Who Can Perform a CDE? (Comprehensive Diagnostic Evaluation)

One of the biggest—and most damaging—misconceptions parents hear is this:
“Only a neurologist can do the evaluation.”
That’s wrong.

Let’s clear it up, plainly.

The short answer

A CDE (Comprehensive Diagnostic Evaluation) can be performed by multiple qualified professionals, as long as they are licensed, trained, and working within their clinical scope.

There is no single mandatory specialty.

Providers who can perform a CDE

Licensed Psychologist

This is one of the most common and widely accepted providers for a CDE.

A licensed psychologist can:

• Administer standardized tools (like the ADOS-2)
• Evaluate development, behavior, and adaptive skills
• Make a formal diagnosis
• Produce a comprehensive written report

👉 For many insurers and school systems, a psychologist-completed CDE is fully valid.

Developmental Pediatrician

These physicians specialize in early childhood development.

They can:

• Assess developmental milestones
• Diagnose Autism Spectrum Disorder and related conditions
• Coordinate medical and therapy recommendations

The reality: waitlists are often long.

Pediatric Neurologist

Yes, neurologists can perform a CDE—but they are not required for every child.

Their focus is primarily neurological. They are most appropriate when there are:

• Seizures
• Developmental regression
• Complex neurological concerns

👉 A neurologist is helpful in specific cases, not a universal requirement.

Neuropsychologist

Experts in brain–behavior relationships.

They can:

• Conduct very detailed evaluations
• Assess cognition, attention, memory, and learning
• Diagnose autism and co-occurring conditions

Often used when:

• The diagnosis is complex
• A deep cognitive profile is needed

Child Psychiatrist (in some cases)

Some child psychiatrists:

• Have specialized training in developmental diagnosis
• Are qualified to issue formal diagnoses

Not all do full CDEs—but some absolutely do.

Who cannot perform a CDE on their own

This part matters just as much:

• ❌ Schools (they evaluate for services, not medical diagnoses)
• ❌ Teachers
• ❌ RBTs or BCBAs (behavioral assessment ≠ diagnosis)
• ❌ Speech or occupational therapists (valuable input, not diagnostic authority)
• ❌ General pediatricians without specialty training

These professionals are important contributors, but they do not replace a clinical CDE.

What actually makes a CDE valid

More important than the job title is whether the evaluation is:

• Clinically comprehensive
• Performed by a licensed professional
• Within that provider’s scope of practice
• Accepted by insurance and schools
• Documented in a formal diagnostic report

If those boxes are checked, the CDE is legitimate.

The mistake that delays families

Telling parents:

“You must wait for a neurologist.”

That often leads to:

• Months of delays
• Therapy being put on hold
• Missed early-intervention windows

In many cases, a qualified provider is available much sooner.

Bottom line

A CDE does not belong to one specialty.
It belongs to the child—and to getting help on time.

If you’re stuck waiting for a specific provider, ask questions. There may be a valid, accepted, and faster path forward.

Time matters. Access matters. Accurate information matters.