Determination and Documentation of Medical Necessity in an Inpatient Rehabilitation Facility - Medical Necessity Guideline 085 - Overview and Definitions

Sep 16, 2026

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Determination and documentation requirements outline how inpatient rehabilitation facilities (IRFs) deliver intensive, goal-oriented rehabilitative services for patients whose complex nursing, medical management, and rehabilitation needs require an interdisciplinary inpatient setting. The guideline defines IRF scope, interdisciplinary team structure led by a rehabilitation physician, and the roles of key professionals, including medical doctors, non-physician practitioners, social workers, case managers, and licensed therapy disciplines. It also defines physical and occupational therapy as skilled services aimed at improving functional impairment.

LanguageEnglish

CategoryLetters

FormatPDF

Pages6

Reading Time2 min

AccessFree to download

Overview

Interdisciplinary services and team leadership

Definitions

Inpatient Rehabilitation Facility (IRF)

Medical Doctor (MD) and Non-physician practitioner (NPP)

Social Worker (SW) and Case Manager (CM)

Physical Therapy (PT) and Occupational Therapy (OT)

| Medical Necessity Guideline (MNG) Title: Determination and Documentation of Medical Necessity in an Inpatient Rehabilitation Facility | | | | --- | --- | --- | | MNG \#: 085 | ☒ CCA Senior Care Options (HMOD-SNP) (MA)
☒ CCA One Care (MedicareMedicaid) (MA) | Prior Authorization Needed?
☒ Yes (always required)☐ Yes (only in certain situations. See this MNG for details)
☐ No | | Benefit Type:
☒ Medicare
☐ Medicaid | Original Approval Date:
10/14/2021; 1/11/2024 | Effective Date:
2/06/2022; 1/11/2024; 1/1/2025 | | Last Revised Date:
5/30/2022; 01/11/2024; 1/9/2025 | Next Annual Review Date:
10/14/2022; 5/30/2023; 01/11/2025; 1/9/2026 | Retire Date: | OVERVIEW: Inpatient rehabilitation hospitals and rehabilitation units of acute-care hospitals, collectively known as Inpatient Rehabilitation Facilities (IRFs), provide intensive rehabilitation therapy in a resource-intensive inpatient hospital environment for patients who, because of the complexity of their nursing, medical management, and rehabilitation needs, require and can reasonably be expected to benefit from an inpatient stay and an interdisciplinary team approach to the delivery of rehabilitation care (the Medicare Benefit Policy Manual (the Manual), Pub. No. 100-02, chapter 1, § 110) . The goal-oriented rehabilitative services require the skills of a rehabilitation physician with specialized training and experience in rehabilitative services, a registered nurse with specialized training and experience in rehabilitation, a social worker or case manager (or both), and a licensed physical, speech/language and occupational therapists to safely and effectively furnish a recognized therapy service whose goal is improvement of an impairment or functional limitation for patients that are admitted to an Acute Rehabilitation Hospital. Interdisciplinary services are those provided by a treatment team in which all members participate in a coordinated effort to benefit the patient and the patient’s significant others and caregivers. Interdisciplinary services, by definition, cannot be provided by only one discipline. Though individual members of the interdisciplinary teamwork within their own scopes of practice, each professional is also expected to coordinate with team members of other specialties, as well as with the patient and the patient’s significant others and caregivers. The purpose of the interdisciplinary team is to foster frequent, structured, and documented communication among disciplines to establish, prioritize, and achieve treatment goals. The interdisciplinary team must be led by a rehabilitation physician, remotely or in person, and meet weekly at minimum. DEFINITIONS: Inpatient Rehabilitation Facility (IRF)–-A facility, or a unit within a facility, devoted to the provision of comprehensive services to patients whose handicaps are primarily physical, coordinated with efforts to minimize the patient's behavioral, social, and vocational disadvantages. The course of treatment is limited to the period in which the member continues to make progress toward his or her treatment goal, as described in the member's service plan. Medical Doctor (MD)– A physician provider who is registered and licensed to practice medicine. Non-physician practitioner (NPP)– A nurse practitioner, physician’s assistant, or clinical nurse specialist who is licensed in Massachusetts to perform medical services according to their scope of practice. Ordering non-physician practitioners are also allowed to conduct face-to-face encounters. In the case of nurse practitioners and nursing specialists, ordering is permitted only when the nurse is under the supervision of a physician or has a collaborative practice agreement with a physician. Social Worker (SW)– An individual who by training and experience meets the requirements for licensing by the board and is duly licensed to engage in the practice of social work in the commonwealth by offering and providing serv

FAQs

What is the purpose of interdisciplinary services in an inpatient rehabilitation facility (IRF)?

Interdisciplinary services coordinate treatment efforts among different disciplines to benefit the patient and caregivers. The team supports frequent, structured, documented communication to establish, prioritize, and achieve treatment goals.

Who must lead the interdisciplinary team for an IRF?

The interdisciplinary team must be led by a rehabilitation physician, whether remotely or in person, and meet weekly at minimum.

How are physical therapy (PT) and occupational therapy (OT) defined in this guideline?

PT refers to skilled therapy services that improve, develop, correct, rehabilitate, or prevent worsening of physical functional capabilities. OT refers to skilled therapy services that improve, develop, correct, rehabilitate, or prevent worsening of functions affecting activities of daily living (ADLs) and instrumental activities (IADLs).

Sep 16, 2026

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