Aetna Senior Supplemental Payer ID: AESSI vs 62118

Front desk staff pull up Aetna Senior Supplemental Insurance and see two different numbers depending on which system they're in. Both are correct. Which one to use depends on whether you're checking eligibility, submitting a claim, or setting up electronic remittance. Getting the aetna senior supplemental payer id wrong is one of the more common reasons a claim bounces back at a small practice, so here is exactly which number goes where and who to call when the portal disagrees with your clearinghouse.

Aetna Senior Supplemental Insurance (Aetna SSI) uses two different payer IDs depending on the transaction. For real-time eligibility checks, benefit inquiries, and claim status lookups submitted through the Aetna SSI provider system, the payer ID is AESSI. For electronic claims submission through a clearinghouse and for ERA/EFT enrollment, the payer ID is 62118. Some clearinghouses list 62118 as non-par and restrict it to ERA delivery only, so a front desk should confirm with its own clearinghouse before assuming a claim will go through under that number.

Aetna Senior Supplemental Insurance is a supplemental product that pays after Medicare processes the primary claim, not a Medicare Supplement policy sold directly by Medicare itself. A practice verifying benefits can call (888) 834.3511 or (888) 686.3260, or run the check through its clearinghouse using the correct ID for the transaction type.

Aetna SSI is not the same payer record as regular Aetna medical or Aetna dental. It needs its own line in your practice management software, set up with the right ID for the transaction you're running. Load AESSI for eligibility and claim status lookups done through the Aetna SSI provider system. Load 62118 for electronic claims and for ERA/EFT enrollment through a clearinghouse. Mixing the two, or assuming one ID covers both jobs, is how a clean eligibility check turns into a rejected claim two weeks later.

For the plan mechanics, how the Medicare crossover works, and what a front desk actually confirms before a visit, we cover it step by step in our guide to Aetna Senior Supplemental Insurance at the front desk.

Think of it as two doors into the same payer. AESSI is the door for looking something up: is this patient covered, what's the benefit, what happened to a claim already filed. 62118 is the door for sending something in: an electronic claim, or an enrollment form for electronic remittance and direct deposit. A practice that only ever checks eligibility may never need 62118 at all. A practice that bills electronically will need both, entered correctly in two different places in the software.

If your clearinghouse rejects a claim under 62118 with a non-par flag, that usually means the clearinghouse has that ID marked for ERA delivery only, not for claim submission. Call your clearinghouse support line first. It's a setup issue on their end, not a coverage problem with the patient.

Most Aetna SSI claims follow Medicare first. You submit to Medicare, Medicare processes the primary liability, and the secondary claim either crosses over automatically or gets submitted separately using payer ID 62118 depending on how your clearinghouse is set up. If you're mailing a paper claim, the correct address is printed on the remittance advice Aetna SSI sends with the primary Medicare EOB, since Aetna SSI uses a few different processing addresses depending on the plan and the state. When in doubt, call the provider line at (888) 834.3511 or (888) 837.2951 and ask for the mailing address tied to that specific member's plan.

With Valian's insurance verification, you sign in and check any patient in one click, in under a second, whether the payer is Aetna Senior Supplemental Insurance or any other plan loaded in the system. Nothing runs on a schedule by itself. Only the Full System runs eligibility checks automatically before every appointment; on its own, insurance verification runs the moment someone at the front desk clicks to check a patient. Insurance verification: the first month is free, and on day 30 the card on file is charged $500 unless the practice cancels. Checks cost $2.50 each after that.

You can look up Aetna Senior Supplemental Insurance and the other payers we verify in real time in our payer directory before you decide how to route a check. For the general steps behind any eligibility lookup, see our guide on how to check patient insurance eligibility, and for what a same-day check actually requires from your software, see real time insurance verification.

The ADA Health Policy Institute 2026 survey found that 43.3% of dentists use AI for at least one task, and insurance verification is the number two planned use, at 32.6% planned versus 13.6% current. That gap is the work still done by hand: looking up the right payer ID, calling the number on the card, and writing down what a rep says over the phone.

Run the arithmetic on your own volume. If your front desk verifies 20 patients a day and each call or portal lookup takes 8 minutes, that is 160 minutes, over two and a half hours, spent on hold or clicking through a payer's site every single day. Plug in your own patient count and your own average call length and see what a full week adds up to.

If you want to see how a one-click check runs at your own front desk, you can book a short walkthrough and bring a few real patients from your schedule to test it on.

Is Aetna Senior Supplemental a Medicare Supplement?

No. Aetna Senior Supplemental Insurance is a supplemental product that pays secondary to Medicare, but it is marketed and administered separately from the standard Medicare Supplement (Medigap) plans sold under Aetna's regular Medicare business. Treat it as its own payer with its own ID, not as a Medigap plan.

Where to send Aetna senior supplemental claims?

Most claims process after Medicare, either through automatic crossover or submitted separately using payer ID 62118 through your clearinghouse. For a paper claim, the exact mailing address is printed on the remittance advice Aetna SSI sends with the primary Medicare EOB, since it varies by plan and state. Call (888) 834.3511 to confirm the address for a specific member if you don't have that remittance in hand.

How to verify Aetna senior supplemental insurance?

Use payer ID AESSI to run an eligibility or benefit check through the Aetna SSI provider system, or call (888) 686.3260. If your practice management software supports electronic eligibility checks, sign in and check any patient in one click rather than calling.

How do I check my Aetna senior supplemental claim status?

Claim status inquiries also use payer ID AESSI through the provider system. You can also call (888) 837.2951 or (888) 686.3260 and reference the claim number and the date of service to get a status update over the phone.