The home of ESG. With options beyond ESG.
Beyond ESG, Everself Nashville offers several non-surgical paths to weight loss — whichever fits your case best.
A 60-minute, non-surgical weight loss procedure, performed by Dr. Callahan in Nashville, TN. Options include ESG (endoscopic sleeve gastroplasty), plus gastric balloon and bariatric revision. Home the same afternoon.

Dr. Zachary M. Callahan
Jefferson-trained bariatric surgeon
As seen in
#1 in Nashville
Endoscopic weight care
We invented ESG
At Harvard, 2012
40+ lbs
20% avg. weight loss
60 min
Home the same day
Beyond ESG, Everself Nashville offers several non-surgical paths to weight loss — whichever fits your case best.
Where Everself Nashville performs ESG
Tennessee Surgery Center is an outpatient surgery facility on 42nd Avenue North, Nashville — minutes from Vanderbilt University Medical Center, with modern recovery suites and free on-site parking.

Tennessee Surgery Center
Every Everself Nashville procedure is performed here.
Your Nashville team

Led by Dr. Zachary M. Callahan
Everself Nashville is led by Dr. Zachary M. Callahan, a board-certified bariatric and minimally invasive surgeon advancing both incision-free and robotic weight-loss care. He trained at Thomas Jefferson University in Philadelphia, where he performed over 1,100 general surgery cases and earned seven teaching awards, followed by a competitive Minimally Invasive Surgery fellowship at NorthShore in Chicago. Dr. Callahan has authored more than 30 peer-reviewed publications and is an active member of SAGES, the American Foregut Society, and the American Society for Metabolic and Bariatric Surgery.
Robotic + Endoscopic
Bariatric surgeon
U Cincinnati
Medical degree
Jefferson
Surgical Chief Resident
NorthShore Chicago
MIS fellowship
Real Everself patient results
What is ESG (Endoscopic Sleeve Gastroplasty)
1
A virtual consultation from the comfort of your home with your Nashville specialist provider. Comprehensive metabolic labs, one all-in cost, no upsell.
2
Through your mouth, your doctor places 7–10 sutures, reducing the stomach size by ~75%. Home the same day. No incisions, no scars.
3
The Everself Program — dietitian, 24/7 nurse practitioner on call, group support, and a peer community for the full year.
If you're comparing options
What to expect
Done entirely from home. No need to visit a physical center.
1
A 45-minute video call with your provider.
2
Visit a LabCorp near you for pre-procedure labs.
3
A nurse or health coach on your case, prepping you for procedure day.
Plan on about half a day at Tennessee Surgery Center. Home the same afternoon.
1
Plan to arrive about one hour before your procedure.
2
Standard general anesthesia. No incisions — work happens internally.
3
Once recovery checks are complete, a friend or family member takes you home.
12 months of concierge care, delivered virtually from the comfort of home.
1
Complimentary IV hydration at a partner site near you.
2
Liquids to soft foods, guided by your dietitian. Gentle exercise from week one.
3
Designed to help you transition to a healthier lifestyle — dietitian, group visits, nurse practitioner, community support. Full program below ↓
Patient stories from the Everself network
Great all around! The team has taken great care of me. I look forward to my continued journey, care, and support with Everself!
Smooth process and staff had such great bedside manner. I’m looking forward to seeing my progress
Extremely knowledgeable staff who provide excellent eduction from initial intake through day one post op. Tennessee Surgery Center and Dr. Thompson and his nurse Sheri were nothing short of phenomenal. Would highly recommended to anyone seeking ESG or TORE.
The Everself Program
ESG is the procedure. The Everself Program is the team around it — a personal dietitian, a nurse practitioner on call 24/7, a care manager you can text, and a peer community you keep for life.
Nurse practitioner
Registered dietitian
Nurse care manager
Patient coordinator
"The staff is incredible to say the least and they really do demonstrate their care for their clients."
Two to three days of rest and gentle return to normal, then a full first month with your Nashville nurse care manager checking in daily and an Everself provider one tap away around the clock.
1-on-1 coaching from a personal dietitian, weekly group sessions, and (if you want it) an optional GLP-1 add-on to amplify results in the first year.
Fine-tune your weight loss and graduate into a lifetime patient community. Final provider check-ins make sure you're on track for years, not months.

For out-of-town patients
Everself patients receive a special discount at Fairfield by Marriott Inn & Suites Nashville Near Vanderbilt, and Element Nashville Vanderbilt West End, located just 5 to 7 minutes from Tennessee Surgery Center, our procedure location.
Pricing
Self-pay, no insurance to wrangle. Pay with HSA or FSA, or finance through Cherry or CareCredit (0% APR options for qualified applicants).
See full pricing breakdown →ESG · all-in
$12,995
Procedure + 12 months of concierge care
Financing
From $297 / mo
Through Cherry or CareCredit · HSA / FSA accepted · 0% APR for qualified applicants
or talk to the team · (615) 437-7266
A drug-free, non-surgical, fully reversible path to weight loss.
$7,495
from $172/mo · Cherry / CareCredit / HSA / FSA
A non-surgical revision for those regaining weight after gastric sleeve.
$11,995
from $275/mo · Cherry / CareCredit / HSA / FSA
A non-surgical revision for those regaining weight after gastric bypass.
$11,995
from $275/mo · Cherry / CareCredit / HSA / FSA
To get an endoscopic weight loss procedure in Nashville, please schedule a virtual consultation with one of our nurse practitioners or physician assistants to determine your eligibility. We don't accept walk-ins.
To be eligible for one of our endoscopic weight loss procedures (such as endoscopic sleeve gastroplasty, gastric balloon, or revision of prior bariatric surgery), you must have a BMI over 30, or a BMI between 27 and 29.9 with conditions like high blood pressure, diabetes, high cholesterol, sleep apnea, or fatty liver disease.
For an endoscopic revision of prior bariatric surgery, you must have had a gastric bypass or gastric sleeve surgery.
Our team invented endoscopic sleeve gastroplasty (ESG) at Harvard Medical School and authored both the official ESG protocol and the field's best-practice technique standard — so when you choose Everself, you're choosing the source.
Technique matters: ESG outcomes vary substantially with suture count, the stitch pattern, and whether each bite captures full-thickness tissue. Traditional ESG uses 3 to 5 sutures; the Everself protocol uses 7 to 10 — up to double the structural anchoring — and each stitch grabs full-thickness gastric wall, which is what makes the reduction durable years out.
The procedure is also only half of the program. We co-authored a 12-month longitudinal-care protocol that goes far beyond passive check-ins: every patient is supported by a dedicated care coordinator, a registered dietitian, group support cohorts, and a 24/7 nurse practitioner on call.
This combination of inventor-grade technique plus a true 12-month program is what sets Everself apart from any other ESG provider.
Endoscopic sleeve gastroplasty (ESG) is a less invasive, non-surgical weight loss option with a quicker recovery, no scarring, and fewer complications, typically requiring 1 to 3 days off work. In contrast, sleeve gastrectomy is a surgical procedure with more significant weight loss but involves a longer recovery, hospital stay of 1 to 3 days, and 2 to 4 weeks off work.
Consult with our clinical team or your healthcare provider to determine the best option for you.
Everself Nashville · with Dr. Callahan
45-minute virtual consultation. No obligations.
Bariendo is now Everself. Learn more