Washington Opioid Treatment Program License: What DOH Requires in 2026

Washington does not issue a methadone clinic license. It licenses the organization as a behavioral health agency and certifies it as an opioid treatment program, and it will not do either until three other bodies have signed off. That sequencing, plus a siting statute with its own consultation duty, is what makes a Washington OTP slower to open than an outpatient clinic down the street. This guide covers the state layer in full. For the federal path that applies in every state, see our guide to how to open a methadone clinic; for the Oregon counterpart, see opening a methadone clinic in Oregon.

What approvals does a Washington OTP need before it can dispense?

The Washington State Department of Health (DOH) licenses OTPs under chapter 71.24 RCW and the behavioral health agency rules in chapter 246-341 WAC. WAC 246-341-0300 is direct about the order of operations: before an opioid treatment program license is issued, the applicant must obtain approval from the Pharmacy Quality Assurance Commission, from SAMHSA under 42 CFR Part 8, and from the DEA. The state license is the last approval, not the first.

Two points surprise operators coming from other states. First, the State Opioid Treatment Authority sits at the Health Care Authority, the Medicaid agency, while licensing sits at DOH, so there are two state agencies in the file from day one. Second, the licensing rules incorporate the federal standards by reference: WAC 246-341-1000 requires compliance with 21 CFR Parts 1300, 1301, 1304 and 1306 and with 42 CFR Part 8 as of April 2024, so a federal deficiency is also a state deficiency.

What does the DOH application ask for that other agencies do not?

Most of the DOH application is the same behavioral health agency package any Washington program files, covered in our Washington BHA licensing guide. WAC 246-341-0300(5) adds three OTP-only items:

• County communication. Documentation that the applicant has communicated with the county legislative authority about land use compliance.
• Community relations plan. A plan developed and completed in consultation with the county, city or tribal authority. DOH posts it on its Proposed OTPs page and gives public notice to local media that a facility is proposed.
• Out-of-state history. An applicant that operates OTPs in another state submits copies of every review report from its national accreditation body and any state certification in the past six years.

DOH does not issue a new or amended license until the application is complete and it has approved the agency's policies and procedures, and the license and OTP certification run for up to 12 months before renewal. The community relations plan is not a one-time filing: WAC 246-341-1000(14) requires an ongoing plan that addresses new community concerns after opening, and DOH's medication unit guidance expects the same plan to document outreach at each new site.

How does siting work under RCW 71.24.590?

RCW 71.24.590 is the statute that decides where a Washington OTP can go, and it cuts both ways. Before acting on an application, DOH must consult the county and city legislative authorities where the program would sit, and it may license only programs that comply with local land use ordinances. It weighs the population in need, nearby certified programs, transportation access and the applicant's demonstrated ability to serve patients, and it must not discriminate based on the applicant's corporate structure.

The protections for applicants are just as specific. A county or city may require a conditional use permit with reasonable conditions only if it imposes the same requirement on other essential public facilities and health care settings, and local plans cannot preclude the siting of essential public facilities. The statute states that no city or county legislative authority may impose a maximum capacity for an opioid treatment program. An applicant that is denied licensing, certification or a state contract is entitled to written reasons. In our experience the land use conversation is where OTP timelines are won or lost, so it belongs at the start of the project, alongside the zoning and site selection work, not after the lease is signed.

What do the certification standards in WAC 246-341-1000 add?

WAC 246-341-1000 was rewritten effective January 31, 2025 to align with the 2024 federal rule. Beyond incorporating the federal standards, it adds Washington-specific duties a surveyor will check:

• An after-hours dose line. A way to confirm a patient's dose amount seven days a week, 24 hours a day.
• Drug testing procedures. Documented need for additional urinalysis, observed samples when clinically indicated, and chain of custody.
• Central registry use. The state central registry must be used for emergencies, dual enrollment checks and required data.
• Health offers at admission. Hepatitis A and B vaccination, and screening and treatment for HIV, hepatitis B and C, syphilis and tuberculosis, on site or by referral.
• Overdose reversal medication. Information about and access to it under RCW 71.24.594, and at least one staff member on duty at all times with documented CPR and overdose management training.
• Medical director reviews. Documented review of prescription drug monitoring program data at admission, annually and after incidents of concern, and an approved withdrawal management schedule for every person admitted to withdrawal management or administratively discharged.
• Notifications. SAMHSA and DOH within three weeks of any change in program status, program sponsor or medical director; a patient death off campus reported to DOH within 48 hours; a death on campus reported as a critical incident.

Take-home exceptions beyond the federal schedule need approval from both the State Opioid Treatment Authority and SAMHSA. The federal schedule itself, under 42 CFR 8.12, allows up to 7 take-home days during the first 14 days of treatment, up to 14 days from day 15, and up to 28 days from day 31, at the practitioner's discretion and after weighing the diversion and safety criteria in the rule.

What changed in 2025, and what is in the 2026 rulemakings?

DOH keeps its behavioral health agency rules in progress on one page. As of October 2026 it lists three OTP projects and two broader ones that reach OTPs.

The accreditation fee is the one to watch. DOH describes itself as the only state agency in the country that is an active SAMHSA-approved accreditation body, and its December 2024 accreditation fact sheet says it accredited 28 of the state's 39 licensed OTPs at no charge. The same document explains why that is ending: the department found it lacked authority to use licensing fees for accreditation work, its SAMHSA approval runs through January 2028, and the alternative for operators would be a private body at roughly $4,000 per survey day, three to five days per survey, every one to three years. SB 5988 settled the authority question; the rulemaking now sets the amount. Budget for a fee from 2027 either way, and if your program is choosing an accreditor for the first time, our CARF versus Joint Commission comparison covers the private options.

How do fixed-site and mobile medication units get approved?

A medication unit is a dispensing site run as part of a licensed OTP. The Health Care Authority's December 2025 fact sheet counts 43 OTPs serving about 20,000 Washingtonians, 16 mobile medication units and one fixed-site unit, with more expected in 2026. DOH's fixed-site medication unit page sets out the order:

1. Obtain a drug other controlled substance registration for the unit from the Pharmacy Quality Assurance Commission.
2. Submit the Medication Unit Notification Form to DOH with that registration number.
3. Submit form SMA-162 to SAMHSA, which forwards its approval to the DEA.
4. Obtain the DEA registration; the DEA arranges an inspection after it receives SAMHSA's approval.
5. DOH notifies the State Opioid Treatment Authority once the unit has an active registration and an approved notification form.

The unit may only provide services the OTP is already certified to provide; anything new must be added to the agency license first. There is no set distance limit from the main program, the program sponsor is responsible for every unit, existing accreditation standards apply to the unit without a separate fee, and the community relations plan must document outreach where the unit will be located. Mobile units follow a similar path with their own registration requirements.

What does it cost, and how long does it take?

The DOH fees come from WAC 246-341-0365, effective July 15, 2025: $2,250 for a new agency application, $1,150 for a branch, $450 to add one or more certifications and $1,150 for a change of ownership. Outpatient services then carry an annual fee by service hours, from $1,650 for under 4,000 hours to $5,800 for 50,000 hours or more without deemed status, or $830 to $2,900 with it. A substantiated complaint or critical incident investigation costs $2,250. Half the application fee is refundable if the application is withdrawn before a decision; nothing is refunded after a denial, revocation or suspension. SAMHSA certification and DOH accreditation carry no fee today.

DOH publishes no processing time, and the federal approvals run on their own clocks. The programs we see open fastest treat the four tracks as parallel work from the first month: the community relations plan and county conversation, the pharmacy commission registration, the policies and procedures DOH must approve before it issues anything, and the accreditation application that unlocks provisional federal certification. Running them one after another is the most common reason an OTP launch slips. Once licensed, enrollment with Apple Health and the managed care plans is its own project, covered in our guide to OTP billing mistakes and handled by our behavioral health billing team.

Frequently asked questions

Does Washington issue a separate methadone clinic license?

No. A program that dispenses methadone is licensed by the Department of Health as a behavioral health agency and certified as an opioid treatment program under WAC 246-341-1000. Before DOH issues that license, the applicant must hold approvals from the Pharmacy Quality Assurance Commission, SAMHSA and the DEA.

Who is the State Opioid Treatment Authority in Washington?

The State Opioid Treatment Authority sits at the Washington State Health Care Authority, not at DOH. SAMHSA consults it on applications, it must approve interim treatment along with SAMHSA, and WAC 246-341-1000 requires its approval, together with SAMHSA, for take-home exceptions.

Can a city or county cap the size of an opioid treatment program?

No. RCW 71.24.590 says no city or county legislative authority may impose a maximum capacity on an opioid treatment program. Local governments may require a conditional use permit with reasonable conditions, but only if the same requirements apply to other essential public facilities and health care settings.

Can a Washington OTP dispense from a site away from its main clinic?

Yes. Since the WAC 246-341 revisions took effect on January 31, 2025, a licensed OTP may run a fixed-site medication unit or a mobile unit as part of the program. The unit needs a Pharmacy Quality Assurance Commission registration, a DOH notification form, SAMHSA form SMA-162 and DEA registration, and it may only provide services the OTP is already certified to provide.

Does DOH charge for opioid treatment program accreditation?

Not yet. DOH is a SAMHSA-approved accreditation body and has accredited Washington OTPs at no charge. Senate Bill 5988, Chapter 73, Laws of 2026, effective June 11, 2026, gave DOH authority to charge for that service, and a rulemaking to set the fee held workshops in September 2026. The amount had not been proposed as of October 2026.

Opening an OTP in Washington with one accountable partner

An opioid treatment program is the most heavily regulated license in behavioral health, and in Washington it touches DOH, the pharmacy commission, the Health Care Authority, SAMHSA and the DEA before the first dose. Saint Health Group runs that whole sequence: we write the policies DOH approves, build the community relations plan and the county record, prepare the accreditation application and run the mock survey, and set up the billing so the program collects from the day it opens. See our Washington behavioral health consulting page and our licensing and accreditation services, or talk to us about your site. If you are also weighing an intensive outpatient level of care alongside the OTP, our guide to starting an IOP in Washington covers the certification that pairs with it.