Toddler Not Waving Goodbye? Understanding Autism Signs and What to Do Next

In short: Not waving goodbye in toddlers can be an early sign of autism, though some children develop this skill later. While it's not a definitive diagnosis, paired with other signs it may prompt an evaluation. A free service like Get ABA Therapy can help you find vetted BCBA-led providers and navigate insurance coverage, including Medicaid, for early intervention.
Key takeaways
- Waving goodbye is a social-communication milestone typically emerging between 9-15 months; delayed or absent waving can be an early red flag for autism.
- Missing this gesture alone does not diagnose autism-look for clusters of behaviors like limited eye contact, lack of pointing, or delayed speech.
- Early intervention is critical; ABA therapy can help build communication and social skills in toddlers.
- Most insurance plans, including Medicaid, cover ABA therapy for autism; a free matching service can help you find an in-network provider.
Why Waving Goodbye Matters in Toddler Development
Waving goodbye is a social milestone that usually appears between 9 and 15 months of age. It's not just a cute gesture-it shows that a child is beginning to understand social communication, imitation, and joint attention. When a toddler waves, they are intentionally engaging with another person, often with eye contact and a smile.
As a parent, you might notice your little one copying your wave before they can say "bye-bye." This back-and-forth interaction is a building block for later language and social skills. But what if your toddler hasn't started waving yet, or doesn't seem to respond when others wave? While every child develops at their own pace, a persistently absent wave can sometimes be one of the early signs of autism spectrum disorder (ASD).

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Is Not Waving a Sign of Autism?
A single missed milestone is rarely a cause for alarm. Many children who wave late catch up without any developmental concerns. However, research shows that a lack of gesturing-including waving, pointing, and showing objects-is more common in toddlers later diagnosed with autism. The key is to look at the bigger picture.
Other Early Social-Communication Red Flags
- Limited or inconsistent eye contact
- Not responding to their name by 12 months
- Lack of pointing to request or share interest
- Not showing objects to others
- Limited facial expressions or imitation of others
If your toddler isn't waving and also shows several of these behaviors, it may be worth discussing with your pediatrician. Early detection leads to early intervention, which can make a tremendous difference.
What to Do If You're Concerned
Trust your instincts. You know your child best. The first step is to talk to your pediatrician about a developmental screening. In the United States, the American Academy of Pediatrics recommends autism-specific screening at 18 and 24 months. Your doctor can use tools like the M-CHAT (Modified Checklist for Autism in Toddlers) to assess risk.
Seeking an Evaluation
If screening suggests a concern, a formal evaluation by a developmental pediatrician, child psychologist, or other specialist is the next step. This evaluation is essential for obtaining a diagnosis and accessing services. Early intervention programs, often available through your state or local school district, can start before a formal diagnosis is complete.

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Early Intervention and ABA Therapy for Toddlers
Once a need is identified, early intervention can begin. Applied Behavior Analysis (ABA) therapy is a well-researched, evidence-based approach that helps young children build critical skills, including communication, social interaction, and daily living routines. ABA is not about forcing a child to wave; it's about teaching foundational skills in a positive, natural way.
How ABA Supports Toddlers Who Aren't Waving
A Board Certified Behavior Analyst (BCBA) designs a program tailored to your child's unique needs. For a toddler missing gestural milestones, therapy might focus on:
- Increasing eye contact and joint attention
- Modeling and reinforcing imitation of simple actions (like waving)
- Teaching alternative communication methods (signs, pictures, speech)
- Building comfort with social interactions in safe, play-based settings
ABA is most effective when started early-ideally before age 3. The skills learned during this window can dramatically improve a child's long-term outcomes.
Costs, Insurance, and Medicaid Coverage for ABA Therapy
The cost of ABA therapy can range from $50 to $150 per hour, but for many families, insurance significantly reduces the burden. Under the Affordable Care Act, most private insurance plans must cover behavioral health treatments for autism, including ABA. Additionally, all 50 states require some form of insurance coverage for autism services, though specifics vary.
Medicaid typically covers ABA therapy for children with an autism diagnosis. If your child is eligible for Medicaid or the Children's Health Insurance Program (CHIP), you likely have access to these services. The key is finding a provider who accepts your plan and has availability. This is where a free matching service like Get ABA Therapy helps.

How Get ABA Therapy Connects You With Vetted Providers
Get ABA Therapy is a completely free service designed to simplify the search for qualified, BCBA-led ABA providers. Instead of calling clinic after clinic, you fill out a simple form about your child's needs and your insurance coverage. The service then matches you with providers in your area who have availability and accept your plan.
This can save weeks of frustrating research. Whether your toddler needs evaluation support, early intervention, or ongoing ABA, the team works with a network of vetted professionals who understand the unique needs of young children and their families.
Common Mistakes to Avoid When Waiting for a Wave
Parents often worry about what they might be doing wrong. Here are a few pitfalls to steer clear of:
- Waiting too long. If you have a concern, act now. Early intervention is time-sensitive.
- Comparing your child too closely to others. Development varies, but clusters of delays are more telling than a single missed milestone.
- Ignoring your gut. If you think something is off, get a professional opinion. Many parents later wish they had spoken up sooner.
- Thinking ABA is only for older children. High-quality ABA is designed for toddlers too, using play and natural environments.
Above all, be kind to yourself. Noticing a potential delay is the first step toward getting support. You don't have to navigate this alone.
Next Steps: From Concern to Action
To summarize, here's a clear path forward:
- Document your observations-what your toddler does and doesn't do.
- Schedule a pediatrician appointment to discuss a developmental screening.
- If indicated, pursue a formal evaluation.
- Explore early intervention services through your state.
- Consider ABA therapy and use a free matching service to find a BCBA-led provider who accepts your insurance.
Remember, a toddler not waving goodbye is just one piece of the puzzle. With the right support and early action, many children make remarkable progress. The most important thing is to take that first step today.