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In the near future Walk-In Lab will be providing Quest COVID-19 Antibody testing.  Learn more.

Renal Function

The renal system, also known as the urinary system, includes the kidneys, the ureters, the bladder, and the urethra. The system works together to help rid the body of waste, as well as to stabilize blood pressure, blood pH and blood volume, and electrolyte levels. Kidneys: All blood passes through the kidneys. The kidneys filter and process the blood, removing what is unnecessary and reabsorbing vital nutrients back into the body. The waste is processed into urine. Ureters: The ureters are long and thin fibrous tubes that connect the kidneys to the bladder. One ureter is connected to each kidney. Urine passes from the kidneys into the ureters that lead the urine down to the bladder. Bladder: The bladder is used as a storage space for waste that needs to be excreted from the body. On average, the bladder can hold 400ml to 600ml at a time of the one to two liters of urine that are produced each day. Urethra: During urination, waste passes from the bladder to the urethra, which then passes the urine outside of the body. The length of the urethra is the only difference between the male urinary system and the female urinary system.

Choose One Lab: LABCORP (LC) or QUEST (QD) or ALL

Walk-In Lab is contracted with LabCorp (LC) and Quest Diagnostics (QD) for routine lab testing. Please choose LC or QD to complete your order. If you prefer to receive a kit by mail for specimen collection, please see our Home Test Kits. LC and QD tests must be ordered separately.

LabCorp: Online lab testing is prohibited in MA, MD, NY, NJ and RI.

Quest Diagnostics: Online lab testing is prohibited in NY, NJ and RI.

  • Creatinine Clearance 24-Hour Urine and Blood Test Wi...

    A Creatinine Clearance 24-Hour Urine and Blood Test With Body Surface Area Normalization includes Serum creatinine; urine creatinine.
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  • Parathyroid Hormone (PTH) Intact Blood Test

    A PTH Intact Blood Test diagnoses parathyroid disease and other diseases of calcium homeostasis; monitoring patients undergoing renal dialysis.
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  • Comprehensive Metabolic Panel (CMP-14) with eGFR Blo...

    The CMP-14 is a broad screening test used to evaluate kidney and liver function, electrolytes and glucose.
    More Info
  • Creatinine Serum Test

    A Creatinine Serum Test is a renal function test, providing a rough approximation of glomerular filtration.
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  • Creatinine Urine Test, 24-Hour

    A Creatinine Urine Test is used to determine glomerular filtration rate, which helps to measure how well the kidney functions.
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  • Creatinine Clearance 24-Hour Urine and Blood Test

    A Creatinine Clearance 24-Hour Urine and Blood Test is used to evaluate the rate and efficiency of kidney filtration.
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  • Cystatin C Blood Test

    A Cystatin C Blood Test is used to screen for and monitor kidney dysfunction in those with known or suspected kidney disease.
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  • Microalbumin/Creatinine Ratio Urine Test, Random

    The Microalbumin/Creatinine Ratio Urine Test, Random is a urine test that may help to determine if kidneys are functioning normally. This test is an early indicator of kidney failure.
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  • Potassium Urine Test, 24-Hour

    A 24-hour Potassium Urine Test is used to detect abnormal concentrations of potassium, including high potassium (hyperkalemia) and low potassium (hypokalemia).
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  • Potassium Blood Test, RBC

    The Potassium Blood Test, RBC provides a measurement of intracellular Potassium levels which can indicate deficiency sooner than an ordinary blood test.
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  • Protein Total Urine Test, Quantitative, 24-Hour

    Used to evaluate and monitor kidney function, and to detect kidney damage.
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  • Renal Function Blood Test Panel

    Renal Function Blood Test Panel evaluates kidney function, diagnose kidney-related disorders, screen for or monitor those with kidney disease.
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  • Sodium Urine Test, 24-Hour

    A 24-hour Sodium Urine Test is used in determining the cause of a sodium imbalance and for patients with kidney conditions to determine the cause of damage.
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  • Vitamin D 1,25 Dihydroxy (Calcitriol) Blood Test

    A Vitamin D 1,25 Dihydroxy Blood Test is ordered when investigating a problem related to bone metabolism or parathyroid function, possible Vitamin D deficiency or malabsorption.
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  • Osmolality Urine Test

    An Osmolality Urine Test is useful in monitoring the level of water in the body and to check the ability to produce urine.
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  • Creatinine Urine Test, Random

    A Creatinine Urine Test, Random is useful in monitoring kidney function. 
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  • Urea Nitrogen (BUN) Serum Test

    A Urea Nitrogen (BUN) Serum Test is used to measure the amount of urea in the blood.
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  • Basic Metabolic Panel (BMP8) Blood Test

    A Basic Metabolic Panel (BMP8) Blood Test is a regularly ordered group of 8 tests that gives important information about the current status of your health.
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  • Albumin Serum Test

    Albumin blood test evaluates nutritional status, blood oncotic pressure, evaluation of renal disease with proteinuria, and other chronic diseases.
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  • Sodium Urine Test, Random

    A Sodium Urine Test Random Sodium Urine Test is a work-up volume depletion, acute renal failure, acute oliguria, and differential diagnosis of hyponatremia.
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  • Urea Nitrogen Urine Test, 24-Hour

    A Urea Nitrogen Urine Testis a Renal function test; coarse nitrogen-wasting test on patients on hyperalimentation; indicate nitrogen balance in hyperalimentation; rule out tap of urinary bladder in amniocentesis, paracentesis.
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