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Midwest · Carnitine Level Testing – Deficiency Test

Carnitine Level Testing – Deficiency Test in Illinois

Below is a plain-language overview of the carnitine level testing – deficiency test. Carnitine level testing measures the amount of carnitine in the body to help evaluate certain muscle disorders and metabolic concerns. Carnitine is needed for the body to use specific fats for energy.

Sample typeBlood and/or urine at a collection lab
ReferralIncluded — no referral from your own doctor needed

Lab requirements in Illinois

Here is what you need before ordering and completing the Carnitine Level Testing – Deficiency Test in IL. Review each item and confirm the details with the collection lab.

Physician's order
Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
Fasting
Fasting is required for this test — follow the collection lab's instructions.
Preparation
Preparation can vary, so follow the collection lab's instructions carefully. This may include fasting for a period before the sample is taken or avoiding certain foods or supplements.
Sample & visit
A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
Identification
Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
Turnaround
1-3 business days
Availability
Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.

Before you go

  • Order your test before visiting a lab, then use the requisition form in your account.
  • Print the requisition form, or fax it to the lab directly from your account.
  • No scheduling is needed — visit the collection lab during its normal business hours.
  • A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
  • Bring a government-issued photo ID in case the lab requests it.
  • Results are posted to your secure account within 1–3 business days.

Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.

What this test is

This test measures carnitine levels, typically in the blood, to check for a deficiency. Carnitine helps transport certain fats into cells so they can be used for energy. A deficiency can interfere with normal muscle function and fat metabolism.

What it measures

  • Total carnitine — reflects the overall amount of carnitine in the sample
  • Free carnitine — reflects the unbound form available for fat transport
  • Acylcarnitine — reflects carnitine bound to fatty acids
  • Acylcarnitine-to-free carnitine ratio — helps indicate how well carnitine is being used

What the test involves

A healthcare professional collects a blood sample, usually from a vein in the arm, using a standard blood draw. In some cases, a urine sample may also be collected depending on the lab's instructions.

Why it is often ordered

A clinician may order this test when a person has unexplained muscle weakness, fatigue, or other symptoms that could relate to how the body processes fats. It can also be used to monitor known metabolic conditions or the effects of certain treatments.

Preparation

Preparation can vary, so follow the collection lab's instructions carefully. This may include fasting for a period before the sample is taken or avoiding certain foods or supplements.

How results are reported

Results are reported as a numerical value for carnitine, often alongside a reference range. Reference ranges differ between laboratories, so results should always be interpreted in the context of the lab that performed the test.

Before you go

  • Whether fasting or other preparation is required before the sample collection
  • What type of sample will be collected, such as blood or urine
  • How and when results will be shared with you or your healthcare provider

Cities

Carnitine Level Testing – Deficiency Test in Illinois communities

Choose your city for local context and to order this test.

Chicago8,595,181Carnitine Level Testing – Deficiency TestRockford289,763Carnitine Level Testing – Deficiency TestRound Lake Beach287,012Carnitine Level Testing – Deficiency TestPeoria255,718Carnitine Level Testing – Deficiency TestAurora183,447Carnitine Level Testing – Deficiency TestSpringfield162,588Carnitine Level Testing – Deficiency TestChampaign153,278Carnitine Level Testing – Deficiency TestJoliet150,323Carnitine Level Testing – Deficiency TestNaperville149,013Carnitine Level Testing – Deficiency TestBloomington134,357Carnitine Level Testing – Deficiency TestElgin114,156Carnitine Level Testing – Deficiency TestWaukegan89,751Carnitine Level Testing – Deficiency TestDecatur88,002Carnitine Level Testing – Deficiency TestCicero84,905Carnitine Level Testing – Deficiency TestAlton83,705Carnitine Level Testing – Deficiency TestKankakee82,095Carnitine Level Testing – Deficiency TestEvanston78,454Carnitine Level Testing – Deficiency TestSchaumburg78,053Carnitine Level Testing – Deficiency TestArlington Heights77,283Carnitine Level Testing – Deficiency TestBolingbrook73,807Carnitine Level Testing – Deficiency TestPalatine67,754Carnitine Level Testing – Deficiency TestSkokie67,444Carnitine Level Testing – Deficiency TestDeKalb66,624Carnitine Level Testing – Deficiency TestCarbondale66,482Carnitine Level Testing – Deficiency TestDes Plaines60,413Carnitine Level Testing – Deficiency TestOrland Park58,622Carnitine Level Testing – Deficiency TestOak Lawn58,032Carnitine Level Testing – Deficiency TestBerwyn56,960Carnitine Level Testing – Deficiency TestMount Prospect56,510Carnitine Level Testing – Deficiency TestTinley Park55,988Carnitine Level Testing – Deficiency TestOak Park54,100Carnitine Level Testing – Deficiency TestWheaton53,762Carnitine Level Testing – Deficiency TestNormal53,446Carnitine Level Testing – Deficiency TestHoffman Estates52,153Carnitine Level Testing – Deficiency TestDowners Grove50,209Carnitine Level Testing – Deficiency TestGlenview48,150Carnitine Level Testing – Deficiency TestElmhurst45,661Carnitine Level Testing – Deficiency TestLombard44,311Carnitine Level Testing – Deficiency TestPlainfield44,296Carnitine Level Testing – Deficiency TestBuffalo Grove43,062Carnitine Level Testing – Deficiency TestMoline42,660Carnitine Level Testing – Deficiency TestBelleville42,463Carnitine Level Testing – Deficiency TestBartlett41,126Carnitine Level Testing – Deficiency TestRomeoville40,099Carnitine Level Testing – Deficiency TestCrystal Lake40,082Carnitine Level Testing – Deficiency TestCarol Stream39,895Carnitine Level Testing – Deficiency TestStreamwood39,736Carnitine Level Testing – Deficiency TestQuincy39,687Carnitine Level Testing – Deficiency TestPark Ridge39,562Carnitine Level Testing – Deficiency TestUrbana39,189Carnitine Level Testing – Deficiency TestWheeling39,104Carnitine Level Testing – Deficiency TestCarpentersville37,940Carnitine Level Testing – Deficiency TestHanover Park37,545Carnitine Level Testing – Deficiency TestRock Island37,519Carnitine Level Testing – Deficiency TestCalumet City36,065Carnitine Level Testing – Deficiency TestAddison35,999Carnitine Level Testing – Deficiency TestNorthbrook35,108Carnitine Level Testing – Deficiency TestOswego34,324Carnitine Level Testing – Deficiency TestWoodridge34,161Carnitine Level Testing – Deficiency TestGlendale Heights33,443Carnitine Level Testing – Deficiency Test