Glossary

The language of your care, explained

The terms you will meet in concierge medicine, prevention, diagnostics, and longevity, defined in plain language and linked so you can follow a thread from one idea to the next.

Care models & cost

How concierge, direct and traditional primary care differ, and what the fee actually covers

Annual membership fee

An annual membership fee is the recurring payment a patient makes to belong to a concierge or membership-based medical practice.

The fee generally covers access, time and coordination. Laboratory work, imaging, specialists and hospital care continue to bill separately, and the fee does not replace health insurance. What PrimaryMD’s membership includes, and what it costs, is set out in full.

Concierge medicine

Concierge medicine is a membership-based model of primary care in which patients pay a recurring fee for more direct physician access, longer visits, and ongoing coordination of their care.

The same model goes by several names, including boutique medicine, private primary care, high-touch primary care, and private doctor. Those labels are mostly marketing. What varies in practice is panel size, what the fee covers, whether families can join on one membership, and whether the practice provides clinical follow-through after a visit. It is worth comparing against direct primary care and traditional primary care before deciding. PrimaryMD practices this model across its New York, San Francisco and Los Angeles locations.

Direct primary care

Direct primary care is a membership model in which patients pay a monthly or annual fee directly to a primary care practice, which typically does not bill insurance for routine care.

Unlike most concierge medicine practices, direct primary care usually avoids insurance billing altogether, which tends to mean a lower fee and a narrower scope. Patients still need insurance for hospital care, specialists and imaging, and should understand how out-of-pocket care works around the membership.

HSA and FSA

An HSA or FSA is a tax-advantaged account used to pay for qualified medical expenses, subject to plan rules and current tax guidance.

Whether a concierge membership qualifies depends on how the fee is structured and on current guidance. That is a question for a plan administrator or tax adviser, not a medical practice. Individual services such as blood work are more often eligible than the membership itself.

Membership model

A membership model is the defined set of services a patient receives in exchange for a recurring fee paid directly to a medical practice.

Sometimes called membership medicine. A clear model states visit length, response times, what happens after testing, and where out-of-pocket care and insurance boundaries fall.

Out-of-network care

Out-of-network care is medical care from a clinician or facility that has no contracted rate with a patient’s health insurance plan, so the patient is billed directly.

Most concierge practices are out of network for the membership itself while remaining in network for other services, so the plan still matters. Ask what is billed through insurance, what is paid directly, and whether the practice issues a superbill.

Out-of-pocket care

Out-of-pocket care refers to medical costs a patient pays directly rather than through insurance reimbursement.

In concierge medicine the membership fee is normally out of pocket, while outside labs, imaging, prescriptions and specialists follow their own billing rules. Some of those costs may be recoverable through out-of-network reimbursement or paid from an HSA or FSA.

Physician-led care

Physician-led care means a physician remains responsible for clinical judgment, interpretation, and the next step in a patient’s care plan.

It separates a practice that produces data from one that produces decisions. Panel size, appointment length and board certification matter mainly because they leave a physician time to interpret. The physicians at PrimaryMD each hold the full picture for their own patients.

Primary care

Primary care is first-contact, ongoing healthcare covering prevention, common concerns, chronic conditions, and coordination of everything else.

It is the discipline underneath every model on this page, whether delivered by a physician trained in internal medicine or family medicine. What separates practices is whether one physician stays responsible for the whole picture. See physician-led care and care continuity.

Superbill

A superbill is an itemized medical receipt that some patients submit to their insurer for possible out-of-network reimbursement.

It lists the service, diagnosis and billing codes so a patient can pursue out-of-network reimbursement themselves. Membership fees are frequently not reimbursable, and no practice can guarantee what a given plan will pay.

Traditional primary care

Traditional primary care is the standard insurance-based model, in which patients see a primary care physician for routine visits, prevention, and common medical concerns.

Also called insurance-based primary care, it is the model most people already have, and for many patients it works well. The usual reasons for leaving are appointment length, wait times, and the absence of care coordination between visits.

Access & coordination

Getting seen, and keeping care connected between the people involved

24/7 physician access

24/7 physician access means a patient can reach a physician or care team outside standard office hours, within limits the practice states in advance.

After-hours access is only as good as its boundaries. Ask who answers, how quickly, and what happens overnight, at weekends and on holidays. It does not replace emergency care. PrimaryMD sets out its access commitments as part of membership.

Care continuity

Care continuity means a patient is known over time, so symptoms, lab trends, medications, and specialist input can be read in context.

Sometimes called longitudinal care. A physician who has watched your numbers move for five years reads a result differently from one seeing it for the first time. Continuity is what makes preventive care work, because risk is tracked across years instead of judged in one appointment.

Care coordination

Care coordination means organizing referrals, records, results, and next steps so a patient’s care holds together across every clinician involved.

It covers choosing the right specialist, getting the records there, and making sure the finding comes back into the plan instead of stopping at the specialist’s office. A referral without that step makes fragmented care worse. Coordination is a standing part of how PrimaryMD works, not something requested case by case.

Emergency care

Emergency care is medical care for potentially life-threatening or time-sensitive conditions that require immediate evaluation.

No membership, phone line or telemedicine service replaces 911, an emergency department, or hospital care. Chest pain, stroke symptoms, difficulty breathing, severe bleeding and sudden severe pain are emergencies. Call 911 first and tell your physician afterwards.

Fragmented care

Fragmented care happens when a patient’s medical information, decisions, and follow-up are spread across disconnected clinicians or systems.

It happens when several clinicians each hold part of the picture and nobody holds all of it. The result is repeated tests, contradictory advice, and findings nobody acts on. Reassembling that picture is much of what a coordinating physician does.

Same-day appointment

A same-day appointment is a visit offered on the same day a patient requests care, when it is clinically appropriate and availability allows.

It is one of the most common reasons people look for private care. It works only when paired with triage, so that someone decides what needs to be seen today, what can wait, and what belongs in emergency care. Availability varies by practice and by location.

Telemedicine

Telemedicine is medical care delivered by phone, video, or secure messaging instead of an in-person visit.

Virtual visits, portal messages and remote follow-up all sit under it. It works well for medication questions, results conversations, and care while travelling or living between cities. A physical examination, imaging and emergency care cannot happen over video.

Prevention & ongoing care

Screening, risk, and the long view of staying well

Annual physical

An annual physical is a routine yearly visit used to review health history, examine current concerns, update screenings, and plan prevention.

A thorough version reviews history, examines current concerns, updates screening and vaccinations, and sets the year’s plan. It is narrower than an executive physical. Its value depends on whether the findings feed an ongoing plan or are filed and forgotten.

Body composition

Body composition describes the proportions of fat mass, lean mass, and bone in the body.

Lean mass and fat distribution tell a more useful story than weight alone. Fat stored around the organs carries more metabolic and cardiovascular risk than the same weight carried elsewhere. A DEXA scan is the usual way to measure it.

Cancer screening

Cancer screening looks for signs of cancer or precancer before symptoms appear.

Colon, breast, prostate, cervical, lung and skin screening each carry their own age, interval and eligibility rules. Mammography and colonoscopy are the two most people meet first. Which apply depends on age, sex, family history and prior results, and every one of them has a false positive rate worth understanding before testing.

Cardiovascular risk

Cardiovascular risk is the likelihood of developing heart or blood vessel disease, based on factors such as blood pressure, cholesterol, blood sugar, smoking, and family history.

Blood pressure is the cheapest and most useful measurement in the category, and sustained high readings, known as hypertension, carry more weight than most advanced markers. Where more detail is warranted, a lipid panel, ApoB, Lp(a) and a coronary calcium score refine the picture.

Chronic disease management

Chronic disease management is ongoing care for long-term conditions such as high blood pressure, diabetes, asthma, or heart disease.

It makes up most of primary care: reviewing medications, watching trends, adjusting treatment, and keeping the specialists involved pointed in the same direction. It depends less on any single visit than on care continuity and follow-through between them.

Executive physical

An executive physical is a comprehensive preventive health evaluation combining physician assessment, laboratory testing, imaging, and risk review.

Sometimes marketed as executive health. It compresses a long physician assessment, advanced labs, imaging and a structured risk review into a single visit. It earns its cost when the findings produce a plan and someone follows it. See what is included at PrimaryMD.

GLP-1 medications

GLP-1 medications are drugs that affect appetite, blood sugar regulation, and weight in selected patients.

They are effective, but they are not a standalone plan. Dosing, side effects, nutrition, muscle preservation and what happens on stopping all need managing. Progress is best tracked alongside body composition, since losing lean mass and losing fat are not the same result.

Healthspan

Healthspan is the length of time a person lives in good functional health, rather than the total number of years lived.

Lifespan alone is a poor goal, because years spent in decline still count toward it. Most of what longevity medicine measures, including metabolic health, strength and aerobic fitness, is aimed at healthspan instead of the total.

Longevity medicine

Longevity medicine is a prevention-oriented approach focused on extending healthspan and reducing future disease risk.

Done well, it is preventive care with better measurement and a longer horizon. Done badly, it is test volume sold as foresight. What separates the two is whether a physician decides what to measure and what to do about the answer. That judgment is the part PrimaryMD builds around.

Metabolic health

Metabolic health describes how well the body regulates blood sugar, cholesterol, blood pressure, body composition, and energy use.

It is the common thread behind prediabetes, raised blood pressure and unfavourable lipids. Insulin resistance, where the body needs progressively more insulin to manage the same blood sugar, usually develops years before an A1C turns abnormal. That is why it is worth watching early.

Prediabetes

Prediabetes means blood sugar levels are higher than normal but not high enough for a diabetes diagnosis.

It is usually identified by an A1C or fasting glucose in the intermediate band. Acting early reliably changes the outcome. It is not a diagnosis of diabetes, and it is often reversible.

Preventive care

Preventive care is healthcare focused on reducing risk, finding problems earlier, and keeping patients healthier over time.

It covers screening, vaccination, risk review and lifestyle work, and aims to act before symptoms appear. Done well it is disciplined, not broad: the aim is to connect testing to clinical interpretation and a decision, not to accumulate more data.

Risk assessment

Risk assessment is the process of estimating a person’s chance of developing a health condition based on history, labs, lifestyle, and other factors.

It is also how patients get sorted by level of risk, so monitoring, testing and referral can be matched to the person. Good risk assessment decides which tests are worth doing, and which ones will not change a decision.

Tests, labs & imaging

What the common tests measure, and when they are worth doing

A1C

A1C is a blood test that estimates average blood sugar levels over roughly the previous three months.

Because it averages, it is steadier than a single fasting glucose. It is the standard test for identifying prediabetes and for monitoring diabetes over time.

Advanced labs

Advanced labs are blood or other tests that go beyond routine screening panels.

Biomarker panels, hormone testing, inflammatory markers and nutrient levels all sit here. Used selectively, they answer a specific question. Ordered as a bundle, they mostly generate false positives and further testing. Deciding which are worth running is a clinical judgment, not a menu.

ApoB

ApoB, or apolipoprotein B, is a blood marker that estimates the number of atherogenic particles involved in cardiovascular risk.

It counts particles instead of the cholesterol carried inside them, so it can reveal risk that a normal-looking lipid panel hides. It is most informative when cardiovascular risk is borderline and the treatment decision could go either way.

Blood work

Blood work refers to laboratory tests performed on a blood sample.

A routine draw usually covers a complete blood count, a metabolic panel, a lipid panel and A1C, with thyroid and vitamin D added when there is a reason to look. Drawing the blood is the easy part. What matters is which results change a decision.

Coronary calcium score

A coronary calcium score is a CT-based test that estimates calcified plaque in the coronary arteries.

A score of zero is reassuring for most middle-aged patients, and a high score can justify treating cardiovascular risk more aggressively. It is a quick, low-dose scan, and it is most useful when the decision is otherwise finely balanced.

DEXA scan

A DEXA scan is an imaging test that measures bone density and, in some settings, estimates body composition.

It reports bone density as a T-score, which is how osteopenia and osteoporosis are identified. The same scan can estimate body composition. Tracking the same measurement over several years is more informative than any single reading.

Full-body MRI

A full-body MRI is an imaging exam that scans many body regions at once, often marketed for early detection.

It uses no radiation, unlike CT, and it will find things. The question is what proportion of them matter. Most abnormalities picked up in someone without symptoms turn out to be incidental findings that lead to more scans instead of treatment. Worth doing with a physician who will help you decide in advance what you would do with each possible result.

Lipid panel

A lipid panel is a blood test that measures total cholesterol, LDL, HDL, and triglycerides.

LDL is the fraction most treatment decisions are built around. HDL and triglycerides add context, and raised triglycerides often point back to metabolic health as much as to diet. For some patients ApoB or Lp(a) sharpens the picture further.

Lp(a)

Lp(a), or lipoprotein(a), is a largely inherited blood marker associated with cardiovascular risk in some patients.

It is genetically set and stable through life, so it usually only needs measuring once. A raised result will not shift with diet, but it does change how aggressively the other cardiovascular risk factors are worth treating. It is also a good reason to ask about family history.

Screening test

A screening test looks for signs of disease or risk in people who have no symptoms.

That last part changes the arithmetic. The rarer the condition in the group being screened, the larger the share of positives that will be false. Age, history and risk decide which tests are worth running at all.

VO2 max

VO2 max is a measure of how much oxygen the body can use during intense exercise, and is the standard marker of cardiorespiratory fitness.

It is among the strongest single predictors of long-term mortality, and unlike most markers it responds directly to training. Formal testing on a treadmill or bike is more accurate than a watch estimate, and is worth doing when the number will shape a training plan.

Wearable data

Wearable data includes health and fitness measurements collected by devices such as watches, rings, or sensors.

Resting heart rate, heart rate variability and sleep staging are the measurements people bring to appointments most often. They show trends well and diagnose poorly. A single night’s reading means very little, and none of it substitutes for evaluation when something is wrong.

Understanding your results

How to read a result, and what should happen after it

Clinical follow-through

Clinical follow-through is the process of acting on results, referrals, symptoms, or treatment decisions after the initial appointment.

A test, a referral or a recommendation has little value until someone closes the loop on it. Follow-through is what makes a practice accountable for the plan, not just for the appointment. See how that loop gets closed.

Clinical interpretation

Clinical interpretation is the physician’s process of explaining what a result means for a specific patient.

A result can be technically normal and still matter, or flagged abnormal and change nothing. Interpretation is where history, trend, medications and the reason for testing are combined into a decision. It is the step most often missing when patients arrive holding a folder of results nobody has explained. At PrimaryMD it is a scheduled part of care, not an afterthought.

Diagnostic testing

Diagnostic testing includes lab tests, imaging, measurements, or procedures used to answer a specific medical question.

Unlike a screening test, diagnostic testing starts from something concrete: a symptom, a finding, or a decision that needs resolving. The distinction matters, because it changes how the same result should be read.

False positive

A false positive is a test result that suggests a condition may be present when it is not.

Its mirror image, a false negative, misses a condition that is present. Both are a normal property of testing, not a mistake. That is why the question to ask before any test is what you would do with each possible answer.

Incidental finding

An incidental finding is an unexpected result discovered during testing or imaging performed for an unrelated reason.

They are common in broad imaging such as a full-body MRI. Some matter a great deal and most do not. The difficulty is that telling them apart often takes further scans, a period of waiting, and occasionally a biopsy.

Lab reference range

A lab reference range is the interval a laboratory uses to flag whether a result falls within expected values for a reference population.

Ranges are drawn from a reference population, not from what is optimal for you, and they differ between laboratories. A result just outside the range is often unremarkable. One sitting comfortably inside it can still be a meaningful change from your own previous values.

Second opinion

A second opinion is an additional medical review used to confirm, challenge, or clarify a diagnosis or treatment plan.

Worth seeking when a diagnosis is serious, the treatment is hard to reverse, or the explanation has not made sense. It works best when the second physician receives the full records and images, not a summary. PrimaryMD physicians review outside findings as part of ongoing care.

Definitions are a starting point. Your situation isn't.

These terms explain the language you will meet in concierge medicine. What they mean for you depends on your history, your risks, and what you are trying to achieve. That is the conversation to have with a physician.

Meet the physicians who provide this care

General information, not medical advice. Speak with your physician about your own circumstances. In an emergency, call 911.