Working in early intervention (IDEA Part C) as an OT, PT, or SLP
Early intervention is the IDEA Part C program for infants and toddlers with disabilities, under age three, and their families. The federal Part C regulations list occupational therapy, physical therapy, and speech-language pathology services as early intervention services, and occupational therapists, physical therapists, and speech and language pathologists as qualified personnel. Services are provided under an Individualized Family Service Plan (IFSP) and, to the maximum extent appropriate, in natural environments such as the home. School-age related services are a different part of IDEA; see working in schools.
Quoted from official pages checked November 10, 2026. Confirm current requirements, fees, and dates on those sites. This page is not legal advice and does not guarantee eligibility, certification, or licensure.
Who Part C serves
The U.S. Department of Education’s IDEA regulation 34 CFR 303.21, checked November 10, 2026, states: “Infant or toddler with a disability means an individual under three years of age who needs early intervention services because the individual—”. It goes on to developmental delay and diagnosed conditions. It also allows states, at their discretion, to include at-risk infants and toddlers and some children past age three. Check your state’s Part C program for how it applies these rules. No eligibility rules are added here. The purpose section, 34 CFR 303.1, describes “a statewide, comprehensive, coordinated, multidisciplinary, interagency system that provides early intervention services for infants and toddlers with disabilities and their families”.
OT, PT, and SLP as early intervention services
34 CFR 303.13 Early intervention services states: “Early intervention services means developmental services that—”. Its list includes that they “Are provided under public supervision”, that they “Are selected in collaboration with the parents”, and that they “Are provided in conformity with an IFSP”. It defines the three therapies:
Occupational therapy includes services to address the functional needs of an infant or toddler with a disability related to adaptive development, adaptive behavior, and play, and sensory, motor, and postural development.
Physical therapy includes services to address the promotion of sensorimotor function through enhancement of musculoskeletal status, neurobehavioral organization, perceptual and motor development, cardiopulmonary status, and effective environmental adaptation.
Speech-language pathology services include “Identification of children with communication or language disorders and delays in development of communication skills, including the diagnosis and appraisal of specific disorders and delays in those skills” and “Provision of services for the habilitation, rehabilitation, or prevention of communication or language disorders and delays in development of communication skills.”
Paragraph (c), “Qualified personnel”, lists the types of personnel who provide early intervention services. The list includes “Occupational therapists.”, “Physical therapists.”, and “Speech and language pathologists.” 34 CFR 303.31 defines qualified personnel as “personnel who have met State approved or recognized certification, licensing, registration, or other comparable requirements that apply to the areas in which the individuals are conducting evaluations or assessments or providing early intervention services.” The regulation names no national credential beyond that.
Where services happen
Section 303.13 says services, “To the maximum extent appropriate, are provided in natural environments”. 34 CFR 303.26 states: “Natural environments means settings that are natural or typical for a same-aged infant or toddler without a disability, may include the home or community settings, and must be consistent with the provisions of §303.126.” The current codified text of Part 303 is on eCFR.
Part C versus school-based services
Part C covers infants and toddlers, with services set out in an IFSP. The school-age related services quoted on working in schools come from a different set of IDEA regulations, 34 CFR Part 300, section 300.34. ASHA’s Early Intervention Practice Portal page, checked November 10, 2026, states: “Under IDEA (2004), EI begins when a child is referred to the Part C system and ends when a child transitions out of EI—typically at 36 months of age.” It also states: “Eligibility for EI services or special education services once a child turns 3 years of age is based on specific state criteria.”
Speech-language pathologists: ASHA
ASHA’s page states: “Under Part C of IDEA (2004), states receive federal grants to provide comprehensive, coordinated EI services to all eligible infants and toddlers with disabilities, from birth to 3 years, and their families.” It adds: “States may differ in terms of which agency they designate to lead the Part C program (e.g., Department of Health, Department of Education, or Department of Rehabilitation Services) and what they choose to name their EI system (e.g., Infants and Toddlers, Early Steps, Strong Start).” On credentials, it states: “Requirements for audiologists and speech-language pathologists (SLPs) who work in Part C EI programs also vary by state”. It also states: “Audiologists and speech-language pathologists may serve as the primary referral source to Part C programs”. ASHA’s employment settings page says SLPs who provide home care services may “work in early intervention programs”.
Occupational therapists and physical therapists
BLS’s occupational therapists page states: “Some occupational therapists work with children in inpatient, outpatient, or educational settings. They may provide early intervention therapy to infants and toddlers or work with school-aged children to encourage engagement, such as participating in academic activities.” BLS’s physical therapists page does not mention early intervention. APTA’s Practice Models and Settings page, checked the same day, lists school-based physical therapy but no early intervention collection, and states that it “is not an exhaustive list.” AOTA’s pages returned no readable content, so no AOTA early intervention material is quoted.
What this page does not do
It gives no caseload numbers, eligibility percentages, evaluation timelines, or state agency names beyond ASHA’s examples. Each state’s lead agency publishes its own rules.
Pay
This page copies no wages. BLS median pay by industry is on OT, OTA, PT, PTA, and SLP work settings, and national figures are on pay and outlook.