Senior Health Blood Tests: What to Check After 65

What Is Senior Health Blood Testing?

Senior health blood testing focuses on the systems that change most with age: kidney function, blood counts, blood sugar, cholesterol, and sometimes vitamin and mineral levels. After 65, the goal shifts toward tracking chronic conditions, catching medication effects, and spotting problems while they are still manageable. Routine blood work is one of the simplest tools for that. This guide is educational information, not medical advice.

Because older adults often take several medications and may have more than one condition, results are interpreted together rather than in isolation. Trends over time can matter as much as a single reading.

Age changes how results are read. Kidney function, muscle mass, and hydration all shift with time, and a value that is normal for a 40-year-old may mean something different at 80. That is why reference ranges and clinical judgment matter more, not less, in older adults.

A written record of past results is especially useful at this stage, since gradual changes over several years often say more than one isolated reading.

Core Tests After 65

A senior wellness panel usually covers several groups at once:

Which markers matter most depends on existing conditions. Someone managing kidney disease will check kidney markers more often, while someone with heart risk focuses on lipids and glucose.

Medication monitoring is another common reason for blood work after 65. Drugs for blood pressure, cholesterol, diabetes, and thyroid function often need periodic lab checks to confirm they are working as intended and not causing side effects.

Kidney and Metabolic Function

Kidney function is estimated from creatinine, and the result is converted into an eGFR (estimated glomerular filtration rate). An eGFR below 60 for three months or more can indicate chronic kidney disease, and older adults are at higher risk, especially with diabetes or high blood pressure. The metabolic panel also reports electrolytes such as sodium and potassium, which can be affected by medications. Kidney function can decline quietly, so regular monitoring matters.

Hydration affects kidney markers, so a single low eGFR after a dehydrated day may not reflect steady function. Clinicians often repeat the test and compare results over time before drawing conclusions about kidney health.

Blood Counts and Anemia

A complete blood count measures red cells, white cells, and platelets. Anemia is common in older adults and can cause fatigue, weakness, and shortness of breath. It may stem from iron or vitamin deficiency, chronic disease, or blood loss, so the CBC is usually paired with ferritin, vitamin B12, or folate testing when anemia appears. A low white cell count or unusual platelet result can point to infection or another process that needs follow-up.

Vitamin B12 and folate are worth including when anemia appears, because deficiency becomes more common with age and can affect the nervous system as well as the blood. These markers help explain the cause behind an abnormal CBC.

Cholesterol and Heart Risk

Desirable total cholesterol is generally under 200 mg/dL, but treatment targets for older adults are individual. Age, blood pressure, diabetes, smoking history, and prior heart events all shape what matters. Some guidelines take a more relaxed approach to cholesterol goals in the very old, while others focus on overall cardiovascular risk. A lipid panel gives the raw numbers, and a clinician interprets them in context.

It also helps to bring a current medication list to any blood draw. Some drugs affect glucose, electrolytes, or kidney markers, and knowing what you take helps the person reading the results separate a true change from a medication effect.

How to Order and Where to Get Tested

Direct-access lab testing lets you order a senior wellness panel, a metabolic panel, a CBC, or individual markers online without a doctor's order. You pay at checkout and visit a local collection site for a blood draw. Fasting for 8 to 12 hours is usually recommended when glucose and lipids are included. Results arrive in a secure online account within a few business days, and you can share them with your clinician.

How Much Does It Cost

Out-of-pocket prices vary by lab, location, and panel size. A single CBC or metabolic panel often runs about $20 to $60, while a broader senior wellness panel commonly falls between about $100 and $300. Prices vary, so compare options before ordering. Medicare and insurance may cover testing when a clinician orders it and documents a medical reason.

Checking coverage ahead of time avoids surprise bills. Medicare Part B typically covers medically necessary tests ordered by a clinician, while routine screening without a documented medical reason may not be covered.