Your Prior Auth Approval Has an Expiry Date. Is Anyone on Your Team Watching the Clock?
Getting a provisional affirmation feels like the finish line. It's the starting gun. Between the decision letter and the claim sits a validity window, a 14-character tracking number and a queue most suppliers manage in a spreadsheet.
Starts tomorrow, October 28, 2026: Medicare prior authorization goes nationwide for K0005 (manual wheelchair), E0194 (pressure reducing support surface), L0456, L0457 and L0486. L1833 returned to the Required Prior Authorization List on October 26. Any claim for these codes that reaches the DME MAC without a decision and a matching UTN is denied automatically.
The approval is not the hard part anymore
Most of the prior authorization advice written for DME suppliers is about getting the request in clean. Fair enough. A thin clinical note or an unsigned order will bounce a prior authorization request (PAR) every time. But once the request clears, a different set of problems starts, and they get far less attention.
Picture a Tuesday. Your intake coordinator sends a PAR for a pressure reducing support surface on Monday. Medicare has five business days to answer, and the decision comes back affirmed on Thursday. The letter lands in a shared fax inbox. Someone files it. The patient is still in a skilled nursing stay, so delivery waits. Five weeks later the surface ships, the claim goes out, and it denies. The provisional affirmation for that item category is good for one month.
Nobody made a mistake in the usual sense. The documentation was fine. The order was fine. The approval just expired while the file sat in a folder.
"A prior authorization decision is a promise with a shelf life. Most intake queues track the request and forget the shelf life."
What the CMS operational guide actually says
The numbers below come straight from the CMS Operational Guide for DMEPOS prior authorization. They're worth pinning above your intake desk, because several of them are shorter than people assume.
Validity differs by category. Power mobility devices and manual wheelchairs get six months. Lower limb prosthetics get 120 calendar days. Orthoses and pneumatic compression devices get 60 days. Support surfaces get one month. A supplier that sells across those categories is running four different clocks, and the clock for the cheapest-looking item is the shortest.
Where the queue breaks
When we talk to intake teams about how they track open PARs, the answer is usually a shared spreadsheet, a whiteboard, or the memory of the one person who has done this for nine years. That works at 15 requests a week. It stops working the week a new code set goes live and volume doubles.
The failures cluster in the same few places:
| Queue state | What goes wrong | What the claim looks like | Risk level |
|---|---|---|---|
| PAR submitted, no decision yet | Nobody notices day 6. The request sits unanswered because the fax confirmation never matched | Delivery delayed, patient calls the referral source | Moderate |
| Non-affirmed (incomplete PAR) | The letter lists missing documents. It gets filed instead of worked, and the PAR is never resubmitted | Item ships anyway and the claim denies. Redetermination can take up to 60 days | High |
| Affirmed, awaiting delivery | Validity window runs out before the item ships | UTN is stale, claim denies with the approval attached | High |
| Affirmed and delivered | UTN typed with one character wrong, or left off the second claim in a series | Automatic denial for missing or mismatched UTN | High |
| Resubmitted after non-affirmation | Old UTN stays on the order record and the new one never replaces it | Claim carries the non-affirmed UTN | Moderate |
Every row on that table is a clerical failure, not a clinical one. The patient qualified. The physician signed. The money is lost anyway because a number or a date got away from the team.
What a lost approval costs
A non-affirmation is cheap compared to what comes after it. Resubmissions aren't capped and a new decision is due in five business days, so the fast fix is always available. The expensive path is the one where the supplier delivers anyway and bills with the non-affirmed UTN. The claim denies, and the only way back is a redetermination appeal, which the DME MAC has up to 60 days to decide.
For a power wheelchair, a custom orthosis or a support surface, that's a large unpaid claim sitting for two months with the equipment already in the patient's home. Multiply it by a few a month and you have a cash flow problem that looks like a denial problem on the report.
The life of a PAR, with the dates that matter
It helps to see the sequence as a set of clocks rather than a set of tasks. Each stage has its own deadline, and only the first one is on a payer's side.
The first box gets all the attention. The third one is where suppliers lose approvals, and it's where a simple tracking field pays for itself: an expiry date calculated the moment the decision letter is read, visible to whoever schedules delivery.
Three habits that keep the queue honest
1. Treat the decision letter as a document that needs indexing
Decision letters come by fax, mail, esMD or the portal. If the UTN and decision date live only in a scanned PDF, someone has to open it to find them. Pull the UTN, the decision, the HCPCS code and the validity end date into fields on the patient record the day the letter arrives. Then the delivery team can see the deadline without opening anything.
2. Work non-affirmations like open tasks
A non-affirmed decision is an incomplete request, and the letter names exactly what is missing. That's an unusually helpful denial. Assign it to a person, set a same-day target, and resubmit. The old UTN should be retired on the record so it can't end up on a claim by habit.
3. Check the UTN before the claim leaves, not after
Compare the UTN on the claim to the one on the decision letter, confirm the HCPCS code matches the approved item, and confirm the date of service falls inside the validity window. For a series of claims, check that each one carries the number. It's a two-minute check, and it is the last point at which a problem costs nothing.
"You don't lose these approvals in a payer's office. You lose them in the gap between the decision letter and the delivery ticket."
A pre-delivery checklist for PA-required items
What to do this week
With a new set of codes live tomorrow, your open queue is about to get longer. A short audit now saves a long cleanup later. Pull every PAR you've submitted in the last 60 days and sort it by status. Look for affirmed requests with no delivery date, non-affirmed requests with no resubmission, and anything where the validity window ends within the next two weeks. Those are the dollars at risk today.
Then decide where the UTN and the expiry date will live. If the answer is "in the PDF," that's the fix to make first.
Stop letting approved orders turn into denied claims
DocuFindr reads decision letters, pulls the UTN and validity dates into your workflow, and flags approvals that are about to expire. Our team can show you what that looks like on your own intake queue.