When did Medicare start covering intensive outpatient programs?

For items and services furnished on or after January 1, 2024, under section 4124 of the Consolidated Appropriations Act, 2023, as implemented in the CY 2024 outpatient payment rule.

How many hours a week does Medicare IOP require?

Patients must require a minimum of 9 hours per week of therapeutic services, as shown in the plan of care, and the physician certification and each recertification must say so.

Can an opioid treatment program bill Medicare for IOP?

Yes. OTP intensive outpatient services are part of Medicare's OUD treatment services, with a weekly adjustment when at least nine such services are furnished in a week.

How often must Medicare IOP be recertified?

At intervals the provider sets, but no less often than every 60 days, by a treating physician. For OTPs, recertification may occur any time during an episode of care.

Medicare's Intensive Outpatient Benefit: Nine Hours a Week and Who Can Furnish It

For years Medicare covered partial hospitalization but had no benefit for the step below it. The Consolidated Appropriations Act, 2023 changed that. As CMS explained in the CY 2024 outpatient payment rule, section 4124 "established Medicare coverage for intensive outpatient services effective for items and services furnished on or after January 1, 2024," and Medicare began "paying for intensive outpatient services furnished by hospital outpatient departments, community mental health centers, federally qualified health centers, and rural health clinics" (88 FR 81540). The same rule created a parallel benefit for intensive outpatient services furnished by opioid treatment programs.

What is an intensive outpatient program under Medicare?

Medicare defines intensive outpatient services as "a distinct and organized intensive ambulatory treatment program that offers less than 24-hour daily care other than in an individual's home or in an inpatient or residential setting," and adds that they "are not required to be provided in lieu of inpatient hospitalization" (42 CFR 410.2). That last clause is the main contrast with partial hospitalization, whose certification must say the patient would otherwise need inpatient psychiatric care (42 CFR 424.24(e)(1)).

Which patients is it for?

Intensive outpatient programs are intended for patients who (42 CFR 410.44(c)):

"Require a minimum of 9 hours per week of therapeutic services as evidenced in their plan of care."
Are likely to benefit from a coordinated program and need more than isolated outpatient sessions.
Do not require 24-hour care.
Have an adequate support system while not in the program.
Have a mental health or substance use disorder diagnosis.
Are not judged to be dangerous to themselves or others.
Can participate in and tolerate the intensity of active treatment.

Partial hospitalization, by comparison, is for patients who need at least 20 hours a week (410.43(c)(1)).

What services are included?

Under 410.44(a)(4), intensive outpatient services include individual and group therapy with physicians or other mental health professionals, including substance use disorder professionals, to the extent state law authorizes; occupational therapy; services of social workers, trained psychiatric nurses and other staff trained to work with psychiatric patients, including patients with SUD; therapeutic drugs and biologicals; individualized activity therapies that are not primarily recreational or diversionary; family counseling focused on the patient's condition; patient training and education closely tied to treatment; and diagnostic services. Certain practitioners' professional services, such as physician, PA, NP and clinical nurse specialist services, are covered and paid separately rather than as intensive outpatient services (410.44(b)).

What certification and plan of care are required?

Each patient needs a physician certification that the individual "requires such services for a minimum of 9 hours per week," that services are furnished while under a physician's care, and that they follow a written plan of treatment (42 CFR 424.24(d)(1)). The plan is individualized, established and periodically reviewed by a physician with program staff, and sets out the diagnosis, the type, amount, duration and frequency of services, and treatment goals (424.24(d)(2)). Recertification must be signed by a treating physician, at intervals the provider sets "but no less frequently than every 60 days," and must state the patient still needs at least 9 hours a week, with the response to treatment, continuing symptoms and discharge-planning goals (424.24(d)(3)).

Who can furnish it, and what does each setting need?

Community mental health centers. Medicare covers intensive outpatient services furnished by a CMHC with a provider agreement, prescribed by and furnished under the general supervision of a physician (42 CFR 410.111). The CMHC conditions of participation now include an intensive outpatient standard (485.918(g)), and a CMHC's provider agreement covers only partial hospitalization and intensive outpatient services (489.2(c)(2)). The 2024 rule also added a definition of marriage and family therapists and revised the definition of mental health counselors in the CMHC personnel rules (88 FR 81540). See Medicare enrollment for CMHCs.
Hospital outpatient departments furnish it under the hospital's enrollment and the outpatient payment system.
Federally qualified health centers and rural health clinics were added as settings by the same rule.
Opioid treatment programs. "OTP intensive outpatient services" are part of Medicare's OUD treatment services, with a weekly payment adjustment when at least nine such services are furnished in a week. A physician or non-physician practitioner, where state law and scope permit, certifies the need for at least nine hours of services a week, and recertification may occur any time during an episode of care (42 CFR 410.67(b), (c)(5), (d)(4)). CMS's OTP page lists intensive outpatient program services among covered OTP services. See Medicare enrollment for OTPs.

Does Medicare coverage replace the state license?

No. Medicare coverage is a payment rule. The program still needs whatever state license or certification covers intensive outpatient services in its state, and many states license IOP as a service component or endorsement on the agency's license. Our post on licensing outpatient, IOP and PHP programs explains the common structures, and our state pages show what we have verified for each state.

Which clinicians can bill in their own right?

A separate change in the Consolidated Appropriations Act, 2023 (section 4121) created a Medicare benefit category for services furnished and billed by mental health counselors and marriage and family therapists, as the CY 2024 rule notes. That is clinician enrollment, not facility enrollment. Our sister sites cover it for mental health counselors and MFTs.

What should a program have in place before billing IOP?

The right Medicare enrollment for its setting (CMHC, hospital, FQHC, RHC or OTP).
State licensing for intensive outpatient services.
Admission criteria tracking 410.44(c), and a schedule that delivers at least nine hours of therapeutic services a week for patients who need them.
Certification, plan of treatment and recertification forms and workflows matching 424.24(d), or 410.67(c)(5) for OTPs.
Staffing within each clinician's state scope of practice.

How do we help?

We license the program and the building: State License packages start at $1,995 for an outpatient program including IOP or PHP at one site, and adding an IOP component to an existing license is $595. Our Medicare CMHC Enrollment service is $1,995, and our Policy and Procedure Manual add-on ($1,495) builds the admission, certification and plan-of-care policies. Clinical decisions stay with your physicians and practitioners. See pricing.