Direct Answer: PEBB and SEBB open enrollment runs October 26 to November 23, 2026. Uniform Dental Plan is a PPO. DeltaCare and Willamette are managed care plans that assign you to a contracted clinic.
If you work for a Washington state agency, a public school district, or a public college, you have a short window this fall to pick a dental plan. And the plan you pick quietly decides which dentists you can walk into starting January 1.
The Washington State Health Care Authority lists PEBB and SEBB open enrollment as October 26 through November 23, 2026, with three dental choices: the Uniform Dental Plan, DeltaCare, and Willamette Dental. Two of those three carry a familiar carrier name, which is exactly why people get tripped up.
I take these calls every fall here in Renton. Below is what I wish every subscriber knew before they clicked submit, including how to handle treatment that is already halfway finished.
The Three PEBB and SEBB Dental Options, in Plain Terms
All three plans are real dental coverage. They just hand you very different amounts of control over who treats you.
- Uniform Dental Plan is a PPO administered by Delta Dental of Washington. You choose your own dentist, and the plan pays at one level for contracted offices and a lower level for others.
- DeltaCare is a managed care plan from that same carrier. Your care is tied to a contracted provider or group you are assigned to.
- Willamette Dental is also managed care. Care is delivered through the plan’s own network of offices.
The name on the card matters far less than the plan design sitting behind it. I have had people tell me on the phone that they “have Delta,” and that is true, but one of those Delta products lets them see us and one generally does not.
You can confirm the window and the current plan lineup yourself on the Washington State Health Care Authority’s dental plan comparison page. I would read that page before you read any plan brochure.
PPO vs. Managed Care: The Real Question Is Who You Get to See
Forget the insurance vocabulary for a minute. The practical difference is whether you pick the dentist or the plan picks for you.
A PPO lets you choose. You get a higher benefit at offices contracted with the plan and a reduced benefit elsewhere, but coverage does not vanish if you step outside the network.
A managed care plan assigns your care to a contracted clinic or group. Outside that clinic, these plans generally pay nothing except in a true emergency.
Here is the one thing to check on your enrollment screen before you submit: does this plan assign me to a provider, or do I get to name one? If the enrollment flow asks you to select an assigned clinic from a list, that is managed care.
I get a version of this message every month. One person wrote in this summer saying their dentist had just gone out of network with their carrier and they needed to find somewhere new. That is a frustrating thing to discover in February. It is a five minute thing to prevent in November.
It is completely reasonable to call a dental office during the enrollment window and ask which of the three PEBB plans they contract with. We answer that question dozens of times a week and nobody is annoyed by it.
How the Three Plan Designs Compare
This is a general comparison of how each plan design behaves. Benefit levels change year to year, so treat the plan booklet as the final word.
| Plan option | Plan design | How you choose a dentist | Benefit outside the network |
|---|---|---|---|
| Uniform Dental Plan | PPO administered by Delta Dental of Washington | You pick any licensed dentist; benefits are higher at contracted offices | Yes, typically at a reduced level |
| DeltaCare | Managed care, same carrier | Care is tied to a contracted provider or group you are assigned to | Generally none outside of emergencies |
| Willamette Dental | Managed care, delivered through the plan’s own offices | You are seen at the plan’s locations | Generally none outside of emergencies |
The Five Minute Call That Settles It
Before November 23, call the plan and ask these five questions. Write the answers down, because a plan representative’s verbal answer is easier to act on when you have it in your own notes.
If Treatment Is Already in Progress, Read This Part Twice
Nobody explains this during enrollment, so I will. Dental work often spans months, and a plan change on January 1 can land right in the middle of it.
Common examples I see in Renton every winter:
- A crown done across two appointments, with the prep in December and the seat in January.
- Scaling and root planing split by quadrant over several visits.
- An implant staged across months, sometimes with a bone graft and healing time built in.
- Clear aligner treatment that runs across two benefit years.
The plan that approved the first half is not the plan paying for the second. Frequency limits, annual maximums, and waiting periods all reset differently depending on the design you move to.
One person reached out recently asking about crowns for recently placed implants and, in the same message, how the annual maximum would apply. That is exactly the right instinct. The sequence and the coverage are one conversation, not two.
The honest move is to ask your office to map your remaining treatment against both the old plan and the plan you are considering, before November 23. We do this with a printed sequence and a written estimate. If you want the background on why January timing matters, your dental benefits reset in January walks through how that reset actually works.
What Your Plan Choice Does Not Change
The dentistry itself does not change based on which card you hand the front desk. A crown is a crown. A deep cleaning is a deep cleaning. What changes is who performs it, how quickly you can get in, and how much of the bill lands on you.
Be realistic about the out of network picture in South King County. Dental networks have been in motion, and recent industry surveys from the American Dental Association’s research arm found a meaningful share of dentists planning to step out of at least some insurance networks, citing reimbursement and overhead.
So a plan that looks rich on paper can still leave you out of network with the office you actually wanted. We cover that shift in more detail in what happened when more dentists left PPO networks in 2026.
On cost, I will not quote you a number in an article. What moves your out of pocket is the plan design, the annual maximum, the frequency limits, and whether the office is contracted. Those four levers explain almost every surprise I have ever had to walk a patient through.
If you want a dollar figure, ask an office to run a benefits check from your group number and member ID and give you a written estimate. That takes a phone call. Reversing an enrollment choice in February does not.
One Note on Specialty Care
Plan design matters more once specialty work enters the picture, because managed care plans and some PPOs route you to outside specialists on their own referral rules and timelines.
We keep a board-certified periodontist, Dr. Jaewon Kim, and an in-house endodontist, Dr. Joe Dutner, in the same office as Dr. Susan Chu’s general and cosmetic care. That means gum surgery, bone grafting, and root canal therapy can sit inside one treatment plan and one estimate instead of three offices and three separate claims.
Worth considering as you compare the three options, especially if you already know periodontal or endodontic work is on your horizon.
How This Differs From a General Card Explainer
We have a separate piece on what a PPO, DHMO, or Apple Health card controls in Washington. That one explains card mechanics year round, for anyone with any plan.
This article is narrower on purpose. It is strictly about the PEBB and SEBB choice between three named plans inside a dated fall window, and the decisions that window forces.
If you want a script for the benefits call itself, how to check what your dental plan will pay before you sit in the chair gives you the questions in order.
Frequently Asked Questions About PEBB and SEBB Dental Enrollment
When exactly does PEBB and SEBB open enrollment close?
The Health Care Authority lists the window as October 26 through November 23, 2026. Changes take effect January 1. After the window closes, you generally need a qualifying life event to switch.
Two of the plans say Delta Dental. Are they the same coverage?
No. The Uniform Dental Plan is a PPO administered by Delta Dental of Washington, and DeltaCare is a managed care plan from the same carrier. The carrier name is identical; the way you choose a dentist is not.
Can I call a dental office and ask which PEBB plan they take before I enroll?
Yes, and I would encourage it. Insurance acceptance is the single most common question on our phone line, and nobody at a front desk thinks it is a strange thing to ask in November.
I started a treatment plan this year. Will switching plans mess it up?
It does not stop the treatment, but it can change what gets paid. Annual maximums reset, frequency limits may count differently, and some plans apply waiting periods to major work. Ask your office to lay the remaining appointments against both plans before you enroll.
What should I have in front of me when I call the plan?
Your group number and member ID. With those two things, most offices can run a benefits check, and the plan can confirm whether the design is PPO or managed care, what the annual maximum is, and whether major work carries a wait.
Does picking a PPO guarantee my current dentist is in network?
No. Networks shift, and a dentist contracted this year may not be next year. Confirm directly with the office rather than relying only on an online directory, which can lag behind actual contract changes.
Want a Benefits Check Before the Window Closes?
If you are weighing the three PEBB or SEBB dental options and want to know how each one would handle work you already have planned, we are happy to run a benefits check from your group number and member ID. Cedar Dental Group is in Renton and sees patients from Tukwila, Kent, Burien, Newcastle, and across South King County. You can reach us at 425-430-0400 or at cedardentalgroup.com to ask a coverage question or set up a consultation.
