Time
1 weekForms
If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen.