A routine health evaluation may include laboratory testing to assess blood cells, blood sugar, cholesterol, kidney and liver function, electrolytes, and other aspects of health. However, there is no single laboratory panel that every adult needs at every checkup.

The most appropriate testing depends on your age, medical history, medications, symptoms, previous laboratory results, family history, lifestyle, and individual risk factors.

Common tests may include a complete blood count (CBC), comprehensive metabolic panel (CMP), lipid panel, and blood glucose or hemoglobin A1C. Additional testing may be appropriate depending on the individual patient. CBCs evaluate several types of blood cells, CMPs provide information about metabolic and organ-related markers, and lipid testing measures cholesterol and triglycerides.

If you are new to laboratory testing, you may also want to read our Patient’s Guide to Understanding Blood Work and Laboratory Testing.

What Is Considered Routine Laboratory Testing?

Routine laboratory testing generally refers to widely available blood or urine tests used to evaluate overall health, screen for selected health conditions, investigate risk factors, or monitor known medical problems.

These tests are different from highly specialized laboratory panels designed to investigate a particular clinical question.

A routine evaluation might examine areas such as:

• Blood-cell health

• Blood sugar and metabolic health

• Cholesterol and cardiovascular risk

• Kidney function

• Liver function

• Electrolytes

• Thyroid function when appropriate

• Selected nutritional markers when clinically indicated

• Certain infectious-disease screenings based on age and risk

• Urine findings when there is a reason to perform urinalysis

The important point is that routine does not necessarily mean universal. A test may be commonly ordered without being necessary for every individual every year.

You can explore additional articles and patient guides in our Routine Laboratory Testing Resource Center.

Complete Blood Count (CBC)

A complete blood count, or CBC, is one of the most commonly used blood tests.

A CBC measures several components of your blood, including:

• Red blood cells

• White blood cells

• Hemoglobin

• Hematocrit

• Platelets

• Red blood cell indices

Depending on the order, it may also include a white-blood-cell differential.

A CBC can provide information that helps your physician evaluate concerns involving anemia, infection, blood-cell abnormalities, and other medical conditions.

For example, a low hemoglobin level could prompt further evaluation for anemia. An abnormal white blood cell count may need to be interpreted in the context of infection, medications, inflammation, immune conditions, or other causes.

An abnormal CBC result does not automatically establish a diagnosis. It tells your physician that the result may deserve further interpretation or evaluation.

Comprehensive Metabolic Panel (CMP)

A comprehensive metabolic panel, or CMP, is another common laboratory test.

A standard CMP measures 14 substances and provides information related to your metabolism, electrolytes, kidney function, liver-related markers, proteins, and blood glucose.

A CMP commonly includes measurements such as:

• Glucose

• Sodium

• Potassium

• Chloride

• Carbon dioxide/bicarbonate

• Calcium

• Blood urea nitrogen (BUN)

• Creatinine

• Albumin

• Total protein

• Bilirubin

• Alkaline phosphatase

• Alanine aminotransferase (ALT)

• Aspartate aminotransferase (AST)

Together, these results can give your physician useful information about several different organ systems.

For example, creatinine and BUN can contribute to assessment of kidney function, while several enzymes and proteins included in the CMP provide information relevant to liver health.

What About a Basic Metabolic Panel?

A basic metabolic panel, or BMP, contains fewer tests than a CMP.

The BMP includes eight of the measurements found in a CMP but does not include the additional liver enzymes and proteins contained in the comprehensive panel.

Which panel is more appropriate depends on what your physician is trying to evaluate.

Lipid Panel

A lipid panel evaluates fats in your blood that are relevant to cardiovascular health.

A typical lipid panel includes:

• Total cholesterol

• LDL cholesterol

• HDL cholesterol

• Triglycerides

These results are not interpreted in isolation. Cardiovascular risk also depends on factors such as age, blood pressure, smoking history, diabetes, medical conditions, family history, and other individual risk factors.

A cholesterol test measures cholesterol and triglycerides circulating in the blood and is commonly used as part of cardiovascular risk assessment.

Someone with a mildly abnormal cholesterol result but few additional cardiovascular risks may have a very different clinical situation from someone with the same result plus diabetes, hypertension, tobacco use, or a strong family history of premature cardiovascular disease.

That is why the goal should be to evaluate the complete risk picture, rather than simply trying to make every number on a laboratory report fall within a reference range.

Blood Glucose and Hemoglobin A1C

Blood sugar testing can help evaluate your metabolic health and risk of prediabetes or diabetes.

Two commonly used tests include:

Fasting or Random Blood Glucose

Glucose is commonly included in a CMP or BMP.

The result can provide a snapshot of your blood sugar at the time the sample was collected.

Hemoglobin A1C

Hemoglobin A1C provides information about average blood glucose exposure over a longer period rather than measuring only the blood sugar present at the moment of the blood draw.

Whether diabetes screening is appropriate depends partly on age and individual risk. For example, the U.S. Preventive Services Task Force recommends screening adults ages 35–70 who have overweight or obesity for prediabetes and type 2 diabetes.

Patients with other risk factors may require individualized testing outside a simple age-based schedule.

Is Thyroid Testing Part of Routine Blood Work?

Sometimes, but not automatically.

Thyroid-stimulating hormone (TSH) is generally the first laboratory test used when thyroid dysfunction is being evaluated.

A physician may consider thyroid testing when there are symptoms or clinical concerns involving issues such as:

• Unexplained fatigue

• Changes in weight

• Cold or heat intolerance

• Changes in heart rate

• Menstrual changes

• Changes in bowel habits

• Hair or skin changes

• Previous thyroid disease

• Certain medications

• Family or personal medical history

For completely asymptomatic, nonpregnant adults, the U.S. Preventive Services Task Force has concluded that current evidence is insufficient to determine the balance of benefits and harms of universal thyroid screening.

That is one reason thyroid testing should be selected based on the clinical context rather than automatically assuming that every laboratory panel must contain TSH.

Are Vitamin Levels Included in Routine Blood Work?

Usually not automatically.

Tests such as:

• Vitamin D

• Vitamin B12

• Folate

• Iron

• Ferritin

• Magnesium

• Other vitamin or mineral measurements

may be helpful in certain situations, but they are not necessarily required in every healthy adult.

Your physician may consider nutritional testing when there are symptoms, dietary restrictions, previous deficiencies, gastrointestinal conditions, medication use, anemia, malabsorption concerns, or other reasons to suspect a deficiency.

Ordering every available nutritional marker simply because it exists can increase cost and may produce findings that do not meaningfully change medical care.

Are Hormone Tests Included in Routine Blood Work?

Usually not.

Hormone testing is generally performed because there is a specific clinical reason to evaluate a particular hormone system.

Examples might include evaluation of:

• Testosterone

• Estradiol

• Progesterone

• FSH

• LH

• Prolactin

• Cortisol

• DHEA-S

• Other endocrine markers

The appropriate test may depend on symptoms, age, biological sex, medications, menstrual status, time of day, or other factors.

Hormone levels can also fluctuate considerably, so interpreting one isolated result without the appropriate clinical context can be misleading.

Are Urine Tests Part of a Routine Health Evaluation?

A urinalysis may be ordered in some health evaluations, but it is not automatically necessary for every healthy adult.

Urine testing may be particularly useful when evaluating concerns involving:

• Urinary symptoms

• Kidney disease

• Diabetes

• Certain medications

• Blood in the urine

• Protein in the urine

• Pregnancy-related evaluation

• Selected occupational or preoperative requirements

The reason for testing should determine whether a urinalysis is useful.

Can Infectious-Disease Screening Be Part of Routine Laboratory Testing?

Yes, depending on age, prior testing, pregnancy status, exposures, and individual risk.

Preventive screening may include testing for selected infections even when a person does not have symptoms.

For example, current USPSTF recommendations include hepatitis C screening for adults ages 18–79 and HIV screening for adolescents and adults ages 15–65, with testing outside those ages for certain people at increased risk.

Other testing for sexually transmitted infections or infectious diseases should be individualized according to sexual history, exposure history, pregnancy, symptoms, and current screening recommendations.

What Additional Tests Might Be Ordered?

Once your physician reviews your history, symptoms, medications, physical findings, and previous results, additional laboratory testing may sometimes be appropriate.

Examples can include:

• Iron and ferritin

• Vitamin B12 or folate

• Vitamin D

• Thyroid studies

• Insulin

• Inflammatory markers

• Hormone testing

• Urine studies

• Kidney-specific testing

• Liver testing

• Selected autoimmune markers

• Infectious-disease testing

• Additional cardiovascular markers

These tests should generally answer a specific clinical question rather than simply expanding a panel for the sake of obtaining more data.

When a particular health concern requires testing beyond standard blood work, specialty laboratory testing may sometimes be considered. Specialty testing should complement—not automatically replace—appropriate conventional evaluation.

Does Everyone Need the Same Routine Laboratory Panel?

No.

This is one of the most important points to understand about routine laboratory testing.

Imagine three patients:

A healthy 25-year-old with no medications, no symptoms, and no significant family history may need a very different evaluation from a 48-year-old with obesity, hypertension, and a family history of diabetes.

Likewise, a 68-year-old taking several medications may require monitoring that would provide little value to either younger patient.

Laboratory testing should therefore take into account:

• Age

• Biological sex when clinically relevant

• Personal medical history

• Family history

• Current medications

• Supplements

• Previous laboratory results

• Symptoms

• Blood pressure

• Weight and metabolic risk

• Diet

• Alcohol and tobacco use

• Pregnancy status

• Cardiovascular risk

• Individual preventive-screening needs

Personalized testing can help avoid both undertesting, where an important health risk is overlooked, and over-testing, where unnecessary testing creates additional expense, anxiety, false-positive findings, or follow-up procedures that may not ultimately improve health.

Do I Need Routine Blood Work Every Year?

Not necessarily.

Some patients benefit from annual or more frequent laboratory testing because they have chronic medical conditions, take medications that require monitoring, have previously abnormal results, or have meaningful health risks.

Other healthy adults may not need every laboratory test repeated every year.

The appropriate interval depends on the test and the individual.

For example, screening frequency for blood sugar, cholesterol, medication safety, kidney function, or other markers may differ substantially between patients.

Rather than following an automatic yearly checklist, your physician should decide what needs to be tested based on what information is likely to influence your healthcare decisions.

Should I Fast Before Routine Laboratory Testing?

It depends on which tests have been ordered.

Some laboratory tests may require fasting, while others do not.

Even when fasting is not strictly required, your physician may occasionally prefer testing under similar conditions from one visit to another when monitoring trends.

Do not assume that you should fast simply because blood is being drawn.

Follow the instructions provided by your physician or laboratory, and do not stop prescription medications unless you have specifically been instructed to do so.

What Happens If One of My Routine Laboratory Tests Is Abnormal?

An abnormal result does not automatically mean that you have a disease.

Laboratory reference ranges are statistical tools, and results may be influenced by hydration, food intake, exercise, medications, supplements, acute illness, time of day, laboratory methodology, biological variation, and other factors.

Even healthy individuals may occasionally have a result that falls slightly outside a laboratory's reference interval.

Your physician may respond by:

• Comparing the result with previous measurements

• Reviewing your symptoms and medical history

• Repeating the test

• Ordering a more specific laboratory test

• Reviewing medications or supplements

• Discussing lifestyle changes

• Performing additional evaluation

• Monitoring the result over time

• Referring you to another healthcare professional when appropriate

Laboratory results should therefore be interpreted as part of the larger clinical picture rather than as isolated numbers. MedlinePlus similarly notes that abnormal general laboratory findings provide clues that healthcare professionals interpret alongside other health information.

Can Routine Laboratory Testing Detect Disease Before Symptoms Develop?

Sometimes.

Laboratory testing may identify risk factors or abnormalities before a person recognizes symptoms.

Examples can include elevated blood sugar, abnormal cholesterol, anemia, kidney-function changes, or certain infectious diseases.

However, routine blood work cannot screen for every medical condition, and normal laboratory results do not guarantee that a person is completely healthy.

Preventive healthcare also involves medical history, blood pressure, physical examination when appropriate, cancer screening, vaccinations, lifestyle assessment, family history, and other age- and risk-appropriate preventive services.

For a broader approach to proactive healthcare, visit our Preventive Care and Health Optimization page.

Frequently Asked Questions

What are the most common tests included in routine blood work?

Common tests may include a CBC, CMP or BMP, lipid panel, and glucose or hemoglobin A1C. The appropriate combination depends on the individual patient.

Does routine blood work always include a thyroid test?

No. TSH may be ordered when thyroid disease is suspected, previously diagnosed, or considered relevant based on symptoms and risk factors. Universal thyroid screening is not automatically necessary for every asymptomatic adult.

Are vitamin D and vitamin B12 routinely tested?

Not necessarily. These tests may be useful when symptoms, diet, medications, medical history, or other findings suggest that a deficiency is possible.

Are hormone tests part of an annual physical?

Usually not unless there is a clinical reason to evaluate a particular hormone.

Does more laboratory testing provide better preventive care?

Not necessarily. More testing can sometimes uncover useful information, but unnecessary testing can also lead to incidental abnormalities, additional expense, and follow-up testing without clear benefit.

The goal is to order the right tests for the right patient, not simply the largest available panel.

Can normal blood work prove that I am healthy?

No. Laboratory testing is only one component of a health evaluation. Normal blood work cannot exclude every medical condition and should be considered alongside your symptoms, medical history, physical findings, age, risk factors, and appropriate preventive screenings.

The Bottom Line

A routine health evaluation commonly includes laboratory testing related to blood cells, metabolic health, kidney and liver function, blood sugar, and cholesterol, but there is no universal blood-test package that every person should receive every year.

Your physician may add or remove tests based on your age, health history, symptoms, medications, family history, previous results, and individual risk factors.

The most useful laboratory evaluation is therefore not necessarily the most comprehensive one. It is the one designed to answer the health questions that matter for you.

Explore more physician-written information about blood work, preparation, test interpretation, and preventive testing in the Routine Laboratory Testing Resource Center.

Evidence & Medical References

This article was written for patient education using established medical references and preventive-screening recommendations.

Helpful references include:

• MedlinePlus – Complete Blood Count (CBC) — overview of the components and uses of a CBC.

• MedlinePlus – Comprehensive Metabolic Panel (CMP) — explanation of the substances measured in a CMP.

• MedlinePlus – Cholesterol Levels — information about cholesterol and lipid testing.

• U.S. Preventive Services Task Force – Prediabetes and Type 2 Diabetes Screening — preventive screening recommendations for selected adults.

• U.S. Preventive Services Task Force – Thyroid Dysfunction Screening — evidence review and recommendation regarding screening asymptomatic adults.

• U.S. Preventive Services Task Force – Hepatitis C Screening — recommendations for hepatitis C screening in adults.

• U.S. Preventive Services Task Force – HIV Screening — preventive HIV screening recommendations.

Medical recommendations evolve over time. Individual testing decisions should be based on current guidelines and the patient's medical circumstances.

About the Author

YiQiu Hu, NMD is an Arizona-licensed naturopathic physician and founder of Ask Dr. Hu. He provides concierge medicine, preventive healthcare, health optimization, diagnostic evaluation, and individualized medical care for adults throughout Arizona.

His clinical approach emphasizes thoughtful evaluation, appropriate laboratory testing, clear patient education, prevention, and individualized treatment planning rather than relying on one-size-fits-all testing or treatment protocols.

Medical Disclaimer: This article is intended for general educational purposes only and does not replace individualized medical advice, diagnosis, or treatment. Reading this article does not establish a physician-patient relationship. Laboratory testing should be selected and interpreted with an appropriately licensed healthcare professional based on your individual medical history and health needs.