Your lab report comes back: a list of numbers, reference ranges, and abbreviations. Some are flagged. Most aren't. Before you spend the evening on WebMD, here's a practical guide to what the common panels mean, what flagged values usually indicate, and why context matters more than any single number.
TL;DR
- Reference ranges are statistical: ~5% of healthy people fall outside any given range without anything being wrong
- Trends matter more than single values; your personal baseline matters more than the population range
- Common panels covered here: CBC, CMP, lipid panel (incl. ApoB/Lp(a)), thyroid (TSH/Free T4), A1C, hs-CRP
- An "abnormal" flag is a data point, not a diagnosis; the clinical context drives interpretation
- In a concierge practice, results get reviewed by the physician personally (call or text), not as a portal notification
Common blood panels
Complete blood count (CBC)
White blood cells (WBC). Your immune system's counts. Elevated usually suggests infection or inflammation; low can suggest immune suppression, some medications, or viral illness. Normal range varies by lab but is roughly 4,000 to 11,000 cells per microliter.
Red blood cells (RBC) and hemoglobin. Oxygen-carrying capacity. Low hemoglobin is the most common marker for anemia, which has many causes (iron deficiency, chronic disease, blood loss, nutritional deficiency, bone marrow disorders). The pattern of the anemia (cell size, iron studies) tells you which cause.
Platelets. Clotting cells. Normal range is roughly 150,000 to 450,000. Abnormally low or high levels can indicate various conditions and warrant investigation.
Comprehensive metabolic panel (CMP)
Glucose. Blood sugar. Fasting glucose above 100 suggests prediabetes; above 125 suggests diabetes. A single elevated reading doesn't make a diagnosis; a pattern does.
BUN and creatinine. Kidney function markers. Elevated creatinine can indicate kidney disease or dehydration. eGFR (estimated glomerular filtration rate) is calculated from creatinine and gives a clearer picture of kidney function.
Liver enzymes (ALT, AST, alkaline phosphatase, bilirubin). Elevations can indicate hepatitis, fatty liver, medication effects, alcohol effects, or bile duct issues. Mild elevations are common and often benign; persistent or significant elevations warrant investigation.
Electrolytes. Sodium, potassium, chloride, bicarbonate. Imbalances can indicate dehydration, medication effects, kidney issues, or hormonal imbalance. Potassium particularly matters because both high and low levels can affect heart function.
Lipid panel
Total cholesterol. Historically the headline number, but not the most useful marker on its own.
LDL cholesterol. "Bad" cholesterol. Lower is generally better, with specific targets depending on your cardiovascular risk profile. For most people, below 100 mg/dL is reasonable; for high-risk patients, below 70.
HDL cholesterol. "Good" cholesterol. Higher is protective. Below 40 in men or 50 in women is associated with increased risk.
Triglycerides. Below 150 is ideal. Elevated triglycerides are usually driven by refined carbohydrates, alcohol, or metabolic dysfunction. (Five evidence-based lifestyle changes that lower the related cardiovascular risk markers.)
Advanced lipid markers (ApoB, Lp(a), particle size). Not on standard panels but increasingly used in patients with family history, borderline risk, or unclear pictures. These sometimes materially change the risk calculation and treatment decision. (What an executive-level physical actually includes.)
Thyroid panel
TSH. The primary screening test. High TSH suggests an underactive thyroid (hypothyroidism); low TSH suggests overactive (hyperthyroidism).
Free T4 and free T3. The actual thyroid hormones. Useful for confirming or further characterizing thyroid issues identified by TSH.
Hemoglobin A1C
An average of your blood sugar over the last three months. Below 5.7 is normal; 5.7 to 6.4 is prediabetes; 6.5 and above suggests diabetes. Not affected by what you ate yesterday, which is why it's useful.
Inflammatory markers (hs-CRP, ESR)
Markers of systemic inflammation. Elevated levels can indicate active infection, autoimmune conditions, or chronic low-grade inflammation. hs-CRP specifically is useful as part of cardiovascular risk assessment.
Why context matters more than any single number
A value outside the "reference range" doesn't automatically mean something is wrong. A few reasons:
Reference ranges are statistical. By design, about 2.5 percent of healthy people fall above the range and 2.5 percent fall below. Being slightly outside doesn't mean anything is wrong.
Trends matter more than points. A total cholesterol of 215 after years at 240 is an improvement worth noting. The same number after years at 180 warrants attention. Single values in isolation miss the pattern.
Your personal baseline matters. Some patients run naturally high or low on certain markers without clinical significance. Comparing to your own prior results is usually more useful than comparing to the population range.
Clinical context matters. A creatinine of 1.4 in a 55-year-old with hypertension means something different than the same value in a 25-year-old marathon runner. The symptoms, medications, and history all shape interpretation.
Labs rarely make diagnoses alone. They support or rule out hypotheses. The clinical picture drives the decisions.
What to do with an abnormal result
Don't panic. An abnormal result is a data point, not a diagnosis.
Ask your physician what it means in your specific context. A good physician will explain not just what the number is, but what it implies, what might be causing it, whether further testing is warranted, and what the next step is.
If the explanation feels insufficient or dismissive, it's reasonable to push for more. "This is probably nothing" may well be true, but it should come with enough context to make sense of.
How I review results in my practice
In my practice, I review every result with the patient personally, typically by phone or text rather than a portal message. I explain what was checked, what the findings mean, what's worth watching, and what (if anything) needs action. If something warrants specialist evaluation, I coordinate the referral directly.
That kind of review is where a lot of the clinical value of the annual physical actually happens. The tests are useful; the interpretation is where the decisions get made. (What it's actually like to have a doctor available 24/7 to walk you through results in real time.)
Frequently Asked Questions
How often should I get routine labs?
For healthy adults, an annual comprehensive panel as part of an annual physical is the standard. For patients with chronic conditions (diabetes, hypertension, thyroid disease, kidney disease), more frequent monitoring is appropriate, often every 3 to 6 months depending on the condition and how well-controlled it is. The right interval is decided with your physician based on your specific picture.
What if multiple values are flagged?
Multiple flagged values usually fit a pattern that points to one or two underlying causes (dehydration, an inflammatory process, a medication effect, an undiagnosed chronic condition). The pattern is more informative than any single value. A physician with time to look at the whole picture can usually identify the pattern; a physician with seven minutes often can't.
Do I need to fast for blood work?
Depends on the panel. Lipid panels and fasting glucose require an 8 to 12 hour fast for accurate results. CBC, CMP without glucose, thyroid panels, A1C, and most other tests don't require fasting. Always confirm with the lab order; the order itself usually specifies fasting requirements.
Do you order specialty labs beyond the standard panels?
Yes, when the clinical picture warrants. Common additions include ApoB and Lp(a) for cardiovascular risk refinement, advanced lipid fractionation, thyroid antibodies, vitamin D, B12, ferritin and iron studies, hormone panels, inflammatory markers, food sensitivity panels (with appropriate skepticism), and genetic risk markers in specific situations. The decision is patient-specific, not a standard menu.
Can I get a copy of my lab results to bring to another provider?
Yes. You're entitled to your own medical records under federal law. In this practice, results are sent to you directly (in addition to being reviewed with you) and you can also request a full copy of your records at any time, no questions asked.
How to evaluate any concierge practice for real lab-result review
A concierge practice that delivers actual value reviews results with the patient personally, not via portal notification. The criterion is panel size: below 300 patients makes that level of attention possible; above 600 doesn't. (Full criteria for evaluating any concierge practice.)
About the Author
Dr. Ben Soffer, DO is a board-certified physician practicing concierge primary care in Boca Raton, Florida. He caps his practice at 50 patients, which is what makes the kind of result-review described above (personal call, full context, integrated with the rest of your health) the actual operating model.
If you have lab results you want to understand better
A no-obligation conversation about your specific results.
- Call: 561-468-6981
- Email: info@drbensoffer.com
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