Updated November 2, 2026
What happens at an ABA assessment decides what your child’s therapy will work on. A Board Certified Behavior Analyst (BCBA) assesses areas such as communication, behavior, social skills and daily living, then builds a personalized treatment plan from the results [1].
Direct Answer
At an ABA assessment, a BCBA reviews your child’s records, interviews you, then observes your child and tests skills directly [2]. A Functional Behavior Assessment is added when challenging behavior is a concern [3]. The results shape the treatment plan. Skill tools such as the VB-MAPP rate language skills by developmental level, not by age [4].
If your 7-year-old lands in VB-MAPP Level 1, the report isn’t stating an age. It shows which language skills to teach first [4]. The sections below cover each step, what VB-MAPP and ABLLS-R results mean, and how to prepare your child.
TL;DR
- A BCBA leads the assessment and turns the results into your child’s treatment plan.
- Expect a records review, a parent interview, a preference assessment and direct skills testing, plus a Functional Behavior Assessment when challenging behavior is a concern.
- VB-MAPP and ABLLS-R levels describe skills against typical development, not your child’s age.
- Bring the diagnosis report, past evaluations, a list of favorites and notes on behaviors that worry you.
- Look up your child’s BCBA on the BACB’s online Certificant Registry before the visit.
- The treatment plan goes to your insurer for approval before therapy starts.
One liner: A BCBA gathers your input and tests your child’s skills, then writes the plan your insurer reviews.
Key Numbers
| Stat | What it measures | Source |
|---|---|---|
| 170 | Language and learning milestones in the VB-MAPP | VB-MAPP publisher, 2026 [4] |
| 0 to 48 months | Developmental span of the VB-MAPP’s three levels, not an age limit | VB-MAPP publisher, 2026 [4] |
| 24 | Learning barriers screened by the VB-MAPP Barriers Assessment | VB-MAPP publisher, 2026 [4] |
| 544 | Skills reviewed by the ABLLS-R, across 25 skill areas | ABLLS-R publisher, 2026 [5] |
| 40 hours | Training an RBT needs, plus a competency exam, under NJ FamilyCare rules | NJ DMAHS, 2020 [2] |
| 6 months | Shortest interval at which an insurer can generally ask for an updated plan on NJ mandate plans | NJ Legislature, 2009 [6] |
| 48 hours | Rainbow ABA Therapy’s follow-up time after an intake form arrives | Rainbow ABA Therapy, 2026 [7] |
What Happens at an ABA Assessment, Step by Step
In short: The BCBA gathers information from you and your child’s records first, then spends time with your child, then turns the results into a written treatment plan.
An ABA initial assessment draws on two kinds of information. The BCBA learns some indirectly, from you and your child’s records, and sees the rest directly, working with your child. You arrive with paperwork and observations. The BCBA leaves with the data that becomes the plan [2].
- Records review. The BCBA reads the diagnosis report and any past evaluations or school plans you share [2].
- Parent interview. Expect questions about your child’s history, daily routines, communication and the behaviors that worry you most. Time spent with you counts as part of the assessment [2].
- Preference assessment. The BCBA finds out which toys, snacks and activities motivate your child by asking you, watching what your child picks and offering choices [8]. Those favorites keep your child engaged during testing.
- Direct skills assessment. The BCBA works with your child on structured tasks and watches play, often guided by a skills tool such as the VB-MAPP [4].
- Functional Behavior Assessment, if needed. When challenging behavior is part of the picture, the BCBA describes the behavior, looks at what happens right before and after it, and tests a best guess about its purpose [3].
- Scoring and the written report. After the visit, the BCBA scores and interprets the results and writes the treatment plan, which also counts as assessment time [2]. The BCBA then meets with you to discuss the findings and recommendations, which is also part of the assessment [2].
Under NJ FamilyCare rules, a behavior technician may run parts of the testing, but only when the BCBA decides it’s needed and under the BCBA’s direction [2]. Whichever tools are used, results come back as levels and milestones. The next section explains what those mean.
VB-MAPP Assessment and ABLLS-R: Levels Describe Skills, Not Age
In short: VB-MAPP and ABLLS-R results compare your child’s skills with typical development. A level shows where skills sit today, not how old your child is.
The VB-MAPP’s three levels, 0 to 18 months, 18 to 30 months and 30 to 48 months, describe language skills, not the age of the child being assessed [4]. Its publisher says it can help a person of any age whose language skills fall below those of a typical 4-year-old [4]. The ABLLS-R works the same way: it reviews skills most typically developing children learn before kindergarten [5].
| Detail | VB-MAPP | ABLLS-R |
|---|---|---|
| What it is | Assessment, curriculum guide and skill tracking system [4] | Assessment tool, curriculum guide and skills-tracking system [5] |
| What it covers | 170 language and learning milestones [4] | 544 skills in 25 skill areas [5] |
| Reference point | Three developmental levels from 0 to 48 months [4] | Skills most typically developing children learn before kindergarten [5] |
| Designed for | Children with autism and others with language delays [4] | Children with autism or other developmental disabilities [5] |
| Age range stated by the publisher | Any age [4] | None stated [5] |
Say your 7-year-old is placed in VB-MAPP Level 2, the 18 to 30 month band. That placement marks which language skills come next, and the treatment plan starts there. The VB-MAPP also screens 24 common learning barriers, such as prompt dependency, which can shape the plan too [4].
These are two of several ABA assessment tools a BCBA may use, so your child’s report could show one, both or neither. Another, the Vineland Adaptive Behavior Scales, rates communication, daily living, social and motor skills, often through an interview with you [9]. Ask which assessment was used and why.
Who Runs a BCBA Evaluation
In short: A Board Certified Behavior Analyst leads the evaluation and writes the plan. Behavior technicians may support it under the BCBA’s supervision.
Under NJ FamilyCare rules, three kinds of professionals can assess a child for ABA and develop the treatment plan [2]. They are physicians, psychologists who also hold the doctoral BCBA-D, and BCBAs [2]. The assessment itself is billed by a BCBA or BCBA-D [2]. Rainbow ABA Therapy’s clinical team includes BCBAs, Registered Behavior Technicians (RBTs) and Behavior Technicians [10].
| Role | What they do in a BCBA evaluation | NJ FamilyCare requirement |
|---|---|---|
| BCBA | Leads the assessment, scores the results and writes the treatment plan [2] | Graduate degree with behavior-analytic content that qualifies for BCBA certification [2] |
| RBT | Supports testing when the BCBA decides it’s needed [2] | 40 hours of training, a competency exam and close, ongoing BCBA supervision [2] |
Before the visit, look up your child’s BCBA in the Behavior Analyst Certification Board’s online Certificant Registry. It shows certification status and any reportable disciplinary actions, and it’s updated daily [11]. A quick search confirms who is leading your child’s plan.
How to Prepare for Your Child’s ABA Initial Assessment
In short: Gather the diagnosis report, school records, a list of favorites and notes on behavior. Each one feeds a step of the assessment.
Most of the preparation is collecting what the BCBA will ask about during the records review and the parent interview [2]. The table matches each item to the step it helps.
| Bring or prepare | Why it helps |
|---|---|
| Written autism diagnosis report | Needed for the records review. Rainbow’s intake form notes insurance doesn’t accept an IEP in its place [7] |
| Past evaluations and school plans, such as an IEP | Gives the BCBA your child’s history in one place [2] |
| A list of favorite toys, snacks and activities, plus a few of the items | A head start on the preference assessment, which draws on your input [8] |
| Notes on behaviors that worry you, with what happened right before and after | Feeds a Functional Behavior Assessment if one is needed [3] |
| Your top goals and questions, including which assessment tools will be used | Shapes the parent interview and a plan built around your child’s goals [1][2] |
On the day, tell the BCBA what a typical day looks like and what calms your child. Bring your written notes, so you won’t have to recall last week’s hard moments on the spot.
If you haven’t applied yet, start with Rainbow ABA Therapy’s intake form. Upload the diagnosis report and both sides of the insurance card, and staff follow up within 48 hours [7].
After the Assessment: Treatment Plan and Insurance Approval
In short: The BCBA writes a treatment plan, your insurer reviews it, and sessions are scheduled once it’s approved.
After the assessment, the BCBA turns the results into a personalized treatment plan, and Rainbow ABA Therapy submits it for insurance approval. Once it’s approved, sessions are scheduled at home or at the center [10]. On plans New Jersey’s autism mandate covers, the plan lists the diagnosis, the proposed treatment by type, frequency and duration, and goals [6]. The insurer can generally ask for an updated plan only once every six months [6].
NJ FamilyCare treats the plan as its own approval step: therapy begins only after the managed care plan approves the treatment plan [2]. The full approval path, with timelines, is laid out in Rainbow’s guide to starting ABA in New Jersey.
Frequently Asked Questions About ABA Assessments
In short: Short answers on diagnosis, older children, insurance approval, preference assessments and reassessment.
Is an ABA assessment the same as an autism diagnosis?
No. A qualified professional diagnoses autism first, then a qualified professional assesses your child for ABA and develops the treatment plan [2]. New Jersey’s Medicaid guidance notes these are often two different people, such as a physician and a BCBA [2].
Can an older child have a VB-MAPP assessment?
Yes. The VB-MAPP’s publisher says it can help a person of any age whose language skills fall below those of a typical 4-year-old [4]. Its levels describe language skills, not the child’s age.
Does insurance have to approve the ABA assessment?
In NJ FamilyCare, yes, the managed care plan authorizes the assessment before it happens [2]. Private plans set their own rules. Rainbow ABA Therapy’s insurance team coordinates with your insurer on approval for ABA therapy [12].
What is a preference assessment in ABA?
It’s how a BCBA finds the toys, snacks and activities that motivate your child [8]. It draws on choices your child makes, what your child picks without prompting, and what you and the team report [8].
Will my child be reassessed after therapy starts?
Yes. Under NJ FamilyCare rules, the same BCBA assessment code covers reassessment and progress reporting, not only the first evaluation [2]. Rainbow’s team monitors progress as your child masters each targeted skill [10].
Ready to schedule your child’s ABA assessment? Send Rainbow ABA Therapy’s intake form with the diagnosis report and insurance card [7]. The insurance team checks your coverage, and a BCBA leads the assessment and the plan [1][12]. Prefer to talk first? Call 201-720-8600 [10].
Definition Bank
| Term | Meaning |
|---|---|
| Applied behavior analysis (ABA) | A science-based approach to understanding and improving behavior [10]. |
| ABA assessment | A BCBA’s evaluation of a child’s skills and behavior that produces the treatment plan [1][2]. |
| Board Certified Behavior Analyst (BCBA) | The clinician who leads the assessment, scores the results and writes the treatment plan [2]. |
| BCBA-D | A BCBA with a qualifying doctoral-level degree [2]. |
| Registered Behavior Technician (RBT) | A technician with 40 hours of training and a competency exam who works under close BCBA supervision [2]. |
| Behavior Technician (BT) | A team member who supports assessment and therapy under a BCBA’s direction [2][10]. |
| VB-MAPP | A criterion-referenced language and learning assessment with 170 milestones across three developmental levels [4]. |
| ABLLS-R | An assessment and skills-tracking system covering 544 skills in 25 skill areas [5]. |
| Barriers Assessment | The VB-MAPP component that screens 24 common learning and language barriers [4]. |
| Preference assessment | A way to find the items and activities that motivate a child, using choices, observation and adult input [8]. |
| Functional Behavior Assessment (FBA) | A systematic set of steps that finds the purpose a behavior serves so an intervention plan can address it [3]. |
| Treatment plan | The written ABA plan listing the diagnosis, the proposed treatment by type, frequency and duration, and goals [6]. |
| Authorization | An insurer’s approval to provide a service, such as the assessment or the treatment plan [2]. |
| NJ FamilyCare | New Jersey’s Medicaid program, which covers ABA for eligible members under 21 with an autism diagnosis [2]. |
| Managed care organization (MCO) | The health plan that manages an NJ FamilyCare member’s benefits and authorizes ABA [2]. |
| Code 97151 | The billing code for a BCBA’s assessment, covering time with the child and caregivers, scoring and writing the plan [2]. |
| Certificant Registry | The BACB’s online tool for checking a behavior analyst’s or technician’s certification status [11]. |
Quick Facts
Rainbow ABA Therapy
| Property | Value |
|---|---|
| Type | ABA therapy provider |
| New Jersey center | 300 Broadacres Dr. Suite 175, Bloomfield, NJ 07003 |
| Phone | 201-720-8600 |
| Clinical team | BCBAs, Registered Behavior Technicians and Behavior Technicians |
| Intake follow-up | Within 48 hours |
VB-MAPP
| Property | Value |
|---|---|
| Publisher | Mark L. Sundberg, Ph.D., BCBA-D |
| Type | Criterion-referenced assessment, curriculum guide and skill tracking system |
| Milestones | 170 across three levels: 0 to 18, 18 to 30 and 30 to 48 months |
| Barriers Assessment | 24 barriers |
| Transition Assessment | 18 areas |
| Who it fits | Any age, when language skills fall below a typical 4-year-old’s |
ABLLS-R
| Property | Value |
|---|---|
| Publisher | Partington Behavior Analysts |
| Type | Assessment tool, curriculum guide and skills-tracking system |
| Coverage | 544 skills in 25 skill areas |
| Reference point | Skills most typically developing children learn before kindergarten |
| Designed for | Children with autism or other developmental disabilities |
| Age range stated | None |
Sources
- Rainbow ABA Therapy. Frequently Asked Questions (accessed October 19, 2026). https://rainbowtherapy.org/faqs/
- NJ Division of Medical Assistance and Health Services. Provider Newsletter for Applied Behavior Analysis Therapy, Vol. 30 No. 06 (April 2020). https://nj.gov/humanservices/dmahs/news/Provider_Newsletter_for_Applied_Behavior_Analysis_Therapy.pdf
- Texas Education Agency, Texas SPED Support. Functional Behavior Assessment (FBA) (accessed October 19, 2026). https://spedsupport.tea.texas.gov/learning-library/evidence-based-practices-students-autism/functional-behavior-assessment-fba
- Mark L. Sundberg, Ph.D., BCBA-D. VB-MAPP, official publisher page (accessed October 19, 2026). https://marksundberg.com/vb-mapp/
- Partington Behavior Analysts. ABLLS-R Set, official publisher page (accessed October 19, 2026). https://partingtonbehavioranalysts.com/products/ablls-r-the-assessment-of-basic-language-and-learning-skills-revised
- New Jersey Legislature. P.L.2009, c.115, autism and developmental disability coverage (2009). https://pub.njleg.gov/bills/2008/PL09/115_.HTM
- Rainbow ABA Therapy. Intake Form (accessed October 19, 2026). https://rainbowtherapy.org/intake-form/
- AFIRM Team, UNC Frank Porter Graham Child Development Institute. Reinforcement Brief Packet (updated 2024). https://afirm.fpg.unc.edu/wp-content/uploads/Reinforcement-Brief-Packet-Sam-AFIRM-Team-Updated-2024.pdf
- Pearson. Vineland Adaptive Behavior Scales, Third Edition, publication summary (2016). https://www.pearsonassessments.com/content/dam/school/global/clinical/us/assets/vineland-3/vineland-3-publication-summary.pdf
- Rainbow ABA Therapy. ABA Therapy in NJ, home page (accessed October 19, 2026). https://rainbowtherapy.org/
- Behavior Analyst Certification Board. Verify BACB Certification (last modified June 30, 2026). https://www.bacb.com/verify-certification
- Rainbow ABA Therapy. Insurance Coverage for ABA Therapy (accessed October 19, 2026). https://rainbowtherapy.org/insurance-coverage/
