Were You Overcharged?

Enter your procedure and hospital. We'll show you exactly what Medicare pays — and how much more your hospital charged.

1What procedure did you have?
All
Outpatient
Inpatient
colonoscopy cataract surgery gallbladder heart bypass knee replacement sepsis
2Which hospital?
3What were you billed? (optional)

Uses CMS Medicare billing codes (APC/DRG), 2022. Now supports common names — try "colonoscopy," "cataract surgery," "gallbladder," or "heart bypass." Markup = hospital's avg submitted charge ÷ avg Medicare allowed amount.

Your Dispute Letter
Copy this letter and send it by certified mail to the hospital's billing department. Keep a copy for your records.
Download .txt

Frequently Asked Questions

How do I know if my hospital overcharged me?

Search your procedure in the Bill Check tool above. Enter your hospital name and the procedure (by name or CPT code). The tool compares the hospital's average submitted charge against the Medicare allowed amount for the same procedure. A markup ratio above 5× is worth investigating; above 10× is uncommon and may warrant a formal dispute.

What is the Medicare allowed amount?

The Medicare allowed amount is what CMS determines is a reasonable total payment for a service — including both Medicare's payment and the patient's cost-sharing portion (deductible/copay). It is set by CMS's fee schedule and is commonly used as a benchmark for "fair market" pricing of medical procedures.

Why do hospitals charge so much more than Medicare rates?

Hospitals set a "chargemaster" — an internal price list — that is used as the starting point for negotiations with insurance companies. Inflated chargemaster prices give hospitals more leverage in those negotiations. The unintended consequence is that uninsured patients, who have no negotiated rate, are billed at or near these inflated chargemaster prices.

Can I negotiate my hospital bill?

Yes. Ask the hospital billing department for their financial assistance policy (required under IRS 501(r) for nonprofits). Reference the Medicare rate in your negotiation. Many hospitals accept 20–40 cents on the dollar for uninsured patients who ask. Use AccountableHub's Dispute Letter Generator to create a formal dispute referencing the markup data.

What if my procedure isn't in the database?

AccountableHub's database covers procedures reported to CMS Medicare under the outpatient and inpatient hospital PPS (Prospective Payment System). Some procedures performed only in physician offices, ambulatory surgery centers, or by specialty providers may not appear. Try searching by the CPT code from your Explanation of Benefits (EOB), or a closely related procedure name.

Not legal, medical, or financial advice. AccountableHub provides information and self-help tools. We are not a law firm, and using this site does not create an attorney-client relationship. Dispute letters are templates you review, edit, and send yourself. Markup figures compare a hospital's average charge with Medicare's average allowed amount from public CMS data (2022) and do not mean your specific bill is unlawful. Attorney grades summarize public bar records that may be incomplete or out of date. Always verify with the state bar. For legal advice, consult a licensed attorney in your state; for medical decisions, consult your clinician.