Find my starting point
California guide · All ages

Comprehensive Testing vs. a Diagnostic Consultation: Which Does Your Child Need?

Some evaluations are a few hours of interviews and observation; others include a day of standardized testing and a long report. Here's how they differ and which questions each can answer.

Written by the ChildEvaluation editorial team. Sources checked October 16, 2026. Editorial policy · Clinical standards

Two kinds of visits

  1. 1

    Diagnostic consultation

    Usually one or two visits with a developmental-behavioral pediatrician, child psychiatrist, or psychologist. It relies on history, observation, rating scales, and sometimes a structured observation tool. It can often answer a focused question, such as whether a young child meets criteria for autism or ADHD.

  2. 2

    Comprehensive psychological or neuropsychological testing

    Several hours of standardized tests, often across more than one day, covering areas like reasoning, language, memory, attention, academics, and daily living skills. It produces a detailed profile of strengths and needs and a written report with recommendations.

When each tends to fit

  • A consultation may be enough when the question is narrow and the child is young, or when you mainly need a diagnosis to start therapy.
  • Comprehensive testing tends to help when concerns overlap (for example, attention, learning, and anxiety), when school planning needs a detailed profile, or when earlier answers didn't fit.
  • Some practices do a consultation first and recommend testing only if it would change the plan.

Questions to ask before booking

  • Will this include standardized testing, and in which areas?
  • Who does the testing, and who writes the report?
  • Will I get a written report, and when?
  • Is there a feedback meeting to go over results?
  • Does the price or insurance estimate include the report and feedback?

Provider profiles on ChildEvaluation show whether a practice says it offers comprehensive testing, and mark it "Not yet confirmed" when we couldn't find out.

Sources

  1. California Department of Health Care Services: Behavioral Health Treatment
  2. California Education Code 56043: Special education timelines
General information, not legal or medical advice

Laws and program details change. Check with the agency named on this page, and talk to a qualified professional about your child. Spotted something out of date? Email hello@childevaluation.com.

Related California guides

  • Diagnosis vs. eligibilityIn California, a clinical diagnosis, special education eligibility, and regional center eligibility are three separate decisions made by different people using different rules.
  • Medi-Cal and evaluationsChildren and teens under 21 with full-scope Medi-Cal are covered for medically necessary screening, diagnostic, and treatment services under EPSDT. Here's how that applies to developmental, autism, and ADHD evaluations.
  • While you waitPrivate evaluation waitlists in the Bay Area can run for months. Free public routes have legal timelines, and much of what helps a child doesn't require a diagnosis.