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v1.0.0
ICD-10 Guide
DiagnosesAdhd Unspecified

Adhd Unspecified

ICD-10 Coding for ADHD Unspecified(F90.9)

PRIMARY SPECIALTYPediatrics
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Adhd Unspecified?
Essential facts and insights about ADHD Unspecified

Key Clinical Considerations:

  • Presence of six or more symptoms of inattention for children up to age 16, or five or more for adolescents 17 and older and adults.
  • Symptoms of inattention have been present for at least 6 months, and they are inappropriate for developmental level.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Detailed patient history including onset and duration of symptoms.
  • Specific examples of how symptoms are impairing the patient's social, academic, or occupational functioning.

Coding Guidelines

Usage Guidelines & Examples

  • F90.9 is used for unspecified ADHD, when the type is not documented. Other codes in the F90 category specify type, such as F90.0 for predominantly inattentive type.
  • F90.9 should not be confused with F98.8, which is for other specified behavioral and emotional disorders with onset usually occurring in childhood and adolescence.

Code Exclusions

Important Exclusions

  • Hyperkinetic disorder (F90.0-F90.1)
  • Conduct disorders (F91.-)

Related ICD-10 Codes

Primary Codes
F90.9
Attention-deficit hyperactivity disorder, unspecified type
Ancillary Codes
Z00.121
F90.9
for routine ADHD monitoring.
Differential Codes
F90.0
F90.0
when inattention symptoms are predominant.
F90.1
F90.1
when hyperactivity-impulsivity symptoms are predominant.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Pediatrics

Specialty Applications

  • ADHD not otherwise specified
  • ADHD without mention of type

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Patient presents with symptoms consistent with ADHD, including [specific symptoms].

Template 2

Symptoms have been present for [time period] and are causing significant impairment in [specific areas of functioning].

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What is the age limit for diagnosing ADHD?

While ADHD is most commonly diagnosed in children, it can also be diagnosed in adults. The key is that symptoms must have been present since childhood.

When should this code be used?

This code should be used when the patient has been diagnosed with ADHD, but the type is not specified in the documentation.