Roux-en-Y gastric bypass is billed under CPT 43644 when it is done laparoscopically, and it is the operation that has been gaining ground. It creates a small stomach pouch and reroutes the small intestine, which is a materially different piece of surgery from a sleeve, where the surgeon removes part of the stomach and leaves the plumbing alone.
That difference is why bypass costs more, and the gap is remarkably consistent. Every center that publishes both prices charges more for the bypass, by amounts ranging from $2,000 to $6,400. This guide breaks down the cash bundles, the Medicare anchor, and exactly which line items produce the premium, using 2026 published prices and 2024 CMS data.
What Does Gastric Bypass Cost Without Insurance?
A published all-in cash bundle runs $11,995 to $18,650 as of September 2026. The marketplace range is wider, running to $30,860.
| Price you might be quoted | Low | Typical | High |
|---|---|---|---|
| Surgeon fee only, Medicare-allowed (CPT 43644) | n/a | $1,172 | n/a |
| Surgeon fee only, average billed charge | n/a | $6,178 | n/a |
| All-in cash bundle, published center prices | $11,995 | $14,052 | $18,650 |
| MDsave marketplace, gastric bypass Roux-en-Y | $12,966 | $21,330 | $30,860 |
| MDsave’s estimated national average benchmark | n/a | $36,125 | n/a |
| Revision surgeon fee, Medicare-allowed (CPT 43848) | n/a | $1,301 | n/a |
| Revision surgeon fee, average billed charge | n/a | $8,017 | n/a |
| Sleeve surgeon fee, Medicare-allowed (CPT 43775), for comparison | n/a | $710 | n/a |
The three published bundles come from centers that post their self-pay rates openly. Alabama Surgical Associates in Huntsville lists $11,995, covering the surgeon’s professional fees, anesthesia, facility fees and an overnight hospital stay. The Nicholson Clinic in Dallas lists $14,052, which includes the surgeon, the hospital facility fee, all routine hospital charges with one night in hospital, anesthesia, pre-op labs and an EKG in its own office, a pre-op dietitian visit, and office visits before and after surgery for life. The Bariatric and Metabolic Center of Colorado lists $18,650, which includes an initial consultation, a psychological evaluation, a dietary consultation, bariatric education and up to three months of post-op care.
The surgeon-fee figures come from the CMS Medicare Physician and Other Practitioners dataset for the 2024 data year, released in May 2026. Nationally, 1,320 providers billed CPT 43644 in a facility setting across 2,866 services, submitting an average charge of $6,178 and being allowed an average of $1,172 by Medicare. That is the professional fee alone, with facility and anesthesia still to come.
Why a Bypass Prices Above a Sleeve
More surgical work, and Medicare prices it that way. The 2024 Medicare-allowed amount for CPT 43644 is $1,172 against $710 for the sleeve code, roughly 65 percent more for the same surgeon in the same setting. The average submitted charge follows the same pattern, $6,178 versus $4,752.
A hospital night is built into the price. Alabama Surgical’s bypass package explicitly includes an overnight hospital stay while its sleeve package does not. Nicholson’s bypass includes one night in hospital and all routine hospital charges for it, while it notes most sleeve patients go home the same day from a surgery center. That single line accounts for much of the gap.
More pre-operative work-up is bundled in. The Colorado center’s $18,650 bypass price includes the psychological evaluation, dietary consultation, physician consultation and a pre-surgical meeting with the surgeon, plus up to three months of post-operative care. When a package absorbs the work-up, the headline number rises even though your total spend may not.
The arithmetic, center by center. Alabama Surgical charges $9,995 for a sleeve and $11,995 for a bypass, a $2,000 premium. Nicholson charges $10,500 and $14,052, a $3,552 premium. The Colorado center charges $12,250 and $18,650, a $6,400 premium. Where a center absorbs more of the surrounding care, the premium is larger.
What Drives the Price
Comorbidities and complexity
Gastric bypass is frequently chosen for patients with type 2 diabetes or significant reflux, which means the average bypass patient carries more comorbidity than the average sleeve patient. Comorbidity moves hospital billing, because a stay that codes with a complication or comorbidity lands in a higher-paying diagnosis group than an uncomplicated one. Our bariatric surgery cost guide carries the CMS hospital charge and payment figures for each of those groups.
Where the operation happens
A cash bundle that includes hospital nights will always price above one that does not. Every bypass package on this page includes at least one night, which is a structural reason bypass bundles cluster higher than sleeve bundles rather than a reflection of surgeon pricing.
Whether it is a first operation or a revision
Bypass revision is its own market, and a thin one. CMS’s 2024 file shows only 83 providers nationally billing CPT 43848, revision of a gastric bypass for obesity, across 104 services, with an average submitted charge of $8,017 for the surgeon’s portion and an average Medicare-allowed amount of $1,301. That is a higher professional fee than a first-time bypass and a fraction of the volume, which is exactly why nobody quotes a revision off a price list. The price depends entirely on what needs undoing.
What sits outside the number
The exclusion list is where a fixed price stops being fixed. Treatment of complications is excluded from essentially every cash bundle, as are extra operating room time, hospital nights beyond the stated stay, professional fees for radiology and pathology, post-operative blood work and prescriptions. Nicholson states that its prices do not include post-operative blood work or any prescriptions.
Cash Price vs. Insurance
Gastric bypass has one genuine coverage advantage over the sleeve, and it is worth knowing before you write a check. Medicare’s National Coverage Determination 100.1 lists open and laparoscopic Roux-en-Y gastric bypass among the procedures covered nationally, alongside biliopancreatic diversion with duodenal switch and laparoscopic adjustable gastric banding. Sleeve gastrectomy is not on that national list; since June 2012 it has been left to individual Medicare Administrative Contractors to decide.
The conditions are the same either way: a body mass index of 35 or higher, at least one comorbidity related to obesity, and a patient who has been previously unsuccessful with medical treatment for obesity. Treatment for obesity alone, without a qualifying comorbidity, is not covered.
That matters practically. If you are close to qualifying, the bypass is the operation with the cleaner national coverage pathway, which can be worth several months of documentation rather than several thousand dollars of cash. If you are not going to qualify, or cannot wait through the work-up, the published bundles above are the realistic comparison set.
Either way, if a hospital is involved, do not treat the first number you hear as the price. Hospital charges for an obesity-surgery stay run roughly five times what hospitals actually collect, and that gap is your negotiating range. Our how to negotiate medical bills guide has the exact language to use.
How to Pay Less
Ask every center to quote the sleeve and the bypass side by side. The premium is $2,000 at one center and $6,400 at another for the same pair of operations, which tells you a lot about what each package absorbs. Which operation is right for you is a medical decision, but knowing the spread keeps you from overpaying for either.
Get the exclusion list in writing before you compare headline numbers. Ask specifically what happens if you need a second night, what a complication costs, and whether the psychological evaluation and post-operative labs are inside or outside. Run the total through our fair price checker.
Price a bundle that includes the work-up, then price one that does not. A $14,052 package with lifetime office visits and a $18,650 package with the psych evaluation and three months of care built in can end up costing less in total than a cheaper package that bills each piece separately.
Apply for charity care before surgery if a nonprofit hospital is involved. A bypass performed on a patient meeting medical criteria is medically necessary care rather than cosmetic, so it is generally eligible. Screen yourself with our charity care checker, then work through our hospital charity care guide.
Audit the itemized bill if anything arrives after a package price. A flat quote followed by separate envelopes usually means something fell outside the bundle, and the line items tell you what. Our itemized hospital bill guide covers the request and the review, and our negotiation script covers the call.
Budget the follow-up, not just the operation. A bypass reroutes the small intestine, so lifelong vitamin supplementation and lab monitoring are part of the cost of the decision, and no package covers them past its stated window.
The Bottom Line
Budget $12,000 to $21,300 for a gastric bypass paid in cash as of September 2026, and treat any quote in the low four figures as the surgeon’s fee alone. The published bundles sit at $11,995, $14,052 and $18,650, and the differences between them are hospital nights and how much of the work-up is folded in, not surgical quality.
If you are still choosing between operations, our gastric sleeve cost guide prices the cheaper one in the same format, and our bariatric surgery cost guide lays the whole category out side by side, including the duodenal switch, balloons and revisions. If you are weighing surgery against medication instead, start with our GLP-1 cost guide and check the posted cash price file at any hospital you are considering using our hospital price transparency walkthrough.