Ordering Recommendation

Use to determine cause of acidosis. May aid in diagnosis and monitoring of kidney stones.

Mnemonic

AMMO U

Methodology

Quantitative Enzymatic

Performed

Varies

Reported

3-5 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation
Collect

24-hour urine. Refrigerate during collection or add 5 mL of diazolidinyl urea (Germall) as preservative at start of collection.

Specimen Preparation

From a well-mixed 24-hour collection, transfer 4 mL urine to an ARUP Standard Transport Tube. (Min: 1 mL). Collection duration and urine volume must be provided for testing.Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.

Storage/Transport Temperature

Refrigerated. Also acceptable: Frozen.

Unacceptable Conditions
Remarks

Specimens with pH >8 may indicate bacterial contamination and testing will be cancelled. Do not attempt to adjust pH as it will adversely affect results.

Stability

Ambient: 72 hours; Refrigerated: 2 weeks; Frozen: 2 weeks

Reference Interval

By Report

Interpretive Data



Compliance Category

Not Applicable

Note

Reference values have not been established for patients less than 18 years and greater than 77 years of age. The presence of sulfasalazine, sulfapyridine, or temozolomide may lead to false results.

Hotline History

N/A

CPT Codes

82140

Components

Component Test Code* Component Chart Name LOINC
3004263 Ammonium, 24 Hour Urine 25308-8
3004264 Ammonium Collection Duration 13362-9
3004265 Ammonium Urine Volume 3167-4
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Ammonia
Ammonium, 24-Hour Urine

Mayo Clinic Laboratories