Once you have the itemized bill, check it line by line. Billing and coding errors are common, and they almost always run in the provider’s favor. This letter lists the specific lines you’re disputing and asks for a corrected bill — with collection activity paused while they review.
Common errors to look for
- Duplicate charges — the same service or item billed twice.
- Services not received — a procedure, test, or medication that never happened.
- Wrong quantity / units — billed for more days, doses, or units than you got.
- Upcoding — a more expensive code than the service provided (e.g. a routine visit billed as complex).
- Unbundling — charging separately for items that should be a single bundled code.
- Wrong patient or date, or charges after you were discharged.
The letter
[Your full name]
[Your address]
[City, State ZIP]
[Phone] | [Email]
[Date]
[Hospital / Provider billing department]
[Billing address]
Re: Dispute of specific charges - request for corrected bill
Patient: [Patient full name, date of birth]
Account / Statement number: [number]
Date(s) of service: [dates]
To the billing department:
After reviewing the itemized statement for this account, I am disputing the
following charge(s) as inaccurate:
1. [Date] - Code [CPT/HCPCS] - "[description]" - $[amount]
Reason: [e.g. billed twice / service not received / wrong quantity]
2. [Date] - Code [CPT/HCPCS] - "[description]" - $[amount]
Reason: [reason]
Please review these line items, correct any errors, and send me a corrected
itemized statement. If you believe a disputed charge is accurate, please send
the documentation supporting it (for example, the medical record or order for
that service).
Because this account is in active dispute, please place a hold on collection
activity and on any further interest or late fees for the disputed amount until
the review is complete. I intend to pay any amount that is correctly owed once
the bill is accurate.
Thank you for your help correcting this.
Sincerely,
[Your signature]
[Your printed name]
How to send it
Send by certified mail with return receipt (or your portal’s secure message if it logs a record), and keep a dated copy plus the itemized bill you marked up. If the provider used a separate billing company, send it there; if the debt is already with a collector, use the debt-validation letter instead.
Notes. Disputing line items with the provider is different from a credit-bureau dispute and from an insurance appeal — if insurance processed the claim wrong, also see appealing a denied claim. Keep your tone factual and specific; “this code was billed twice on [date]” gets corrected faster than “this bill is too high.” This is general information, not legal advice.