An internal medicine group asked us why one commercial payer had started paying them about 8 percent less in March than it had in February, with no notice they could find. We asked for the contract. It was a 2017 agreement that paid a percentage of the payer's "current fee schedule," and buried in the definitions was a sentence saying the payer could update that schedule with 30 days' notice posted to its provider portal. The notice had been posted. Nobody at the practice had a portal login that received notices. The contract permitted exactly what happened.
Payer contracts are dense, and most physicians and managers read the rate exhibit and sign. That is understandable and expensive. The rate is one number. The rest of the agreement decides how often that number changes, how long you have to bill, how far back the payer can reach to take money back, which products you are bound to accept and how hard it is to leave. This guide is payer contract terms explained the way we explain them in a practice meeting: what each clause does, how it shows up on your remits and what to ask for.
None of this is legal advice. A healthcare attorney should review any agreement before signature, and the terms below are the ones we would want that attorney to focus on. Our job is the operational side: knowing what you signed so the billing team can hold the payer to it.
Key takeaways
- The rate exhibit is one number; the definitions, amendment and recoupment sections determine whether that number holds.
- Lesser-of language means you are paid the lower of your charge or the contracted rate, so a charge master set below the contract rate loses money on every claim.
- A fee schedule tied to a percentage of "current" Medicare or a payer's own schedule moves whenever that reference moves, sometimes downward, with notice you may never see.
- Recoupment lookback periods, often 12 to 24 months for the payer and far shorter for you, are negotiable and are the clause most worth pushing on.
- Build a one-page contract summary per payer so the billing team can check remits against the terms without opening the agreement.
The compensation section: rate, reference and lesser-of
The compensation exhibit tells you what the payer pays. It is usually expressed one of three ways: a percentage of the Medicare physician fee schedule for a specified year, a percentage of the payer's own proprietary fee schedule, or a fixed schedule attached as an exhibit. Each has a trap. A percentage of "the current year Medicare fee schedule" changes every January when CMS updates the schedule; when Medicare rates fall, as they did in 2024 and 2025, your commercial rate falls with them unless the contract fixes the reference year. A percentage of the payer's own schedule is worse, because the payer controls the reference and can change it on notice. A fixed exhibit is the most stable and the hardest to get.
Almost every agreement contains lesser-of language: the payer pays the lesser of the billed charge or the contracted allowable. This is why charge master pricing matters even for in-network practices. If your charge for a code is $95 and the contract allows $110, you receive $95. We still find practices whose charges for some codes sit below their best contract rate, usually because the charge master was last updated years ago. Set every charge above your highest contracted rate and review it annually.
Look also for how the contract treats codes not on the schedule: new CPT codes, unlisted codes, drugs and supplies. "Payer's standard rate" for gap codes means whatever they decide. Ask for a defined methodology, such as a percentage of Medicare or of average sales price for drugs.
| Clause | What it does | How it shows up on remits | What to ask for |
|---|---|---|---|
| Fee schedule reference | Sets the base your percentage applies to | Allowed amounts shift in January without a contract amendment | A fixed reference year, or a floor below which rates cannot fall |
| Lesser-of | Pays the lower of charge or allowable | Allowed equals billed on codes where your charge is too low | Nothing; fix your charge master instead |
| Timely filing | Deadline to submit claims | CO-29 denials | At least 180 days, and the clock runs from primary EOB on secondaries |
| Recoupment lookback | How far back the payer can take money back | Offsets and takebacks on unrelated remits | 12 months or less, with written notice and appeal before offset |
| Amendment by notice | Lets the payer change terms unilaterally | Policy and rate changes with no signature | Mutual written amendment, or a right to terminate on a material change |
| All-products | Requires participation in every product the payer offers | Patients from plans you never agreed to, at rates you did not set | Product-by-product election |
Timely filing, claim submission and clean claim definitions
The timely filing clause sets how many days after the date of service the payer must receive the claim. Ninety days is common and is short; 180 days is reasonable; a year is generous. The clause should also say when the clock starts for secondary claims (from the primary payer's remittance, not the date of service) and for corrected claims. It should say what proof of timely submission the payer accepts.
The clean claim definition matters because it starts the payer's prompt payment clock. Most states have prompt pay laws requiring payment of clean claims within 30 to 45 days, with interest owed on late payments. The contract defines what "clean" means, and a broad definition that lets the payer call any claim it questions "not clean" defeats the state law in practice. Read it. Also check whether the contract requires electronic submission through a specific clearinghouse, which affects your costs.
Recoupment, offsets and audits
This is the clause we tell practices to fight hardest over. The recoupment section says how far back the payer can go to recover payments it later decides were wrong, how it notifies you and whether it can simply deduct the amount from future remits (an offset). Standard payer paper often allows 18 to 24 months of lookback for the payer, sometimes unlimited for "fraud," and gives the practice 90 to 180 days to dispute an underpayment. That asymmetry is negotiable, and several states cap payer recoupment periods by statute at 12 or 18 months for commercial plans.
Ask for a lookback no longer than the practice's own window to dispute payments, written notice with the claim-level detail before any recovery, a right to appeal before the money moves, and no offsets against unrelated claims without your written agreement. On remits, an offset appears as a negative line or an adjustment with a forward balance remark, and it is one of the hardest things for a billing team to reconcile. A contract that requires the payer to send a separate recoupment notice with the affected claim numbers saves your team hours every month.
The audit clause is the recoupment clause's partner. It sets how much notice you get for a records request, how many records they can ask for, whether extrapolation is allowed (taking a sample error rate and applying it to the whole population), and who pays for copying. Extrapolation is the term to look for; ask that findings be limited to the actual claims reviewed.
Amendments, products and termination
Amendment by notice is the clause that hit the internal medicine group. It allows the payer to change the agreement, including the fee schedule, by sending notice, with the practice deemed to accept if it does not object or terminate within a window. It is common and it is one-sided. The best version requires mutual written amendment for any compensation change. The acceptable version gives you a right to terminate without penalty within 60 or 90 days of a material change. Whichever you have, someone at the practice must receive the notices: register the practice manager and the billing lead, not just a physician, for every payer's portal notifications, and put "check payer notices" on the monthly close checklist.
All-products clauses require you to participate in every product the payer sells, including new ones, at the rates in the exhibit. When a payer launches a narrow-network exchange plan or a Medicare Advantage product with a lower schedule, you are in it. Ask for product-by-product election, and at minimum a right to opt out of new products. Related: check whether the contract lets the payer lease your rate to other networks, sometimes called a silent PPO or network rental clause. Patients arriving with a card from a plan you have never heard of, paying your contract rate, is what that looks like.
The termination section sets the notice period (90 to 180 days is typical), whether either side can terminate without cause, and what happens to patients in treatment. A long without-cause notice period protects the payer more than you. And note the term and renewal: many agreements auto-renew annually, which is convenient until you want to renegotiate and find the window closed. Calendar the renewal date and the notice deadline for each payer the day you sign, and revisit rates before it, which is the annual exercise our medical billing team runs with practices each fall.
Turning the contract into a one-page summary
The billing team should never have to open the agreement to know what the payer owes. For each payer, build a one-page summary: rate methodology and reference year, timely filing days and start point, clean claim definition, prompt pay days and interest, recoupment lookback and notice requirements, products included, amendment mechanism and where notices arrive, term and renewal date, provider representative contact. Keep it with the loaded fee schedule in the practice management system, and review both when a remit looks wrong. The internal medicine group's 8 percent question would have taken five minutes with that page in hand.
Questions we hear
We are a small practice. Will a payer actually negotiate any of this?
Rates are hard to move for a small group without bargaining power, but operational terms often are negotiable: the recoupment period, the timely filing window, notice requirements and product election. Payers have standard paper and standard exceptions. Ask for the exceptions in writing. Even a no is useful, because it tells you what to watch for.
The payer says our contract is "evergreen" and there is nothing to renegotiate. Is that true?
Evergreen means it auto-renews, not that it cannot be reopened. Most evergreen agreements allow either party to request renegotiation with notice, usually 90 to 180 days before the anniversary. Find the anniversary and the notice clause, and send the request in writing before the window closes.
How do we know if a payer is paying the contract rate?
Load the fee schedule into your practice management system's contract module and run an expected-versus-paid variance report on every remit. Without a loaded schedule you are trusting the payer's math, and in our experience every payer makes loading errors in January. If your system cannot do this, a periodic RCM audit can do it from the 835 files.
What to do this week
- Pull every payer agreement, including amendments, into one folder and note the term, renewal date and notice deadline for each.
- Build the one-page summary for your top five payers using the clause list above.
- Register the practice manager and billing lead for portal notices with every payer, and add a monthly notice check to the close.
- Compare your charge master against the highest contracted rate for your top 50 codes and raise any charge that sits below it.
- Flag the two agreements with the longest recoupment lookback and the broadest amendment-by-notice language for attorney review before their next renewal.
