AutoICD API

F99

Billable

Mental disorder, not otherwise specified

Mental disorder, not otherwise specified

Status

Billable / Specific

Block

F99-F99

ICD-11 Mapping

1 equivalent

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Mental illness NOS

Includes

Conditions included under this code

  • disorders of psychological development

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

Excludes 2

Conditions not included here, but the patient may have both

ICD-11 Equivalents(1)

ICD-11 Equivalents

View full mapping

Corresponding ICD-11 codes from the WHO crosswalk mapping

6E8ZMental, behavioural or neurodevelopmental disorders, unspecifiedequivalentPrimary
Also Known As / Clinical Terms(185)

SNOMED CT

UMLS

Clinical Terms

  • Mental Illness
  • Impairment of psychological status
  • Female athlete triad
  • mental disease
  • disease mental
  • disorder psychological
  • Female athlete syndrome
  • Unspecified mental disorder (F99)
  • Impaired psychological status
  • diseases mental
  • psychiatric disorder
  • mental dysfunction
  • Mental Disorders
  • Psychological disorder in pregnancy
  • Axis I diagnosis
  • Psychological disorder during pregnancy
  • Brain fag
  • Psychiatric behavioral disability
  • Psychiatric Diseases
  • mental health disorder
  • Hypersomnia due to psychological disorder
  • Illness, Mental
  • Axis IV diagnosis
  • Deferred condition on Axis II
  • On severe mental illness register
  • Mental illness NOS
  • disorder mental health
  • Chronic mental disorder
  • psychiatric disorders
  • Identity disorder
  • Suspicion
  • disorder psychiatric
  • Mental disorder (disorder)
  • illness psychiatric
  • disorder health mental
  • disorder mental
  • Deferred condition on Axis III
  • Psychiatric Illnesses
  • Axis V diagnosis
  • psychological disorder
  • Hypersomnia due to mental disorder
  • psychiatric illness
  • MENTAL DIS
  • Mental disorder AND/OR culture bound syndrome
  • Psychological disorder NOS
  • Axis II diagnosis
  • Ghost sickness
  • Mal puesto
  • Insomnia disorder related to another mental disorder
  • Chronic mental illness
  • illnesses psychiatric
  • Mental disorders during pregnancy, childbirth and the puerperium
  • Identity problem
  • dysfunctions mental
  • Psychiatric treatment changed
  • Brujeria
  • Suspiciousness
  • Deferred diagnosis on Axis III
  • Insomnia due to mental disorder
  • Root work
  • Psych. treatment change
  • Mental disorder in infancy
  • Chronic mental disease
  • Psychiatric behavioral limitation
  • Mental disorder in mother complicating pregnancy
  • Deferred diagnosis on Axis II
  • Mental disorder in mother complicating childbirth
  • Hypersomnia disorder related to another mental disorder
  • Psych
  • Mental disorder during puerperium
  • Mental Illnesses
  • Psychiatric behavioural disability
  • dysfunctions psychological
  • Psychiatric Disease
  • Axis III diagnosis
  • Psychiatric behavioural limitation
  • mental disorder disorder
  • Mental disorder NOS
  • Cheshire cat syndrome
  • Psychiatric treatment started
  • Psychiatric disorder NOS
Frequently Asked Questions
What is the ICD-10 code for mental disorder, not otherwise specified?

The ICD-10-CM code for mental disorder, not otherwise specified is F99. The full clinical description is "Mental disorder, not otherwise specified". F99 is a billable/specific code that can be used on insurance claims and medical billing.

What does ICD-10 code F99 mean?

ICD-10-CM code F99 represents “Mental disorder, not otherwise specified”. It is classified under Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders and is a billable/specific code that can be used on a claim.

Is F99 a billable code?

Yes, F99 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.

What chapter is F99 in?

F99 is in Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders (codes F01-F99).

What codes cannot be used with F99?

F99 has Excludes1 notes indicating codes that cannot be used together with it, including: unspecified mental disorder due to known physiological condition (F09).

What SNOMED CT codes does F99 map to?

F99 maps to 30 SNOMED CT concepts: 899001, 56641006, 89016005, 34485008, 19480005, and 25 more. SNOMED CT is a clinical terminology used in electronic health records.

What are the UMLS CUIs for F99?

F99 is linked to 1 UMLS Concept Unique Identifier: C0004936. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

How does F99 relate to ICF functioning codes?

ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like mental disorder, not otherwise specified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.

What is the ICD-11 equivalent of F99?

F99 maps to the ICD-11 code: 6E8Z (Mental, behavioural or neurodevelopmental disorders, unspecified).

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.