Longevity Medicine vs Primary Care: What Your Annual Physical Is Not Measuring
Your primary care doctor checks your blood pressure, your fasting glucose, and your cholesterol. A longevity doctor measures your VO2 max, your visceral fat in sq cm, your resting metabolic rate, your fasting insulin, and 20 other markers your annual panel does not include. Both have a role. They are not substitutes.
- Board-certified bariatric surgeon, A4M member
- Speaker, Longevity Fest 2025
- Written by Dr. Meredith Sweeney, MD, FACS
30-minute call. No obligation. Membership-based practice. HSA and FSA eligible.
Reviewed by Dr. Meredith Sweeney MD, FACS
Board-certified bariatric surgeon, A4M member, founder of Sano Longevity in Middletown. Last updated July 2026.
Primary Care and Longevity Medicine Have Different Jobs. They Are Not Substitutes.
The most common confusion patients bring to a longevity practice is the assumption that longevity medicine is supposed to replace primary care, or that primary care is supposed to deliver longevity medicine. Neither is true. The two specialties have fundamentally different jobs, different timelines, and different definitions of success.
Longevity medicine is structured to identify the precursors to disease 10 to 20 years before they manifest clinically. VO2 max. Visceral fat in sq cm. Fasting insulin. Resting metabolic rate. The Omega-3 index. The 20+ markers that predict your metabolic trajectory before anything shows up on a standard panel. Longevity medicine is preventive by design. The two complement each other. The patient who has both is in the best position.
Sano Longevity at a Glance
Sano Longevity is a membership-based concierge longevity practice run by Dr. Meredith Sweeney, a board-certified bariatric surgeon. The practice runs a full diagnostic workup on every new patient and builds an individualized longevity plan from the data.
The Sano model:
Sano runs a full diagnostic workup on every new patient. The first appointment is fasted and in-office. It includes VO2 max on the PNOĒ platform, resting metabolic rate on PNOĒ, InBody 580 body composition (visceral fat in sq cm, segmental muscle mass), and a 46-marker longevity lab panel (subject to change) through Quest. About one month later, Dr. Sweeney spends 60 to 90 minutes walking through every result and building an individualized longevity roadmap.
What Sano measures that primary care does not:
VO2 max (the strongest predictor of all-cause mortality per the AHA). Resting metabolic rate (measured directly, not estimated from a formula). Visceral fat in sq cm (the dangerous fat that drives chronic disease). Fasting insulin (elevated in roughly 90% of new Sano patients). Omega-3 index. 46-marker longevity lab panel (subject to change) including 20+ markers that drive clinical decisions but are not on a standard primary care panel.
What Sano does not do:
Acute care, urgent care, immunizations, routine referrals, or insurance billing. Sano is not a replacement for primary care. It is a complement to primary care that adds the preventive diagnostic layer that insurance-billed primary care cannot deliver. Sano patients are encouraged to keep their primary care physician for acute and routine care.
The difference is the timeline. Primary care catches a problem when it shows up. Sano identifies the precursors to that problem 10 to 20 years before it shows up. “Your primary care doctor calculates your metabolic rate from a formula. We measure it.” Dr. Meredith Sweeney, MD, FACS
The Structural Reason Primary Care Cannot Deliver Longevity Medicine
The reason your primary care doctor does not run a 46-marker longevity lab panel (subject to change), measure your VO2 max, or spend 60 minutes building you an individualized longevity roadmap is not that your primary care doctor does not care. It is that the model your primary care doctor practices in does not allow for it.
Insurance does not reimburse longevity markers:
Insurance does not reimburse VO2 max because it is considered a fitness assessment. Insurance does not reliably reimburse fasting insulin because it is not on the standard diabetes diagnostic algorithm. Insurance does not reimburse the 20+ longevity markers that drive clinical decisions in a longevity practice.
The 12-minute appointment:
The average in-person primary care visit in the United States lasts 12 to 15 minutes. The economics of insurance reimbursement require a high volume of short appointments. A 60-minute longevity consultation is economically impossible inside an insurance-billed primary care practice.
The result:
Your primary care doctor is doing exactly what they are paid and structured to do. The gap between what they can deliver and what longevity medicine requires is not a personal failure. It is a structural one. Sano Longevity exists outside that structure, membership-based, with the equipment and the appointment length that longevity medicine actually requires.
The equipment is not there:
A PNOĒ VO2 max platform costs tens of thousands of dollars. An InBody 580 is a clinical-grade body composition analyzer that requires dedicated space and trained operation. Primary care offices are not built around this equipment because the reimbursement model does not support it.
Longevity Medicine vs Primary Care: Side by Side
| Primary Care | Longevity Medicine (Sano) | |
|---|---|---|
| Job | Detect and treat disease | Identify precursors, prevent disease |
| Appointment length | 12 to 15 minutes | 60 to 90 minutes (roadmap) |
| Insurance | Yes (most providers) | No (cash-pay, HSA/FSA eligible) |
| Acute care (illness, injury) | Yes | No |
| Routine screenings (mammogram, colonoscopy) | Yes | No (referred out) |
| Standard lipid panel | Yes | Yes (plus ApoB, LDL particle) |
| Fasting glucose | Yes | Yes |
| Hemoglobin A1c | Yes (when indicated) | Yes (always) |
| Fasting insulin | Rarely | Yes (always) |
| Omega-3 index | No | Yes |
| 46-marker longevity lab panel (subject to change) | No | Yes |
| VO2 max | No | Yes (PNOĒ) |
| Resting metabolic rate | No | Yes (PNOĒ) |
| Body composition (InBody 580) | No | Yes |
| Visceral fat in sq cm | No | Yes |
| 90-day CGM protocol | No | Yes (weight loss patients) |
| Individualized longevity roadmap | No | Yes (60-90 min appointment) |
| Same physician every visit | Varies | Yes (Dr. Sweeney) |
What a Longevity Workup Finds That a Primary Care Panel Misses
Across the first 200+ patients at Sano Longevity, Dr. Sweeney has documented consistent gaps between what the standard primary care panel reported and what the Sano workup found.
Omega-3 index:
Below 8% (the longevity-optimal threshold) in approximately 90% of new Sano patients. Most were taking oral fish oil. Most had indices below 3%, suggesting poor oral absorption. The primary care panel does not include this marker.
Fasting insulin:
Elevated (above 10 uIU/mL) in approximately 90% of new patients whose primary care panel showed normal fasting glucose. Fasting insulin predates blood sugar dysregulation by years or decades. It is not on the standard primary care panel.
Visceral fat:
High visceral fat area (above 100 sq cm) present in patients with normal BMI, normal waist circumference, and a primary care record that describes their weight as “normal.” BMI misses internal adiposity. The InBody 580 does not.
VO2 max:
Most new patients score in the low-to-moderate range (18 to 35 mL/kg/min). A 33% improvement in VO2 max corresponds to a 30 to 45% reduction in all-cause mortality risk per AHA data. The primary care annual physical does not measure VO2 max.
When to Add a Longevity Doctor to Your Care Team
The best time to add a longevity doctor to your care team is in your 30s, 40s, or 50s, when you still feel fine and your primary care panel still looks normal. The window for prevention is the window when nothing has gone wrong yet. Most patients who wait until something goes wrong are already past the point where prevention is the right tool.
Signs that a longevity workup is the right next step:
Your primary care panel looks normal but you feel like something is off.
You are gaining weight despite not changing your diet or exercise habits.
Your energy has declined and your primary care doctor has found nothing on standard tests.
You have a family history of cardiovascular disease, dementia, or metabolic disease and you want to know where your markers actually stand.
You have tried online GLP-1 or weight loss programs and the results did not hold.
Which One Do You Need? Usually Both.
Choose primary care if:
You need acute care, prescription management, immunizations, or routine screenings. You want insurance billing. You need a referral to a specialist. You have an active illness, injury, or ongoing condition that requires ongoing medical management. Keep your primary care physician. Sano does not replace this.
Choose to add Sano Longevity if:
You want to know your VO2 max, your visceral fat in sq cm, your fasting insulin, and your resting metabolic rate. You want a physician who spends 60 to 90 minutes building you an individualized longevity roadmap. You want the same board-certified surgeon at every appointment for the next 12 months. You want to identify the precursors to chronic disease before they show up on a primary care panel. You are in your 30s, 40s, or 50s and you want to add 20 years of quality life to the next 30.
Frequently Asked Questions
Five questions patients ask most often about longevity medicine and primary care.
What is the difference between longevity medicine and primary care?
Primary care medicine is structured to detect and treat disease after it shows up. Longevity medicine is structured to identify the precursors to disease 10 to 20 years before they manifest clinically. Your primary care doctor checks blood pressure, fasting glucose, and cholesterol. A longevity doctor measures VO2 max, visceral fat in sq cm, resting metabolic rate, fasting insulin, Omega-3 index, and 20+ other markers your annual panel does not include. Both have a role. They are not substitutes. They are complements.
Do I need a longevity doctor if I already have a primary care doctor?
You need both. Primary care is essential for acute illness, prescription management, immunizations, and routine medical work. Longevity medicine is essential for measuring the metabolic, cardiovascular, and body composition markers that predict your long-term trajectory. Your primary care doctor will catch a problem when it shows up. A longevity doctor identifies the precursors to that problem 10 to 20 years before it shows up.
What does a longevity doctor measure that primary care does not?
At Sano Longevity, the standard new patient workup includes VO2 max on the PNOĒ platform (the strongest predictor of all-cause mortality per the AHA), resting metabolic rate on PNOĒ, InBody 580 body composition with visceral fat measured in sq cm, and a 46-marker longevity lab panel (subject to change) through Quest that includes fasting insulin (elevated in roughly 90% of new Sano patients), Omega-3 index, Vitamin D, and 20+ other markers not on a standard primary care panel.
Why doesn't my primary care doctor measure VO2 max or fasting insulin?
Insurance does not reimburse VO2 max because it is considered a fitness assessment, not a medical test. Insurance does not reliably reimburse fasting insulin because it is not on the standard diabetes diagnostic algorithm. Insurance does not reimburse the 20+ longevity markers that drive clinical decisions in a longevity practice. Primary care physicians have neither the time, the equipment, nor the financial structure to deliver longevity medicine inside a 12-minute insurance-billed appointment.
When should I see a longevity doctor?
The best time to see a longevity doctor is in your 30s, 40s, or 50s, when you still feel fine and your primary care panel still looks normal. This is when the precursors to chronic disease are accumulating but not yet showing up on standard tests. A longevity doctor measures the markers that predict your trajectory and builds a plan to change it. The worst time is after your primary care doctor has already diagnosed you with a chronic illness, because by that point the prevention window has closed.
You Already Have a Primary Care Doctor. Now Add the Doctor Who Measures What Yours Does Not.
Book a free consultation. We will walk you through what the longevity workup covers, what we find, and whether Sano is the right complement to your current care.
We respond within 24 hours. No pitch. Just data. Or call (502) 208-6476.
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Reviewed by Dr. Meredith Sweeney MD, FACS
Founder, Sano Longevity in Middletown, Louisville. Board-certified bariatric surgeon. Fellow of the American College of Surgeons (FACS) and formerly the American Society for Metabolic and Bariatric Surgery (FASMBS). Member, American Academy of Anti-Aging Medicine (A4M). Speaker, Longevity Fest 2025. More than ten years of metabolic medicine experience at Norton Healthcare before founding Sano Longevity in March 2025.
Sano Longevity
(502) 208-6476