2026 ICD-10-CM Diagnosis Code Z86.59Personal history of other mental and behavioral disorders

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z86

ICD-10-CM Z86.59
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z86.59 is a billable ICD-10-CM diagnosis code for personal history of other mental and behavioral disorders. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Personal history of other disease.

Code Identity

ICD-10-CM Code
Z86.59
Billable Status
Yes — Valid for Submission
Code Describes
Personal history of other mental and behavioral disorders
Short Description
Personal history of other mental and behavioral disorders
Same as the full description in the CMS dataset.
Parent Code
Z86.5
Personal history of mental and behavioral disorders

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategoryZ86Personal history of certain other diseases
This CodeZ86.59Personal history of other mental and behavioral disorders

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z86.59.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z86.59 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • H/O: anorexia nervosa
  • H/O: anxiety state
  • H/O: dementia
  • H/O: depression
  • H/O: psychiatric disorder
  • H/O: schizophrenia
  • History of agoraphobia
  • History of alcohol withdrawal delirium
  • History of alcohol withdrawal syndrome
  • History of attention deficit hyperactivity disorder
  • History of behavior problem
  • History of bulimia nervosa
  • History of confusion
  • History of delirium
  • History of dysthymia
  • History of eating disorder
  • History of emergence delirium
  • History of manic depressive disorder
  • History of mood disorder
  • History of neurodevelopmental disorder
  • History of neurosis
  • History of post-operative complication of surgical procedure
  • History of postoperative delirium
  • History of post-traumatic stress disorder
  • History of psychotic disorder
  • History of threatening violent behavior toward others
  • History of violent behavior toward others
  • Repeated self-induced vomiting

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.

    • History
      • personal (of)
        • behavioral disorders
    • History
      • personal (of)
        • disease or disorder (of)
          • mental NEC
    • History
      • personal (of)
        • mental disorder

Clinical ClassificationClinical

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

CCSR FAC030
Personal history of other disease
Default principal diagnosis: inpatient No · outpatient Yes

Clinical InformationClinical

  • Female-to-Male Transsexual Animal|Female-to-Male Transsexual

    an organism that was female at birth based on physical characteristics and has undergone hormonal therapy and/or surgical procedures in order to develop more male physical characteristics.

  • Female-to-Male Transsexual Phenotype|Female-to-Male Transsexual

    an individual who was female at birth based on physical characteristics and has undergone hormonal therapy and/or surgical procedures in order to develop more male physical characteristics.

  • Female-to-Male Transsexual|F-to-M|F2M|FTM|Female-to-Male Transsexual, Self-Report|TM|Trans Man|Transgender Male|Transgender male|Transman|Transsexual Male|Transsexual Man

    a person who was assigned to the female gender at birth based on physical characteristics but who self-identifies psychologically and emotionally as male.

  • Male-to-Female Transsexual Animal|Male-to-Female Transsexual

    an organism that was male at birth based on physical characteristics and has undergone hormonal therapy and/or surgical procedures in order to develop more female physical characteristics.

  • Male-to-Female Transsexual Phenotype|Male-to-Female Transsexual

    an individual who was male at birth based on physical characteristics and has undergone hormonal therapy and/or surgical procedures in order to develop more female physical characteristics.

  • Male-to-Female Transsexual|M-to-F|M2F|MTF|Male-to-Female Transsexual, Self-Report|TF|Trans Female|Trans Woman|Transgender Female|Transgender female|Transsexual Female|Transwoman

    a person who was assigned to the male gender at birth based on physical characteristics but who self-identifies psychologically and emotionally as female.

  • Transsexual

    a person who was assigned to one gender at birth based on physical characteristics but who self-identifies psychologically and emotionally as the other.

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 Z86.59 to ICD-9-CMHistory

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

ICD-9-CM
V11.8 Hx-mental disorder NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
V11.9 Hx-mental disorder 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 Z86.59Overview

Is Z86.59 (Personal history of mental and behavioral disorders) a billable code?

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

Can Z86.59 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because personal history of other mental and behavioral disorders describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z86.59 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for personal history of other mental and behavioral disorders on inpatient claims.

What is the ICD-9 equivalent of Z86.59?

Under the General Equivalence Mappings, personal history of other mental and behavioral disorders converts to ICD-9-CM V11.8 (hx-mental disorder NEC) and V11.9 (hx-mental disorder NOS). The mapping is approximate, so confirm the match fits the documentation.