Understanding Lab Orders, Results and Follow-Up

A lab report is easiest to understand with the provider who ordered it, because the numbers only mean something in the context of your health. A result outside the “normal” range is not automatically a problem, and one inside it is not a guarantee of good health. This guide explains the path from order to result, how to read the parts of a typical report, and what questions to bring to your follow-up.

From order to result: the usual path

1. Your provider decides which tests to order, based on your symptoms, history, screening needs or an ongoing condition.
2. The order is sent to a lab. At SimrikMed, your provider places the lab orders; blood is collected in-house if available, or at Quest, Labcorp, or another third-party lab of your choice.
3. You give the sample, following any preparation instructions. See preparing for lab testing.
4. The lab processes the sample and sends results to the ordering provider. Timing depends on the test and the lab.
5. You review the results with your provider, often in a follow-up visit, which may be by telehealth.

Reading a lab report

Lab reports vary in layout, but most include the same parts.

The result and its units

Each test shows a value and a unit, such as mg/dL or mmol/L. The same test can be reported in different units by different labs, so don’t compare numbers from two labs directly.

The reference range

A reference range is the span of values seen in most healthy people in a large group. It can differ between labs, and sometimes by age or sex. That is why the range printed on your report is the one that applies to your result.

Flags

Results outside the reference range are often marked “H” (high), “L” (low) or “abnormal”. A flag is a prompt to look more closely, not a diagnosis. MedlinePlus notes that a result just outside the range may not signal a problem, and a result within the range does not rule one out.

Positive, negative and inconclusive

Some tests report whether something was found rather than a number. Typically:

Report says	Usually means
Negative or normal	The substance or condition being tested for was not found
Positive or abnormal	It was found; more testing may be needed to confirm
Inconclusive or indeterminate	The result can’t be interpreted; a repeat test is often needed

False positives and false negatives are uncommon, but they happen. Your provider decides whether a result needs confirming.

What can affect a result

Results can shift for reasons that have nothing to do with illness. Examples include recent food or drink, medicines and supplements, strenuous exercise, the menstrual cycle, and preparation instructions that weren’t followed. If something like this applied on test day, tell your provider.

Questions to ask at your follow-up

• What does this result mean for me, given my history?
• Is anything outside the range important, or expected for me?
• Does anything need repeating, confirming or monitoring?
• How does this compare with my previous results?
• Is there anything I should change, and when should we test again?

MyHealthfinder encourages patients to ask for their results and to schedule any recommended follow-up tests before leaving a visit. If something isn’t clear, ask for it to be explained in plain language or written down.

Tracking trends over time

For ongoing conditions, the direction of change often matters more than any single value. Using the same lab when you can makes results easier to compare, because methods and ranges can differ between labs. Keep copies of your reports, or know how to find them in your patient portal.

If you haven’t heard back

If you were told to expect results and haven’t received them, contact the office. Don’t assume that no news means a normal result. Existing SimrikMed patients can use the Patient Portal for questions about results.

Next step

If you need lab work ordered and reviewed, start with SimrikMed’s lab testing service. For results tied to a long-term condition, see how chronic condition management visits work.