2026 ICD-10-CM Diagnosis Code F66Other sexual disorders

ICD-10-CM Codes›F01–F99›F60-F69›F66

ICD-10-CM F66
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F66 is a billable ICD-10-CM diagnosis code for other sexual disorders. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Miscellaneous mental and behavioral disorders/conditions.

Code Identity

ICD-10-CM Code
F66
Billable Status
Yes — Valid for Submission
Code Describes
Other sexual disorders
Chapter
F60-F69
Disorders of adult personality and behavior

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF60-F69Disorders of adult personality and behavior
CategoryF66Other sexual disorders
This CodeF66Other sexual disorders

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal development of sexuality
  • Abnormal sexual state
  • Abnormal sexual state and development
  • Chondrodysplasia with disorder of sex development syndrome
  • Difficulty expressing intimacy
  • Dissatisfied with sexual relationship
  • Ego-dystonic sexual orientation
  • Ego-syntonic sexual orientation
  • Erotic feeling
  • Erotic interest - finding
  • Female hypererotism
  • Increased libido
  • Inhibited sexual desire
  • Lecherism
  • Libido - finding
  • Male hypererotism
  • Obscene thoughts
  • Overtly sexualized behavior in childhood
  • Pure gonadal dysgenesis
  • Pure gonadal dysgenesis 46,XY
  • Sexual exposure
  • Sexual frustration
  • Sexual neglect
  • Sexual nondevelopment
  • Sexual overexposure
  • Sexual relationship problem
  • Sexual relationship problem due to gender identity confusion
  • Sexual relationship problem due to sexual orientation confusion
  • Sexual value system confusion
  • Sexuality related problem
  • Sexualized behavior
  • Sexually disinhibited behavior
  • Sexually obscene thoughts
  • Uncontrollable sexual urge

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Sexual maturation disorder
  • Sexual relationship disorder

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disorder(of)
      • gender-identity or -role
        • effect on relationship
    • Disorder(of)
      • gender-identity or -role
        • uncertainty
    • Disorder(of)
      • psychological
        • associated with
          • sexual
            • development
    • Disorder(of)
      • psychological
        • associated with
          • sexual
            • relationship
    • Disorder(of)
      • psychosexual
        • development
    • Disorder(of)
      • relationship
        • due to sexual orientation
    • Disorder(of)
      • sexual
        • maturation
    • Disorder(of)
      • sexual
        • relationship
    • Problem(with) (related to)
      • marital
        • involving
          • gender identity
    • Problem(with) (related to)
      • psychosexual (development)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD013
Miscellaneous mental and behavioral disorders/conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Mental Disorders

Mental disorders (or mental illnesses) are conditions that affect your thinking, feeling, mood, and behavior. They may happen over a short period of time or come and go. Some can be chronic (long-lasting). They can affect your ability to relate to others and function each day..

The full article covers:

  • What are mental disorders?
  • What are some types of mental disorders?
  • What causes mental disorders?
  • Who is at risk for mental disorders?
  • How are mental disorders diagnosed?
  • What are the treatments for mental disorders?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F66 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
302.89 Psychosexual dis NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F66Overview

Is F66 (Other sexual disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other sexual disorders on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of F66?

Under the General Equivalence Mappings, other sexual disorders converts to ICD-9-CM 302.89 (psychosexual dis NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.