L-Homoarginine/Creatinine Ratio, Urine
A urine test measuring L-homoarginine relative to creatinine. This ratio helps account for urine concentration and assists in evaluating L-homoarginine excretion.
["This test measures urinary L-homoarginine relative to creatinine to help evaluate its excretion and metabolism."]
Key facts at a glance
- LOINC
- 79587-2
- Short code
- L-homoarginine/Creat Ur-sRto
- Synonyms
- L-homoarginine/Creat Ur-sRto
- Category
- kidney
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Ref low
- 1.5
- Ref high
- 9
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 83002
- Specimen volume
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What is this test?
This test measures the amount of L-homoarginine in urine compared with the amount of creatinine. Creatinine is used as a reference because its level in urine varies with urine concentration.
Why might I need this test?
The test may be used to evaluate L-homoarginine excretion and, in some cases, investigate possible changes in arginine metabolism. It is usually interpreted along with symptoms, kidney function tests, and other laboratory results.
How is the test performed?
A urine sample is collected in a laboratory-provided container. The laboratory measures L-homoarginine and creatinine and calculates their ratio using a validated analytical method. The collection period may be a single sample or a timed collection, depending on the order.
How do I prepare for the test?
Fasting is usually not required. Follow the collection instructions exactly, including the requested collection period and timing, and tell your clinician about medicines, supplements, supplements, or unusual dietary changes that could affect the result.
Reference range
Follicular: 1.5-9.0 mIU/mLN/A
For females: inform if menstrual cycle status. For certain tests, timing within menstrual cycle may matter.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
An abnormal ratio may reflect altered L-homoarginine metabolism or excretion, changes in creatinine production, hydration, or kidney function. An elevated result may prompt further evaluation for a metabolic condition, but it is not diagnostic by itself. Interpretation should be done by a clinician familiar with your symptoms and other test results.
Short name
Urinary L-homoarginine/creatinine ratio
Frequently asked questions
Why is the result reported as a ratio?
Do I need to fast before this test?
Can one abnormal result diagnose a condition?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy