2027 ICD-10-CM Diagnosis Code F48.9Nonpsychotic mental disorder, unspecified

ICD-10-CM Codes›F01–F99›F40-F48›F48

ICD-10-CM F48.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

F48.9 is a billable ICD-10-CM diagnosis code for nonpsychotic mental disorder, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 880. Coders also document this condition as high level of neuroticism. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Miscellaneous mental and behavioral disorders/conditions.

Code Identity

ICD-10-CM Code
F48.9
Billable Status
Yes — Valid for Submission
Code Describes
Nonpsychotic mental disorder, unspecified
Short Description
Nonpsychotic mental disorder, unspecified
Same as the full description in the CMS dataset.
Parent Code
F48
Other nonpsychotic mental disorders

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF40-F48Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
CategoryF48Other nonpsychotic mental disorders
This CodeF48.9Nonpsychotic mental disorder, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • High level of neuroticism
  • Impaired judgement
  • Intellectual faculties - finding
  • Level of neuroticism - finding
  • Mental health problem
  • Neurosis
  • Neurotic condition, insight present
  • Poor insight into neurotic condition
  • Tension

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to F48.9: its own notes plus those printed at Chapter 5. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • disorders of psychological development

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Neurosis NOS

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name F48.9, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming F48.9: its condition is not part of those codes, and both may be reported when the patient has both.

  • F93.0 Separation anxiety disorder of childhood
    nonpsychotic mental disorders (F40-F48) names F40-F48, which includes this code

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 F48.9 to ICD-9-CMHistory

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

ICD-9-CM
300.9 Nonpsychotic disord NOS
Approximate The match is approximate rather than exact.
ICD-9-CM
V40.2 Mental problems NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
V40.9 Mental/behavior prob 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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About F48.9Overview

What is the ICD-10 code for nonpsychotic mental disorder, unspecified?

The ICD-10-CM code for nonpsychotic mental disorder, unspecified is F48.9 (sometimes written as F489). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is F48.9 (Other nonpsychotic mental disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report nonpsychotic mental disorder, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does F48.9 group to?

When nonpsychotic mental disorder, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 880 (acute Adjustment Reaction and Psychosocial Dysfunction), which carries a relative weight of 0.9306. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of F48.9?

Under the General Equivalence Mappings, nonpsychotic mental disorder, unspecified converts to ICD-9-CM 300.9 (nonpsychotic disord NOS), V40.2 (mental problems NEC), and V40.9 (mental/behavior prob NOS). The mapping is approximate, so confirm the match fits the documentation.