Frequently Asked Questions

Not necessarily — and definitely not before speaking with your provider. A flag simply means your result falls outside the reference range established by the laboratory, but context matters enormously. A few important things to understand:

• Reference ranges are designed to capture 95% of healthy individuals, meaning 5% of completely normal, healthy people will have a value slightly outside the range on any given test.
• Many mild abnormalities are clinically insignificant, especially in isolation.
• Your provider looks at trends over time, not single data points. A slightly elevated creatinine in someone with a long history of stable readings is different from a sudden spike.
• Some medications and even diet can temporarily push values outside normal ranges without any underlying disease.

The appropriate response to a flagged result is to note it, look it up to understand what it measures, and bring it up at your next appointment — or call your provider's office if you are concerned and want guidance sooner.

Because reference ranges are set by each individual laboratory based on their equipment, reagents, and the population they serve. A hemoglobin reference range at one hospital lab may be 12.0–16.0 g/dL while another lists 11.5–15.5 g/dL — both are valid for their respective labs.

Always use the reference range printed directly on your lab report when interpreting your specific results. The ranges on DecodeMyChart are general adult reference values intended for educational context, not for evaluating your individual results. Your lab's printed range is authoritative for your test.

An HbA1c of 5.8% falls in the prediabetes range (5.7% to 6.4%). This means your average blood sugar over the past 2–3 months has been above normal but has not yet reached the diabetic threshold of 6.5%.

Prediabetes is an important warning sign, but it is not a permanent condition. Research consistently shows that lifestyle changes — particularly modest weight loss (5 to 10% of body weight), increased physical activity, and reducing refined carbohydrates and added sugars — can normalize HbA1c and prevent or significantly delay progression to type 2 diabetes.

A TSH of 5.2 mIU/L is mildly elevated above the standard reference range of 0.4–4.0 mIU/L, which suggests the thyroid may be slightly underactive. However, whether this requires treatment depends on several factors your doctor will consider:

• Your symptoms — fatigue, weight gain, cold intolerance, constipation, and depression suggest hypothyroidism
• Your Free T4 level — if it is also low, treatment is more likely indicated
• Thyroid antibodies (TPO Ab) — positive antibodies suggest Hashimoto's thyroiditis and predict progression
• Your age and other health conditions
• Trend — a single mildly elevated TSH is often rechecked in 6–8 weeks before treatment is initiated

A TSH between 4.0 and 10 with normal Free T4 is sometimes called subclinical hypothyroidism. Guidelines vary on when to treat — some providers treat at TSH above 5, others wait until above 10, depending on symptoms and other factors.

eGFR (estimated glomerular filtration rate) measures how efficiently your kidneys are filtering waste from the blood. An eGFR below 60 mL/min on two separate tests at least 3 months apart indicates chronic kidney disease (CKD). The stages are:

• Stage 1 (eGFR ≥90): Normal or high — but with markers of kidney damage
• Stage 2 (eGFR 60–89): Mildly decreased
• Stage 3a (eGFR 45–59): Mild to moderate decrease
• Stage 3b (eGFR 30–44): Moderate to severe decrease
• Stage 4 (eGFR 15–29): Severely decreased — dialysis planning begins
• Stage 5 (eGFR <15): Kidney failure — dialysis or transplant needed

Many people live with Stage 3 CKD for years without needing dialysis, particularly when blood pressure, blood sugar, and proteinuria are well controlled. A single low eGFR is also sometimes due to dehydration or acute illness — your provider will confirm with repeat testing.

Medical abbreviations developed organically over decades as a practical shorthand — clinical documentation is extraordinarily time-consuming, and abbreviations allow providers to record complex information quickly. A single hospital note might document vital signs, a full physical exam, lab results, imaging findings, diagnoses, and a treatment plan across multiple organ systems. Without abbreviations, these notes would take hours to write and pages to read.

Most medical education is conducted in this shorthand, so abbreviations feel natural to clinicians even though they are opaque to patients. There is growing recognition in healthcare of the importance of patient-accessible documentation — the 21st Century Cures Act now requires that clinical notes be shared with patients, which has increased interest in making medical documentation more readable.

Many medical abbreviations are genuinely ambiguous and context-dependent. Some important examples:

• MS can mean Multiple Sclerosis, Morphine Sulfate, Mitral Stenosis, or Mental Status
• PE can mean Physical Exam or Pulmonary Embolism
• D/C can mean Discharge or Discontinue
• RA can mean Rheumatoid Arthritis or Room Air
• CA can mean Cancer, Carcinoma, or Calcium

Context almost always makes the meaning clear to a clinician reading the full note, but it can be confusing when reading in isolation. If an abbreviation in your records is unclear, ask your provider to clarify in plain language what was meant.

WNL stands for Within Normal Limits and means the finding being described was normal — nothing unusual was detected. When a clinician documents "abdomen WNL" or "cardiac exam WNL," it means that part of the physical exam appeared normal to the examining clinician at that time. It is a shorthand way of documenting a negative finding (nothing abnormal detected) without writing out a detailed description for each normal body system.

These are two very different types of medical orders:

NPO (Nothing by Mouth) is a temporary dietary order meaning the patient cannot eat, drink, or take anything orally. It is used before surgery, procedures, or when the gut needs to rest. It has nothing to do with end-of-life care.

DNR (Do Not Resuscitate) is an end-of-life care order specifying that if the patient's heart stops or they stop breathing, no CPR or resuscitation should be attempted. It is based on the patient's stated wishes and values about the kind of care they want. A DNR does not mean "do not treat" — patients with DNR orders still receive full medical treatment for their conditions, pain management, and comfort care. It only applies to the specific circumstance of cardiac or respiratory arrest.

An Explanation of Benefits (EOB) is not a bill — it is an informational document from your insurance company showing how a claim was processed. The "patient responsibility" amount on an EOB is what your insurance company has calculated you may owe, but you should wait for an actual bill from your healthcare provider before paying anything.

Sometimes the EOB and the provider's bill will differ. If they do, contact the provider's billing office and your insurance company to clarify before paying. Also check that the services listed on your EOB match what you actually received — billing errors are common.

Insurance claim denials are common and frequently overturned on appeal. Your rights and options include:

• Internal appeal: Request a formal review from your insurance company within their internal appeals process. Your EOB will include instructions and deadlines.
• External review: If your internal appeal is denied, you have the right to an independent external review by a third party not affiliated with your insurer.
• Your doctor's help: Ask your provider to submit a letter of medical necessity explaining why the treatment or medication was clinically required. Many denials are reversed with adequate clinical documentation.
• State insurance commissioner: If you believe your insurer is acting in bad faith, you can file a complaint with your state's insurance regulatory agency.

These three terms describe the different ways you share healthcare costs with your insurance company:

• Copay: A fixed dollar amount you pay for a specific service, regardless of the total cost. For example, a $30 copay for a primary care visit means you pay $30 every time, whether the visit costs $150 or $300.
• Deductible: The amount you must pay out of pocket each year before your insurance begins covering costs. If your deductible is $2,000, you pay the first $2,000 of covered medical expenses yourself before insurance kicks in. Many plans exempt preventive care and copays from the deductible.
• Coinsurance: After meeting your deductible, coinsurance is your percentage share of costs. With 20% coinsurance, if a covered service costs $1,000, you pay $200 and insurance pays $800. This continues until you reach your out-of-pocket maximum, after which insurance covers 100%.