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Test Code ALA24 Delta Aminolevulinic Acid (ALA), 24 Hour, Urine

Performing Laboratory

Quest Diagnostics' Nichols Institute, Inc. - Chantilly



Reference Values


Adults <4.5 mg/24 h


Test Classification and CPT Coding

81050 - urine timed measurement

82135 - ALA


LOINC: 2200-4

Day(s) and Time(s) Performed

Tuesday, Thursday and Saturday


TAT  2 - 3 Days

Physician Office Specimen Requirements

Container/Tube:  24-hour urine collection container

Specimen: Entire container- No Preservative   Protect from Light

Transport Temperature: Send specimen refrigerated. Stable for 7 Days. If more than 7 days send frozen urine.


Note:  Starting and ending times of collection are required on request form for processing.


Alternate preservitive: 25 ml 6N HCL

Useful For

ALA is a precursor to uroporphyrin, coproporphyrin, and protoporphyrin. Concentrations of ALA are greatly increased in many patients with acute neurological forms of porphyrias and in some patients with chronic alcohol abuse.


Computer Interface Code

PDM # 5902031