This piece walks through those rules for outpatient mental health and substance use programs. It is general information, not legal or billing advice. Your CCO contracts can add terms of their own, so read them alongside the rules cited here.
Two clocks, not one
Oregon runs two very different filing deadlines depending on who is paying.
If the client is enrolled in a coordinated care organization or another managed care entity, OAR 410-141-3565 says initial claims go in no more than 120 days after the date of service. The rule also lets the plan and the provider negotiate terms within that window, which means your contract can be tighter than 120 days, but not looser.
If the client is on open card (fee-for-service OHP), OAR 410-120-1300 gives you 12 months from the date of service.
The trap is obvious once you see it. A biller who learned on open card thinks of a year as the deadline. If most of your OHP clients are in a CCO, then for most of your Medicaid volume the real number is four months. If your aging report only starts flagging claims at 90 or 180 days, it is built for the wrong clock.
When the CCO window stretches to 365 days
The same CCO rule allows initial claims up to 365 days after the date of service in a short list of situations:
- Pregnancy
- Eligibility problems such as retroactive enrollments or retroactive deletions
- Medicare is primary, except where the CCO is responsible for the Medicare payment
- Third party liability
- Other cases that delay the initial claim to the CCO
That last item has a carve-out worth taping to the front desk monitor. A delay caused by the provider failing to verify the member's eligibility does not count. If intake never checked coverage and you found out three months later, you are still on the 120-day clock.
Retroactive eligibility is the extension behavioral health programs use most. When a client applies for OHP during a residential or intensive outpatient stay and coverage comes back dated to admission, the longer window is what makes those early days billable. Keep the eligibility determination and your verification attempts in the file so you can show why the claim was late.
Corrections and appeals have their own window
Getting the first claim in on time is only half of it. For a timely claim that needs correcting, or that leads to a provider appeal under OAR 410-120-1560, OAR 410-141-3565 requires each CCO to set a resubmission period of at least 180 days after the initial adjudication date.
On open card, a claim filed within 12 months and then denied can be resubmitted within 18 months of the date of service under OAR 410-120-1300. You have to prove the original went in on time, using a remittance advice that shows it was submitted before it turned a year old, or a billing record or ledger showing submission dates. If your billing system purges old submission logs, fix that before you need them.
The fee-for-service rule also lists a few exceptions to the 12-month limit: an error by the Authority or the client's branch office (you then have six months from when the error is found, and the Division has to confirm it), a court or administrative law judge order, and a retroactive eligibility decision that lands more than 12 months after the date of service.
Medicare first, then OHP
For clients with both Medicare and Medicaid, the fee-for-service rule says the claim must reach Medicare within 12 months of the date of service to meet Oregon's timely filing rule. If it fails to cross over electronically, you submit it to the Division within six months of the date on the Medicare explanation of benefits, as long as Medicare was billed within the year. If you serve dual eligible clients, somebody on your team should own the crossover report rather than assuming it works.
What the CCO owes you
The rule runs both ways. Under OAR 410-141-3565, a CCO has to pay or deny at least 90 percent of valid claims within 30 days of receipt and at least 99 percent within 90 days. It can't require you to delay submitting claims, and it can't hold or deny payment because a copay wasn't collected at the visit.
One line matters a lot for community-based behavioral health. A CCO may not deny a behavioral health claim because the service was delivered in the member's home, unless it would deny a comparable physical health claim at the same site of service. If your in-home or mobile services are getting place-of-service denials, cite that subsection in the appeal.
Billing the client: usually no
This is where well-meaning programs get into real trouble. OAR 410-120-1280 starts from the position that a provider serving an OHP client may not seek payment from that client for Medicaid-covered services, except in the situations the rule spells out.
A few specifics catch outpatient programs again and again:
- No-show fees. You can't bill an OHP client for a missed appointment. The rule is explicit that a missed appointment is not a separate Medicaid service.
- Your own mistakes. If a claim is denied because of provider error, such as a missing prior authorization, missing documentation, or wrong codes, the client doesn't pay for it.
- The 90-day hold. After submitting a valid claim, you have to wait 90 calendar days before any billing or collection action against the client. If nothing has paid by then, you check eligibility for the date of service. If the client was eligible and you don't have a completed agreement to pay form, you can't bill them or send the account to collections.
When a client can agree to pay
The agreement to pay form (OHP 3165 for health services) is the gatekeeper. Under OAR 410-120-1280, before providing a non-covered service, or a covered service the client chooses to pay for privately, you have to tell the client in advance what the service is, whether OHP would cover it, and the estimated total cost. You document the date and time of that conversation in the record, note that the client had a chance to ask questions and consult their caseworker or representative, get the form signed, and give the client a copy.
The details are strict. A signed form is valid only if the estimated fee doesn't change and the service is scheduled within 30 days of the signature. It can't be moved to a different service, and it isn't valid as a blanket agreement to pay for unspecified services. For a client who chooses to privately pay for a covered service, you can't charge more than the payer would have paid, and you can't then submit a claim for that same service. If the client has limited English proficiency, is deaf, or is hard of hearing, you provide translation or interpretation before they sign.
The generic "I agree to pay anything insurance doesn't cover" paragraph in many intake packets doesn't satisfy any of that for OHP clients.
A short checklist for this quarter
- Set CCO claims to flag at day 60 and escalate at day 90, so nothing reaches day 120 by accident. Check each CCO contract for a shorter negotiated window.
- Verify eligibility and CCO assignment before every first visit and on a regular schedule for ongoing clients, and keep proof. Missing that step forfeits the 365-day extension.
- Keep submission records and remittance advice long enough to prove timely filing on resubmissions.
- Put the 180-day correction window and the 18-month open card resubmission limit on your denial work queue.
- Pull no-show fees for OHP clients out of your financial policy and your practice management system.
- Replace blanket financial responsibility language with service-specific OHP 3165 forms, dated, priced, and scheduled within 30 days.
- Hold client statements for OHP members until 90 days after a valid claim, then verify eligibility before anything goes out.
None of this is glamorous, but it is often the difference between a Medicaid line that pays and one that quietly writes off a few percent every month.
If you want a second set of eyes on your OHP billing workflow, Saint Health Group helps Oregon behavioral health programs with revenue cycle and compliance work.
Easton Hallock is Managing Partner at Saint Health Group.
