My Toddler Failed the M-CHAT Autism Screening
Medically reviewed by Dr. Emily Torres, PhD, CCC-SLP · Pediatric Speech-Language Pathologist
Content reviewed against published AAP, CDC, NIH guidelines
Last reviewed:
Behavioral development varies greatly from child to child. If you have noticed my toddler failed the m-chat autism screening, here is what you need to know.
The short answer
Failing the M-CHAT (Modified Checklist for Autism in Toddlers) does not mean your child has autism. It means additional evaluation is recommended. Many children who fail the initial M-CHAT screen do not receive an autism diagnosis after comprehensive evaluation. The important next step is to complete the follow-up interview (M-CHAT-R/F) with your pediatrician and, if indicated, pursue a developmental evaluation.
Key takeaways
- Failing the M-CHAT (Modified Checklist for Autism in Toddlers) does not mean your child has autism. It means additional evaluation is recommended. Many children who fail the initial M-CHAT screen do not receive an autism diagnosis after comprehensive evaluation. The important next step is to complete the follow-up interview (M-CHAT-R/F) with your pediatrician and, if indicated, pursue a developmental evaluation.
- Usually normal when: Your child failed the initial screen but passed the follow-up interview, suggesting a false positive
- Call your doctor if: Your child failed the M-CHAT with a high-risk score and has not been referred for evaluation
- Varies by age — see the age-by-age breakdown below
Parents everywhere have the same worry. You are doing the right thing by looking into it.
What Parents Should Know
According to AAP, CDC, NIH guidelines, failing the M-CHAT (Modified Checklist for Autism in Toddlers) does not mean your child has autism. It means additional evaluation is recommended. Many children who fail the initial M-CHAT screen do not receive an autism diagnosis after comprehensive evaluation. The important next step is to complete the follow-up interview (M-CHAT-R/F) with your pediatrician and, if indicated, pursue a developmental evaluation. At 16-20 months, the M-CHAT can be given starting at 16 months. A positive result at this young age has a higher false-positive rate. The follow-up interview narrows down which children need comprehensive evaluation. It is generally considered normal when your child failed the initial screen but passed the follow-up interview, suggesting a false positive. However, you should contact your pediatrician promptly if your child failed the M-CHAT with a high-risk score and has not been referred for evaluation.
Normal vs. Concerning
By Age
What to expect by age
16-20 months
The M-CHAT can be given starting at 16 months. A positive result at this young age has a higher false-positive rate. The follow-up interview narrows down which children need comprehensive evaluation.
20-24 months
This is the most common age for M-CHAT screening. A failed screen should be followed by the structured follow-up interview with your pediatrician. Based on results, a referral for comprehensive evaluation may be made.
24-30 months
After a failed M-CHAT and follow-up, a comprehensive developmental evaluation is recommended. This typically involves observation by specialists, standardized testing, and parent interviews. Evaluations may take several weeks to complete.
30-36 months
Whether or not a diagnosis is made, children identified through screening often benefit from early intervention services. You do not need to wait for a diagnosis to access services in many states.
3-5 years
Some children who failed the M-CHAT do not receive an autism diagnosis but may have other developmental differences that benefit from support. Others are diagnosed and benefit from early, intensive intervention.
What to Tell Your Pediatrician
- Describe when you first noticed my toddler failed the m-chat autism screening and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your child failed the M-CHAT and follow-up interview and needs a comprehensive evaluation.
- Mention if you are unsure about next steps after a failed screen.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Your child failed the initial screen but passed the follow-up interview, suggesting a false positive
- Your child failed on only 1 to 2 items and the follow-up interview clarified concerns
- Your child's development has progressed since the screening
- Your child failed the M-CHAT and follow-up interview and needs a comprehensive evaluation
- You are unsure about next steps after a failed screen
- You want to start services while waiting for evaluation
- Your child failed the M-CHAT with a high-risk score and has not been referred for evaluation
- Your child is losing skills while waiting for evaluation
What You Can Do at Home
- Keep track of when you notice my toddler failed the m-chat autism screening — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that your child failed the initial screen but passed the follow-up interview, suggesting a false positive — this is generally within the range of normal.
- At 16-20 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Respond consistently and calmly to your baby's behavior. Maintain predictable daily routines.
- While monitoring at home, seek immediate care if your child failed the M-CHAT with a high-risk score and has not been referred for evaluation.
Related Conditions
Worried About Autism - When and How to Screen
The AAP recommends autism screening at 18 and 24 months for all children, using the M-CHAT-R/F questionnaire. If you have concerns before these ages, you can request screening earlier. Early signs of autism may include limited eye contact, no pointing by 12 months, no words by 16 months, no pretend play by 18 months, or loss of any previously acquired skills. Trust your instincts as a parent and raise concerns with your pediatrician.
What Happens During an Autism Evaluation?
An autism evaluation typically involves multiple professionals including a developmental pediatrician, psychologist, or multidisciplinary team. The process includes parent interviews about developmental history, standardized observation tools like the ADOS-2, cognitive and language assessments, and review of development. The evaluation usually takes several hours and may be split across multiple sessions. Results lead to a clear diagnostic conclusion and recommendations.
Early Signs of Autism in Babies and Toddlers
Autism spectrum disorder (ASD) can sometimes be identified as early as 12-18 months, though most children are not diagnosed until age 2-3. Early signs include limited eye contact, not responding to their name, lack of pointing or showing, limited social smiling, and absence of pretend play. Having one or two of these signs does not mean your child has autism - many typically developing children share individual traits. However, a pattern of multiple social communication differences warrants evaluation. Early intervention, regardless of eventual diagnosis, consistently leads to the best outcomes.
Related Resources
Milestone Checklists by Age
Track your baby's developmental milestones from birth to 5 years with age-specific checklists.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is my toddler failed the m-chat autism screening normal?
When should I call the doctor about my toddler failed the m-chat autism screening?
When is my toddler failed the m-chat autism screening normal?
What causes my toddler failed the m-chat autism screening?
What should I mention to my pediatrician about my toddler failed the m-chat autism screening?
Is my toddler failed the m-chat autism screening normal at 16-20 months?
Is my toddler failed the m-chat autism screening normal at 20-24 months?
Should I go to the ER for my toddler failed the m-chat autism screening?
Does my toddler failed the m-chat autism screening go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss My Toddler Failed the M-CHAT Autism Screening.
Things to mention
- Describe when you first noticed my toddler failed the m-chat autism screening and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your child failed the M-CHAT and follow-up interview and needs a comprehensive evaluation.
- Mention if you are unsure about next steps after a failed screen.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your child failed the M-CHAT and follow-up interview and needs a comprehensive evaluation
- You are unsure about next steps after a failed screen
- You want to start services while waiting for evaluation
Urgent signs to report immediately
- Your child failed the M-CHAT with a high-risk score and has not been referred for evaluation
- Your child is losing skills while waiting for evaluation
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of my toddler failed the m-chat autism screening are normal. Talk to your pediatrician if your child failed the m-chat with a high-risk score and has not been referred for evaluation.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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Related Behavior Concerns
Worried About Autism - When and How to Screen
The AAP recommends autism screening at 18 and 24 months for all children, using the M-CHAT-R/F questionnaire. If you have concerns before these ages, you can request screening earlier. Early signs of autism may include limited eye contact, no pointing by 12 months, no words by 16 months, no pretend play by 18 months, or loss of any previously acquired skills. Trust your instincts as a parent and raise concerns with your pediatrician.
What Happens During an Autism Evaluation?
An autism evaluation typically involves multiple professionals including a developmental pediatrician, psychologist, or multidisciplinary team. The process includes parent interviews about developmental history, standardized observation tools like the ADOS-2, cognitive and language assessments, and review of development. The evaluation usually takes several hours and may be split across multiple sessions. Results lead to a clear diagnostic conclusion and recommendations.
Early Signs of Autism in Babies and Toddlers
Autism spectrum disorder (ASD) can sometimes be identified as early as 12-18 months, though most children are not diagnosed until age 2-3. Early signs include limited eye contact, not responding to their name, lack of pointing or showing, limited social smiling, and absence of pretend play. Having one or two of these signs does not mean your child has autism - many typically developing children share individual traits. However, a pattern of multiple social communication differences warrants evaluation. Early intervention, regardless of eventual diagnosis, consistently leads to the best outcomes.
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