Territories · Online Liver Function Test (LFT Test)
Online Liver Function Test (LFT Test) in Puerto Rico
Online Liver Function Test (LFT Test) can be ordered without a referral from your own doctor, and this guide covers what to expect. A liver function test checks how well your liver is working by measuring several substances in your blood.
Lab requirements in Puerto Rico
Here is what you need before ordering and completing the Online Liver Function Test (LFT Test) in PR. 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 instructions vary by laboratory, so follow the specific instructions provided by the collection lab. Some tests may require fasting, while others do not.
- 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
A liver function test is a group of blood tests that assess the health and function of your liver. It measures levels of enzymes, proteins, and other substances that can indicate liver damage or disease.
What it measures
- Albumin — a protein made by the liver that reflects liver function and nutritional status
- Total Protein — measures the total amount of proteins in the blood, including albumin and globulins
- ALP (Alkaline Phosphatase) — an enzyme found in the liver, bile ducts, and bone
- ALT (Alanine Aminotransferase) — an enzyme primarily found in the liver that can indicate liver damage
- AST (Aspartate Aminotransferase) — an enzyme found in the liver and other tissues that can indicate liver damage
- Bilirubin — a yellow pigment produced from the breakdown of red blood cells that is processed by the liver
What the test involves
The test requires a standard blood draw from a vein in your arm. The sample is then sent to a laboratory for analysis.
Why it is often ordered
A clinician may order a liver function test to screen for liver problems, monitor a known liver condition, or check for side effects of certain medications. It can also help evaluate symptoms like jaundice, fatigue, or abdominal pain.
Preparation
Preparation instructions vary by laboratory, so follow the specific instructions provided by the collection lab. Some tests may require fasting, while others do not.
How results are reported
Results are typically reported as numerical values for each marker, often with a reference range for comparison. Reference ranges can vary between laboratories, so your results should be interpreted by a healthcare professional.
Before you go
- Whether fasting is required before the test
- Any medications or supplements you are taking that might affect results
- The expected turnaround time for results
Cities
Online Liver Function Test (LFT Test) in Puerto Rico communities
Choose your city for local context and to order this test.