2026 ICD-10-CM Diagnosis Code F65.9Paraphilia, unspecified

ICD-10-CM Codes›F01–F99›F60-F69›F65

ICD-10-CM F65.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F65.9 is a billable ICD-10-CM diagnosis code for paraphilia, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 887. Coders also document this condition as abnormal sexual behavior. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Miscellaneous mental and behavioral disorders/conditions.

Code Identity

ICD-10-CM Code
F65.9
Billable Status
Yes — Valid for Submission
Code Describes
Paraphilia, unspecified
Short Description
Paraphilia, unspecified
Same as the full description in the CMS dataset.
Parent Code
F65
Paraphilias

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF60-F69Disorders of adult personality and behavior
CategoryF65Paraphilias
This CodeF65.9Paraphilia, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal sexual behavior
  • Inappropriate sexual behavior
  • Male adolescent aberrant sex behavior
  • Paraphilia
  • Paraphilia involving non-consenting individual
  • Paraphilia involving solitary behavior or consenting individuals
  • Psychosexual disorder
  • Unusual solitary sexual activity

Tabular List NotesGuidance

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

Inclusion Terms

  • Paraphilic disorder, unspecified
  • Sexual deviation NOS

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 F65.9 to ICD-9-CMHistory

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

ICD-9-CM
302.9 Psychosexual dis NOS
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 F65.9Overview

What is the ICD-10 code for paraphilia, unspecified?

The ICD-10-CM code for paraphilia, unspecified is F65.9 (sometimes written as F659). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is F65.9 (Paraphilias) a billable code?

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

What MS-DRG does F65.9 group to?

When paraphilia, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 887 (other Mental Disorder Diagnoses), which carries a relative weight of 1.0709. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of F65.9?

Under the General Equivalence Mappings, paraphilia, unspecified converts to ICD-9-CM 302.9 (psychosexual dis NOS). The mapping is approximate, so confirm the match fits the documentation.