The letter arrives and it feels personal. Your doctor recommended a procedure, you assumed your insurance would cover it, and instead you get a denial — a form letter that reduces your health to a billing code. You are far from alone. Nearly one in five in-network insurance claims are denied in the United States, and for certain procedures the denial rate climbs above 30%.
This guide is for anyone staring at a denial letter right now. Not a vague "talk to your insurance company" brush-off, but every concrete path forward — from appeals to cash-pay pricing to having the same procedure performed abroad at a fraction of the cost.
Why insurers deny coverage
Understanding the reason behind the denial is the first step toward beating it. Denials generally fall into a few categories, and each one has a different counter-strategy.
Medical necessity denials are the most common for elective and semi-elective procedures. Your insurer's medical director decided the procedure isn't "medically necessary" based on their internal criteria — which often differ from your surgeon's clinical judgment. Bariatric surgery, certain orthopedic procedures, fertility treatments, and dental implants are frequent targets.
Prior authorization failures happen when the procedure required pre-approval and it wasn't obtained — or was obtained but expired. This is a paperwork problem, not a medical one, and is often the easiest to fix.
Out-of-network denials mean the provider isn't in your plan's network. The procedure may be covered, just not at that facility or with that surgeon.
Exclusion denials are the hardest to fight. Your plan explicitly excludes the procedure — cosmetic surgery, weight loss surgery on certain plans, fertility treatments in states without mandates, adult dental work on medical-only plans. No appeal will change contract language.
Option 1: Appeal the denial
Insurance companies count on most people accepting the denial without fighting. The data suggests they shouldn't. Depending on the state and insurer, between 40% and 60% of appealed denials are overturned at some stage of the process.
Internal appeal
Your first step is the insurer's own internal appeal process. Request a copy of the clinical criteria they used to deny your claim — you're legally entitled to this under the ACA. Have your doctor write a letter of medical necessity that directly addresses each point in their denial rationale. Include any supporting documentation: imaging, lab results, prior treatment history showing conservative measures failed, peer-reviewed studies supporting the procedure.
External review
If the internal appeal fails, you have the right to an independent external review. A third-party physician who has no financial relationship with your insurer reviews your case. External reviews overturn the insurer's decision roughly 40–50% of the time, depending on the state and procedure.
State insurance department complaint
If you believe the denial violates your state's insurance regulations, file a complaint with your state's Department of Insurance. Some states have patient advocate offices that will intervene directly.
Option 2: Cash-pay pricing in the US
If appeals fail or your plan explicitly excludes the procedure, the next question is what it actually costs to pay out of pocket. The answer is often far less than you think — because the prices your insurer "negotiates" have almost nothing to do with what a procedure actually costs.
Many hospitals and ambulatory surgery centers now publish cash-pay rates that are 40–60% lower than their chargemaster prices. The Hospital Price Transparency Rule (effective since 2021) requires this, though compliance is uneven.
Ambulatory surgery centers (ASCs) typically charge 30–50% less than hospitals for the same procedure. For knee arthroscopy, hernia repair, and many cosmetic procedures, the ASC route can cut your bill in half.
Option 3: Medical tourism
For procedures costing $10,000 or more in the US — even at cash-pay rates — having the same procedure performed abroad can save 50–80%. This isn't a fringe decision anymore. Over 2 million Americans traveled abroad for medical care in recent years, and the number is growing as US healthcare costs continue to outpace inflation.
Colombia, ranked #1 in the Western Hemisphere and #22 globally for healthcare quality by the World Health Organization (2000 World Health Report), has emerged as one of the strongest destinations for American patients. The country has six JCI-accredited hospitals, board-certified surgeons verifiable through the national ReTHUS database, and procedures priced 50–80% below US equivalents.
| Procedure | US typical | Colombia typical | Savings |
|---|---|---|---|
| Gastric sleeve | $16,000–$22,000 | $4,500–$6,500 | 65–75% |
| Knee replacement | $35,000–$55,000 | $10,500–$12,000 | 70–80% |
| All-on-4 dental | $25,000/arch | $6,500–$11,000 | 55–75% |
| IVF cycle | $15,000–$25,000 | $4,000–$7,000 | 65–75% |
| Mommy makeover | $15,000–$25,000 | $6,000–$10,000 | 55–65% |
| LASIK (both eyes) | $4,000–$6,000 | $1,000–$1,500 | 70–80% |
All figures are typical 2026 ranges, not quotes. Actual costs vary by provider, complexity, and exchange rate. USD/COP has moved approximately 15% across 2026.
Option 4: Financing and tax strategies
If you're paying out of pocket — whether domestically or abroad — several financial tools can reduce the burden.
HSA and FSA funds can be used for medically necessary procedures even if insurance denied coverage. The IRS definition of "medical care" under Publication 502 is broader than most insurance plans. Airfare and lodging (up to $50/night) for medical care are also eligible expenses.
Medical loans through CareCredit, Prosper Healthcare Lending, and similar providers offer 0% promotional periods ranging from 6 to 24 months. The key is paying the balance before the promotional period ends — deferred interest is retroactive.
Tax deductions are available for medical expenses exceeding 7.5% of your adjusted gross income. If you're paying $15,000+ out of pocket, you may be above that threshold. This includes travel costs for medical care.
Option 5: Alternative coverage paths
Depending on your situation, you may qualify for coverage through a different path entirely.
Marketplace plans during open enrollment may cover procedures your current plan excludes. Review the Summary of Benefits and Coverage (SBC) for any plan you're considering — look specifically for the procedure you need.
Medicaid expansion states cover bariatric surgery, many dental procedures, and fertility treatments that private plans often exclude. Income thresholds vary by state.
Clinical trials can provide access to cutting-edge treatments at no cost. ClinicalTrials.gov lists active trials by condition and location.
What to do right now
If you're reading this with a denial letter in hand, here's your immediate action plan:
- Note the appeal deadline on your denial letter. Put it in your calendar with a one-week reminder.
- Request the clinical criteria your insurer used to deny the claim. Call the number on the denial letter.
- Talk to your doctor about writing a letter of medical necessity for the appeal.
- Get a cash-pay quote from your current provider and at least one ASC.
- Get an international quote to understand the full range of what your procedure costs worldwide.
- Check your HSA/FSA balance and review IRS Publication 502 for eligible expenses.
Ready to explore your options?
Colombia is ranked #1 in the Western Hemisphere for healthcare quality (WHO). See what medical care costs with board-certified specialists.
Explore medical care in Colombia →Frequently asked questions
Can I appeal an insurance denial for surgery?
Yes. You have the right to appeal any insurance denial. Start with an internal appeal to your insurer, then request an independent external review if the internal appeal fails. Between 40% and 60% of appealed denials are overturned at some stage. Check your denial letter for the appeal deadline — most plans give you 180 days, but some allow as few as 60.
What procedures are most commonly denied by insurance?
Bariatric surgery (gastric sleeve, bypass), fertility treatments (IVF), dental implants, cosmetic procedures deemed non-medically-necessary, certain orthopedic procedures (knee and hip replacement may require documented conservative treatment failure), and spinal surgeries are among the most frequently denied categories.
Is medical tourism safe after an insurance denial?
Medical tourism to accredited facilities with board-certified surgeons can be a safe and cost-effective alternative. The key is verification: look for JCI-accredited hospitals, verify surgeon credentials through national databases (like ReTHUS in Colombia), and ensure the facility follows international safety protocols. Colombia is ranked #1 in the Western Hemisphere for healthcare quality by the WHO.
Can I use my HSA or FSA for surgery abroad?
Yes. HSA and FSA funds can be used for qualified medical expenses regardless of where the care is provided. Under IRS Publication 502, this includes the procedure itself, airfare, and lodging up to $50 per night. The procedure must meet the IRS definition of medical care, which is broader than most insurance plan definitions.
How much can I save with medical tourism vs paying cash in the US?
Savings vary by procedure, but patients typically save 50–80% compared to US cash-pay prices. A gastric sleeve that costs $16,000–$22,000 in the US is typically $4,500–$6,500 in Colombia. A knee replacement at $35,000–$55,000 domestically is $10,500–$12,000. Even after including flights, accommodation, and meals, the total cost is usually 40–70% less.