The 3 Types of ADHD Explained

When your child is struggling to focus, sit still, or manage emotions, it’s natural to wonder if ADHD might be the reason. But did you know there isn’t just one type of ADHD? In fact, there are three clinically recognized types, and understanding the difference between them is an important step toward getting the right support.

At RenaSer, we believe that informed families make empowered choices. If you’re just starting to explore the signs of ADHD or have already received a diagnosis, this guide will walk you through the three main types of ADHD, what they look like in everyday life, and how they’re diagnosed, especially here in Florida. We’ll also cover what treatment options are available and how ABA therapy may support your child’s growth and independence.

Let’s break it down together, one step at a time.

What is ADHD?

If your child seems to be constantly distracted, unusually active, or struggles with following directions, especially in situations where other children appear to manage just fine, it’s easy to feel confused or even frustrated. You might wonder, “Is this just a phase, or is something more going on?”

ADHD, or Attention-Deficit/Hyperactivity Disorder, is a neurodevelopmental condition that affects how the brain manages attention, behavior, and impulse control. It’s not caused by bad parenting or a lack of effort, and it doesn’t mean your child isn’t smart or capable. In fact, many children with ADHD are deeply curious and creative. They simply process and respond to the world in a different way.

Across the United States, ADHD is one of the most commonly diagnosed behavioral conditions in children. According to the CDC, around 6 million children have been diagnosed with ADHD. Here in Florida, thousands of families face similar concerns each year, often starting with the same questions you may be asking now.

While every child is unique, ADHD tends to show up in consistent patterns. That’s why it is classified into three different types, each with its own set of characteristics. Understanding which type most closely matches your child’s behavior is the first step toward finding effective support.

In the next section, we’ll explore these types in detail, including how they present and what steps parents can take to move forward with clarity and confidence.

Type 1: Predominantly Inattentive Presentation

Children with this type of ADHD are often the ones who get overlooked. Instead of drawing attention through constant movement or impulsive behavior, they may seem quiet, distracted, or “off in their own world.” You might notice that your child struggles to follow instructions, forgets things easily, or has trouble staying focused on a task even when it’s something they enjoy. Homework may go unfinished, routines might be inconsistent, and they could have a hard time keeping track of belongings.

This pattern can sometimes be mistaken for laziness or defiance, but it’s rooted in real challenges with attention regulation. In school, these children may seem disengaged, even though they are often trying their best to keep up.

Diagnosing this type of ADHD usually involves a detailed assessment by a licensed professional, including behavior checklists, interviews with parents and teachers, and a review of how long symptoms have been present. To be classified under this type, symptoms must occur regularly for at least six months and interfere with daily functioning at school, home, or in social settings.

Treatment often includes a combination of behavioral support and sometimes medication, depending on the severity. At RenaSer, our ABA services can help children build focus and organizational skills through structured routines and positive reinforcement, all delivered in a familiar environment where they feel comfortable.

Type 2: Predominantly Hyperactive-Impulsive Presentation

This type of ADHD tends to be more outwardly visible. Children with hyperactive-impulsive presentation may be constantly in motion, speak out of turn, interrupt frequently, or struggle to wait their turn. They might climb on furniture, race from one activity to another, or appear as if they are "driven by a motor."

While their energy can sometimes be seen as enthusiasm or playfulness, these behaviors often create challenges in structured environments like classrooms or during group activities. Parents might feel exhausted trying to keep up, and children may experience frequent reminders or discipline at school for behaviors they have trouble controlling.

Diagnosis is based on observing a consistent pattern of hyperactive and impulsive behaviors that go beyond what is typical for the child’s age and development. As with all ADHD types, these behaviors must be present in more than one setting and must interfere with daily life.

Treatment for this type of ADHD may include medication, behavior therapy, or both. At RenaSer, we help families by creating personalized behavior plans that focus on reducing impulsivity, increasing self-control, and building daily routines that work for both the child and their caregivers. Our goal is to help children learn how to regulate their energy and behaviors in a way that helps them thrive at home and at school.

Type 3: Combined Presentation

Some children show signs of both inattentiveness and hyperactivity-impulsivity. This is known as the combined presentation and is the most commonly diagnosed type of ADHD. These children may struggle to focus and complete tasks while also displaying high energy and impulsive behavior. One moment they may be distracted or daydreaming, and the next they might be acting out or disrupting others unintentionally.

The combination of symptoms can make daily life especially overwhelming—for both children and their families. In school, they may fall behind academically while also receiving frequent behavioral corrections. At home, routines can feel like a constant battle.

To diagnose combined presentation, a clinician must identify at least six symptoms of inattention and six symptoms of hyperactivity-impulsivity that are present for at least six months. The evaluation includes input from multiple sources to get a full picture of how the child functions across environments.

Support for children with combined presentation often requires a comprehensive approach. Medication may be part of the plan, but behavioral strategies are key to helping a child succeed in their daily life. At RenaSer, we specialize in breaking complex goals into manageable steps, using ABA therapy to teach coping skills, improve communication, and reduce disruptive behaviors. Our therapists work closely with families to make sure the progress is meaningful, sustainable, and built around the child’s natural strengths.

ADHD Diagnosis

Getting an ADHD diagnosis can feel overwhelming at first, especially when you're trying to make sense of what your child is experiencing. You may be noticing the signs: difficulty focusing, impulsive actions, struggles in school, but figuring out where to start, who to talk to, and what steps to take isn’t always clear.

In Florida, a diagnosis for ADHD typically begins with a visit to a pediatrician, psychologist, or psychiatrist who is trained in evaluating developmental and behavioral conditions. These professionals use a combination of interviews, behavioral checklists, and direct observation to understand how symptoms show up across different settings, such as home, school, and social situations.

To receive a formal diagnosis, symptoms must have been present for at least six months and must clearly interfere with your child’s daily life. Evaluators will also consider your child’s developmental stage and rule out other conditions that might look similar, such as anxiety or learning disabilities.

At RenaSer, we know that no two children experience ADHD in the same way. That’s why we offer comprehensive assessments and collaborate with families, schools, and other providers to ensure every piece of the puzzle is understood. Whether your child is just beginning to show signs of inattention or already has a diagnosis, our team is here to help you navigate the next steps with clarity and compassion.

With services available in the clinic, at home, and in school, we’re able to meet your child where they are and build the kind of environment that helps them feel secure and supported. Whether your child needs help adjusting to a classroom routine, managing behavior at home, or building social skills in a structured setting, we’re ready to guide you through a path that fits your family’s unique needs.

Treatment Options Available in Florida

For many children with ADHD, medication can be a helpful part of their treatment plan. In Florida, pediatricians, psychiatrists, and neurologists may prescribe stimulant or non-stimulant medications to help regulate attention, reduce hyperactivity, or improve impulse control. While medication isn’t the right solution for every child, it can provide some relief from symptoms and open the door to more successful learning and behavior strategies.

However, medication alone is rarely enough. Most families find the best results when medication is combined with behavioral support. That’s where therapy centers like RenaSer come in. Our ABA-based approach focuses on teaching daily living skills, improving emotional regulation, and helping children better manage the demands of school, home, and social life.

Support Groups and Educational Programs

ADHD doesn’t just affect the child, it affects the whole family. That’s why connecting with other parents, caregivers, and educators can be incredibly valuable. Across Florida, there are numerous ADHD support groups that offer a safe space to share experiences, exchange tips, and feel understood by others who’ve walked a similar path.

Educational programs and workshops are another powerful tool. These programs often teach parents how to use positive reinforcement, structure routines, and advocate effectively within the school system. Many school districts in Florida provide resources such as 504 Plans or Individualized Education Programs (IEPs), which can help ensure your child receives accommodations and support in the classroom.

At RenaSer, we work closely with families and educators to help bridge the gap between therapy and daily environments. Whether it’s offering guidance on school accommodations or collaborating with teachers, our goal is to build a circle of support around your child that goes far beyond the therapy session.

Frequently Asked Questions

What is the difference between ADHD and ADD?
ADD is an outdated term that used to describe what we now call ADHD, Inattentive Type. Today, all forms fall under the broader diagnosis of ADHD, which includes inattentive, hyperactive-impulsive, and combined presentations.

Can a child have ADHD without being hyperactive?
Yes. Many children with ADHD are not overly active or impulsive. If your child has trouble focusing or staying organized but is not physically hyper, they may have the inattentive presentation of ADHD.

Is ABA therapy effective for children with ADHD?
Yes. While ABA therapy is often associated with autism, many of its principles are effective for children with ADHD, especially when it comes to teaching focus, following instructions, and improving self-regulation.

Does RenaSer require a diagnosis before starting therapy?
We recommend starting with a formal diagnosis to create the most accurate treatment plan. However, if you’re unsure whether your child qualifies or if you need help with the evaluation process, our team can guide you step-by-step.

Do you work with schools and educators?
Absolutely. Our team is experienced in collaborating with school staff to support your child’s development in academic settings. We provide observations, strategy planning, and consistent communication to help your child succeed at school.

Conclusion

If you're a parent in Florida trying to understand ADHD, you're not alone and you don't have to figure everything out on your own. Whether your child shows signs of inattention, hyperactivity, or a combination of both, understanding the different types of ADHD is the first step toward meaningful progress.

At RenaSer, we’re here to support you through each step of the journey. From diagnosis guidance to customized therapy sessions in clinic, at home, or in school, our goal is to help children build lasting skills. ADHD may bring challenges, but with the right support, it can also reveal incredible strengths.

If you’re ready to take the next step or still have questions, our team is here to help you find answers and start building a plan that works for your family.