Dispute with receipts
The best evidence is the payer's own file.
An underpayment dispute turns on one question: what did the plan agree to pay? The answer isn't yours to assert — the payer already published it. Each row of our corpus is that attestation, carrying the date it was filed.
What evidence looks like
A number they filed, not a number you claim.
A dispute built on your own spreadsheet is an argument. A dispute built on the payer's own published rate is a receipt. The corpus is made entirely of the second kind.
- Each row is the payer's own in-network attestation — their disclosure, not our inference.
- Every figure carries a file date, so it proves what was on the record and when.
- It's matched to a real insurer and network, so the exhibit names an entity the payer recognizes.
- Payer
- Highmark Blue Shield of Northeastern New York
- Billing code
- 90837 · Individual psychotherapy, 60 min
- Published in-network median
- $137.80
- As of
- Jul 13, 2026
- Source
- Payer machine-readable file · Transparency in Coverage
Built from the aggregate published median across New York books — the shape of an exhibit, not a specific claim. On Leuk, the exact plan × provider × code figure appears privately to the clinician.
Why it holds up in New York
Matched to the regulator's own registry.
Payer files name the same company a dozen different ways. Name-matching guesses; we don't. Every rate is matched to a real insurer drawn from the New York Department of Financial Services list — so an exhibit names the licensed entity, not a string that happened to match.
- 48
- Insurers
- 72
- Networks
- 150K+
- Plan filings
From the NY DFS registry
Across New York payer books
DOL Form 5500 — the plan and its sponsor
Build the case
Start from the payer's own number.
Tell us what you're seeing on underpayments, and we'll show you how the corpus turns a plan's own file into evidence.
One argument, three moves
Know your rates. Negotiate from evidence. Dispute with receipts.
Every number on these pages is the payer's own published attestation — the same corpus, seen three ways.
Know your rates
The rate corpus
The live data itself — millions of payer-published in-network rates across New York, dated.
Negotiate from evidence
Payer negotiation
Your payer mix beside the market median — the number you can't argue without seeing.
- You’re here
Dispute with receipts
Underpayment disputes
The strongest evidence in a dispute is the payer's own published attestation.