If your toddler's pediatrician handed you a page of yes-or-no questions at the 18-month or 24-month visit, it was probably the M-CHAT-R/F. It is a common autism screening tool for toddlers. This guide explains what it is, how it is scored, and what a result means for your family in Florida, including the free next steps you can take on your own.
What is the M-CHAT-R/F?
The name stands for the Modified Checklist for Autism in Toddlers, Revised, with Follow-Up. Its authors, Diana Robins, Deborah Fein and Marianne Barton, describe it as "a 2-stage parent-report screening tool to assess risk for Autism Spectrum Disorder." Key facts from the official instructions:
- Age: it is "valid for screening toddlers between 16 and 30 months of age."
- Length: 20 yes-or-no questions that you answer about how your child usually behaves.
- Time: it "can be scored in less than two minutes."
- Cost: the authors make it available for free download for clinical, research and educational use from the official site, mchatscreen.com. It is copyrighted and must be used in full, with no items changed or left out.
- Languages: the official site lists translations into many languages, including Spanish. Check the translations page for your family's language.
The questions ask about everyday behavior. For example: if you point at something across the room, does your child look at it? Does your child point with one finger to show you something interesting? Does your child respond when you call their name? When you smile at your child, do they smile back? A few items ask about things like unusual finger movements near the eyes or getting upset at everyday noises.
The official form says: if you have seen your child do something a few times but they do not usually do it, answer "no." Answer for how your child usually is, not for their best day.
When is the M-CHAT-R/F used?
According to the CDC, the American Academy of Pediatrics recommends general developmental screening at the 9-, 18- and 30-month well-child visits, and the CDC says all children should be screened specifically for autism at the 18- and 24-month visits. Pediatricians commonly use the M-CHAT-R/F for that autism-specific check. The CDC also says additional screening might be needed for children at higher likelihood of autism, such as those with an autistic sibling, or whenever symptoms are present.
You do not have to wait for a scheduled visit. If you are worried at 20 months, ask for a screening at 20 months. See early signs of autism by age.
How is the M-CHAT-R/F scored?
Each answer that points toward autism likelihood counts one point. For most items a "no" counts; for three items (2, 5 and 12) a "yes" counts. The total puts a child in one of three bands. The official algorithm says:
| Total score | Likelihood band | What the algorithm says to do |
|---|---|---|
| 0 to 2 | Low | No further action unless other observation suggests risk. If the child is younger than 24 months, screen again after the second birthday. |
| 3 to 7 | Medium | Complete the Follow-Up interview for the items that scored. If the Follow-Up score is 2 or higher, the child has screened positive: refer for a diagnostic evaluation and an early intervention eligibility evaluation. If it is 0 or 1, the child has screened negative and should be rescreened at future well-child visits. |
| 8 to 20 | High | It is acceptable to skip the Follow-Up and refer right away for a diagnostic evaluation and an early intervention eligibility evaluation. |
What is the Follow-Up?
The Follow-Up is the "/F" in the name. A clinician (or trained staff) asks you structured questions about each item your child scored on, to get examples and check whether the answer really reflects a concern. The questions ask for concrete examples of what your child does in everyday situations. This step is there to reduce false alarms.
What does a positive screen mean?
It means your child should be looked at more closely. It does not mean your child is autistic. The authors are direct about this: the tool is designed to catch as many autistic children as possible, so "there is a high false positive rate, meaning that not all children who score at risk will be diagnosed with ASD." Even after the Follow-Up, "a significant number of the children who screen positive" will not be diagnosed with autism, but those children "are at high risk for other developmental disorders or delays, and therefore, evaluation is warranted for any child who screens positive."
The CDC puts it the same way: screening tools "do not provide conclusive evidence of developmental delays and do not result in diagnoses." A positive result should be followed by a thorough assessment.
In practice, a positive screen opens two doors at once:
- A diagnostic evaluation with a qualified clinician, which is what a health plan usually needs before it will pay for ABA. See how to get an autism diagnosis in Florida.
- An early intervention evaluation. In Florida, that is Early Steps for children under 3. Anyone can refer, including parents, online or at 1-800-218-0001. You do not need a diagnosis or a doctor's referral. See how to refer to Early Steps.
What does a negative screen mean?
It means the screen did not flag autism today. It does not rule it out. Screening tools miss some children, and some signs become clearer with age. If you are still worried, say so. Ask the doctor whether an evaluation is reasonable anyway, keep notes and short videos, and ask for a rescreen at the next visit. A child under 2 with a low score should be screened again after the second birthday, per the official instructions.
Can I fill out the M-CHAT-R/F at home?
The questionnaire is written for parents, and some pediatric offices have you complete it in the waiting room or online before the visit. The scoring and the Follow-Up interview are meant to be done with a clinician, who can also weigh what they see in the room and your child's history. If you complete it on your own, take the results to your child's doctor rather than reading them as an answer.
Is autism screening covered by insurance in Florida?
Usually, yes. Two rules work together:
- Federal preventive care rules. HealthCare.gov lists "autism screening for children at 18 and 24 months" among children's preventive services that are generally covered at no cost when provided by an in-network provider. Grandfathered plans are exempt from this rule.
- Florida's autism insurance law. Section 627.6686 requires the plans it covers (fully insured large-group plans, group HMOs and the state employee plan) to cover "well-baby and well-child screening for diagnosing the presence of autism spectrum disorder."
A full diagnostic evaluation is a different service and is usually billed differently, often with cost-sharing. See is autism screening covered by insurance in Florida for the details and what to ask your plan.
How Hope Center can help
If your child has screened positive, Hope Center for Behavior Change can talk you through next steps. We offer autism diagnostic evaluations through our clinical director with a supervising licensed psychologist, and our BCBAs provide ABA with no waitlist once a diagnosis and authorization are in place. We can also check your insurance benefits for free. Call 561-337-8865 or request a free consultation.