About This Tool

Who we are

Lower My Medical Bills is an independent, self-funded project — not a hospital, insurer, law firm, or debt-collection company. We have no financial relationship with any provider or health plan, so our guidance is written to serve the patient reading it, not to steer you toward a particular company.

Our work is organized and maintained by the Lower My Medical Bills editorial team. Rather than publishing opinions, we translate the rules that already govern medical billing and claims into plain-English steps. Every guide is built from public, primary sources — including CMS billing guidance, the AMA CPT code set, NUBC and NUCC claim-form instructions, and the standard X12 835 adjustment and remark codes — and each guide links the sources it draws on. See our editorial policy and sources & methodology for how this content is researched, reviewed, and updated.

The project is funded in part through clearly labeled affiliate links, disclosed on our affiliate disclosure page. Affiliate relationships never change which issues the tool flags or what the guidance recommends.

Who this is for

This tool is for people who received an Explanation of Benefits (EOB) from their insurer and want to understand whether it was processed correctly — and what to do if it wasn't. You don't need to know billing codes or insurance jargon. You need a document and a few minutes.

Common situations where this helps:

• A bill arrived that seems higher than expected after insurance paid its share
• A claim was denied and you're not sure why or whether to appeal
• You had a large event (surgery, ER visit, childbirth) and are sorting through multiple bills
• You want to verify your deductible, out-of-pocket maximum, or coinsurance was applied correctly
• You received an out-of-network bill after receiving care at an in-network facility

How the review works

When you upload an EOB, the tool parses the document and checks it against a curated set of common billing error patterns. Here is what that process evaluates:

1. Service and code validation — CPT and HCPCS codes are checked against the service type, setting, and date to surface known patterns for upcoding, unbundling, or duplicate billing.
2. In-network and out-of-network classification — Provider network status is evaluated against claim processing flags to identify possible surprise billing scenarios or misclassification.
3. Benefits accumulator check — Deductible and out-of-pocket maximum figures are checked for consistency across claims to flag potential accumulation errors.
4. Denial code interpretation — Remittance advice remark codes (RARCs) and claim adjustment reason codes (CARCs) are mapped to plain-English explanations and the most common appeal pathways.
5. Patient responsibility review— The member's share of each line item is assessed relative to standard cost-sharing rules to flag possible overpayment.

Results are organized into a ranked Claim Signal Queue, paired with a Verification Checklist of specific items to confirm before making calls, and an Appeal Prep Path when escalation looks warranted.

What this tool cannot determine

Data and privacy

Uploaded files are used to run the analysis and return results to you. Files are processed for the active request and are not retained for any other purpose. No account is required and no personal health data is linked to your identity on this site.

For full details see the Privacy Policy.

Sources and grounding

Billing error patterns are grounded in publicly available references including CMS billing guidelines, the AMA CPT code set, NUBC and NUCC claim form instructions, and published insurer processing manuals. The denial code library references the standard X12 835 transaction set (CARCs and RARCs). This guidance is compiled and maintained by the Lower My Medical Bills editorial team and updated periodically as billing rules and patterns evolve.