Therapy Session Bill Explained
Therapy session bills can be surprisingly confusing, even when you expected the charge. Between CPT codes like 90834 and 90837, varying copay amounts, and out-of-network adjustments, it is easy to feel lost. This guide helps you understand what each line on your therapy bill means and what steps to take if something looks off.
This guide is general educational information, not professional advice. If the document involves a serious deadline, lawsuit, tax issue, health decision, or major financial consequence, get qualified help.
What this document usually means
A therapy session bill is a statement showing the cost of one or more psychotherapy appointments. It typically lists the date of each session, the type of therapy provided (identified by a CPT code), the provider's full charge, what insurance paid, and what you owe.
The most common CPT codes are 90834 for a 45-minute session and 90837 for a 60-minute session. You may also see 90791 for an initial intake evaluation. The billed amount is often higher than what insurance allows, and the difference is usually written off by the provider if they are in-network.
The first things to check
Start by confirming the dates of service match your actual appointments. Then check whether your therapist is listed as in-network or out-of-network, because that dramatically changes what you owe. Look at the allowed amount versus the billed amount to see if the insurance adjustment was applied.
Verify that your copay or coinsurance matches what your plan summary says for mental health visits. If you have already paid a copay at the time of the visit, make sure that payment is reflected on the bill so you are not being double-charged.
Common reasons this letter feels confusing
Therapy bills often use numeric CPT codes without explaining what they mean in plain language. The difference between a 90834 and a 90837 is just session length, but it can change the allowed amount significantly. Bills may also combine multiple sessions on one statement, making it hard to match each line to a specific visit.
Another common source of confusion is when insurance applies the charge toward your deductible instead of paying it. The bill shows no insurance payment, which looks like a denial, but it actually means your deductible has not been met yet.
What to do before you pay or respond
Compare the bill to your Explanation of Benefits from your insurance company. The EOB will show what the plan allowed, what they paid, and what they say you owe. If the bill and EOB do not match, call the billing office before paying.
If you believe the charge is wrong, ask for an itemized statement that shows the CPT code, session length, and provider credentials. You have the right to dispute charges that do not match the services you received. If your insurance denied the claim, check whether you need a referral or prior authorization for mental health services under your plan.
How Letter Lens can help
Upload your therapy bill to Letter Lens and get a plain-English breakdown of every charge, code, and adjustment. Letter Lens identifies the CPT codes, translates them into everyday language, highlights the amount you actually owe versus what was written off, and flags anything that looks unusual. It is not a substitute for your insurance company or a billing advocate, but it gives you a clear starting point before making calls or payments.
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