The code: H0018
AHCCCS pays behavioral health residential facilities, provider type B8, a per diem under HCPCS code H0018: behavioral health, short-term residential (non-hospital residential treatment program), without room and board, per diem. AHCCCS training describes H0018 as the only code approved for BHRF providers to bill for covered services.[3] As the description says, the rate does not include room and board.[4]
How to put it on a claim
- Claim form: the CMS-1500, or its electronic equivalent, the 837P.[3]
- One line per day: for claims received on or after March 1, 2024, H0018 is billed on a single line item per date of service. A date span on one line is denied.[1] Earlier guidance that allowed up to seven days per line no longer applies to fee-for-service claims.
- Place of service 56 (psychiatric residential treatment), for dates of service from December 1, 2023.[2]
These are the AHCCCS fee-for-service rules. Health plans that pay BHRF claims for their members publish their own provider manuals, so check the plan's manual for anything it adds. For codes and modifiers across behavioral health services, AHCCCS's reference is the Covered Behavioral Health Services Guide.[9]
What the per diem covers
H0018 is inclusive. AHCCCS describes it as covering screening, assessment, counseling, case management, rehabilitation, and supportive services, and counseling and therapy cannot be billed separately unless otherwise noted.[4][3]
The exception is specialized counseling or therapy that is medically necessary and in the service plan, delivered by a behavioral health professional who is an independent licensed practitioner not affiliated with the facility, and billed under that professional's own NPI with the appropriate CPT code. Counseling by a behavioral health technician is not billable.[4]
Prior authorization under AMPM 320-V
AHCCCS revised its BHRF policy, AMPM 320-V, effective October 1, 2026. This section was written from the version in effect before that date and from AHCCCS's 2026 prior authorization training, so read it alongside the current policy.[5][6]
Every stay is authorized
BHRF services require prior and continued authorization, and AHCCCS treats every BHRF authorization request as expedited.[5]
Who authorizes
It depends on how the member is covered.[5][6]
- Members of an AHCCCS health plan: the member's health plan.
- Fee-for-service members, such as American Indian Health Program members: the AHCCCS Division of Fee-for-Service Management (DFSM) prior authorization unit, through the AHCCCS Online provider portal.
- IHS and Tribal 638 facilities: BHRF services they provide to Title XIX members do not require prior authorization.
What the admission has to show
The policy's admission criteria, in summary: a diagnosed behavioral health condition; at least one area of serious functional impairment; significant risk of harm within the past three months; treatment that cannot be delivered in a less restrictive setting; and a need for 24-hour care and supervision.[5]
Certification and recertification of need (fee-for-service)
For fee-for-service members, a Certification of Need covers the first 30 days, after which a Recertification of Need is required. Each recertification is supported by notes from the most recent seven consecutive days. For direct admissions from a BHIF or the crisis system, an Admission Notification Form is used, and DFSM authorizes up to the first five days.[6]
Continued stay
Continued stay requests are due at least two weeks before the last authorized date, with the current treatment plan, progress or regression, ongoing risk and impairment, interventions, the crisis plan, and the revised discharge plan.[5] In practice that means the treatment plan and the progress notes have to be current well before the authorization runs out, which is why the documentation in shift notes and treatment plans matters to billing as much as to licensing.
Timely filing
Under A.R.S. 36-2904(G), AHCCCS and its contracted health plans do not pay claims first submitted more than six months after the date of service, or after the date eligibility is posted if that is later, or claims that reach clean-claim status more than twelve months after the date of service.[7][8] A clean claim is one that can be processed without obtaining additional information, and does not include claims under investigation for fraud or abuse or under review for medical necessity.[7]
Why BHRF claims get denied
Each of the rules above has a matching denial. Check for these before a claim goes out:
- Several days of H0018 on one line instead of one line per date of service.
- A place of service other than 56.
- Dates of service outside the authorized period, or no authorization on file.
- Counseling or therapy billed separately when the per diem already covers it.
- A claim filed more than six months after the date of service.
- A continued stay request sent too late, leaving days without authorization.
Dacnus Billing & Payments works from the same record as intake and care. Authorizations are tracked by units approved, used, and remaining; claims export as a CMS-1500 PDF or an 837P file, one claim or a batch; and denials are logged with their appeal deadlines and outcomes.