Audit a hospital bill against Medicare rates with an AI chatbot

Get the itemized bill with billing (CPT) codes, then have an AI chatbot compare each line to Medicare rules to find duplicate and mis-coded charges.

Part of: How to negotiate a medical bill

Reported result$195,000 hospital bill settled at about $33,000As reported by Tom's Hardware (reporting a Threads post by @nthmonkey). Results vary.

Cost Free option availableYou can do this for $0. Some tools offer paid upgrades you don't need.

Time (estimate)2–5 hrs over a few weeks

Difficulty (estimate)InvolvedSeveral steps or follow-ups over days or weeks.

Interactive

Build my prompt

Fill in what you know and the text below updates as you type. Everything stays in your browser: nothing is saved, sent or tracked. Leave out account numbers and SSNs.

Your personalized prompt (paste your itemized codes at the end)

I'm disputing a $[Total billed] bill from [Hospital or provider] for services on [Date(s) of service]. My insurance status: [Insurance status]. Below is the itemized list of CPT/HCPCS codes, descriptions, units and charges (personal details removed). For each line: 1) explain what it is in plain English, 2) estimate what Medicare would typically pay for it and tell me where to verify that, 3) flag possible duplicates, unbundled components of a larger procedure, wrong place-of-service or inpatient/outpatient coding, and charges that don't match the services described. Then list the lines I should contest, with the reason for each. Mark anything you're unsure about so I can check it.

[PASTE ITEMIZED CODES HERE]

Billing dispute letter

Template, not legal or financial advice. Check every fact, date and amount, add your own details, and keep a copy of what you send.

[Your name]
[Your address]
[Date]

[Hospital or provider], Patient Billing Department

Re: Billing dispute, account [Account / statement number], date(s) of service [Date(s) of service]

I'm writing to dispute charges on my bill of $[Total billed]. After reviewing the itemized bill, I believe the following lines are incorrect:

[Line / code / charge: reason, e.g. duplicate, unbundled, service not received]
[Line / code / charge: reason]

Please 1) review these charges and send a corrected itemized bill, 2) place my account on hold and don't send it to collections while the review is pending, and 3) send me your financial assistance (charity care) application if I may qualify.

Please reply in writing.

Sincerely,
[Your name]

Follow these steps

Call the billing office and request a fully itemized bill with CPT/HCPCS codes (and your medical record if needed).
Remove your name, date of birth, account numbers and insurance IDs before uploading anything.
Ask the AI to list each code, explain it in plain English, and flag duplicates, unbundled components and coding mismatches.
Verify the flagged items yourself using CMS's fee schedule lookup and the hospital's own price list.
Send a factual, written dispute that lists each contested line, asks for a corrected bill, and asks for a hold on collections while it is reviewed.

Remember my checkmarks on this device (stored only in your browser; uncheck to erase)

What to expect, and what to do if they say no

What to expect

Getting an itemized bill with codes can take 1–3 weeks. Ask for it in writing.
Billing offices often fix clear errors after a written dispute but rarely respond on the first call.
Uninsured or self-pay patients usually have more room to negotiate than insured patients.

If they say no

Ask for a supervisor or the patient advocate/ombudsman office, and ask for a hold on collections in writing.
Apply for the hospital's financial assistance (charity care). Nonprofit hospitals must have a policy.
Offer a lump-sum settlement or ask for an interest-free payment plan.
File a complaint with your state attorney general or insurance department if you think the billing is improper.

What happened when people tried it

Reported A $195,000 bill for four hours of care was settled at about $33,000, as reported by the poster.

What the AI did: After a relative's fatal heart attack, the family requested the itemized codes. Claude analyzed them against Medicare rules, flagged components billed on top of a master procedure, inpatient-vs-emergency coding issues and same-day ventilator billing, and helped draft dispute letters. The analysis was cross-checked with ChatGPT.

Source: Tom's Hardware (reporting a Threads post by @nthmonkey) · 2025-10-29 · Self-reported; not independently verified
Reported Headline: 'I Used Claude to Save $163,000 on a Hospital Bill.'

What the AI did: The same person later wrote a first-person account: he asked Claude to build a spreadsheet of the CPT codes and what Medicare pays for each, then researched the flagged items.

Source: Business Insider (first-person essay) · 2026-02 · First-person essay published by a news outlet

Why this works

The problem: Hospital bills, especially for uninsured or self-pay patients, often arrive as vague lump sums that are hard to question.

How AI helps: A chatbot can explain billing codes, flag charges that Medicare bundling rules wouldn't allow, build a spreadsheet of codes and benchmark prices, and draft a firm dispute letter.

Tools & what they cost

Tool	Cost
Claude	Free option available (Paid upgrades exist, but the free version works for this) Free tier; paid plans available
ChatGPT	Free option available (Paid upgrades exist, but the free version works for this) Free tier; paid plans available
Medicare Physician Fee Schedule Look-Up (CMS) Official source to check what Medicare pays for a code	Free (No cost at all) Free

What do these labels mean?

Free No cost at all.
Free option available Paid upgrades exist, but the free version works for this.
Costs money You pay a set price or subscription.
Takes a cut of savings Charges a percentage of what it saves you.
Time · Difficulty Our estimates for a typical first try, not guarantees.
Reported What the linked source says happened, often self-reported. Your results will vary.

Watch out for

Chatbots can be wrong about billing rules. Check every flagged item against official sources before you send anything.
Medical records are sensitive. Redact identifiers, and consider whether you're comfortable uploading them at all.
Results depend on the hospital, your state and your insurance status. The reported outcome isn't typical or guaranteed.

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Sources

Last verified 2026-10-19. Not financial, legal, tax or medical advice. Disclaimer.