ICD-10-CM 2027
ICD-10 code for neurosis
From the official ICD-10-CM alphabetic index entry “Neurosis, neurotic”. Page updated September 29, 2026.
About coding neurosis
The ICD-10-CM code for neurosis is F48.9 (Nonpsychotic mental disorder, unspecified). The official index lists 60 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F48.9.
Within F48, choose F48.9 (Nonpsychotic mental disorder, unspecified) only when documentation doesn't support a more specific option: Depersonalization-derealization syndrome (F48.1), Pseudobulbar affect (F48.2) and other specified nonpsychotic mental disorders (F48.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 880 (Acute Adjustment Reaction and Psychosocial Dysfunction, relative weight 0.9306), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific neurosis codes (official index)
- anankastic F42.8 — Other obsessive-compulsive disorder
- anxiety (state) F41.1 — Generalized anxiety disorder
- panic type F41.0 — Panic disorder [episodic paroxysmal anxiety]
- asthenic F48.8 — Other specified nonpsychotic mental disorders
- bladder F45.8 — Other somatoform disorders
- cardiac (reflex) F45.8 — Other somatoform disorders
- cardiovascular F45.8 — Other somatoform disorders
- character F60.9 — Personality disorder, unspecified
- colon F45.8 — Other somatoform disorders
- compensation F68.10 — Factitious disorder imposed on self, unspecified
- compulsive, compulsion F42.8 — Other obsessive-compulsive disorder
- conversion F44.9 — Dissociative and conversion disorder, unspecified
- craft F48.8 — Other specified nonpsychotic mental disorders
- cutaneous F45.8 — Other somatoform disorders
- depersonalization F48.1 — Depersonalization-derealization syndrome
- depressive (reaction) (type) F34.1 — Dysthymic disorder
- environmental F48.8 — Other specified nonpsychotic mental disorders
- excoriation L98.1 — Factitial dermatitis
- fatigue F48.8 — Other specified nonpsychotic mental disorders
- functional
- gastric F45.8 — Other somatoform disorders
- gastrointestinal F45.8 — Other somatoform disorders
- heart F45.8 — Other somatoform disorders
- hypochondriacal F45.21 — Hypochondriasis
- hysterical F44.9 — Dissociative and conversion disorder, unspecified
- incoordination F45.8 — Other somatoform disorders
- larynx F45.8 — Other somatoform disorders
- vocal cord F45.8 — Other somatoform disorders
- intestine F45.8 — Other somatoform disorders
- larynx (sensory) F45.8 — Other somatoform disorders
- hysterical F44.4 — Conversion disorder with motor symptom or deficit
- mixed NEC F48.8 — Other specified nonpsychotic mental disorders
- musculoskeletal F45.8 — Other somatoform disorders
- obsessional F42.8 — Other obsessive-compulsive disorder
- obsessive-compulsive F42.8 — Other obsessive-compulsive disorder
- occupational F48.8 — Other specified nonpsychotic mental disorders
- ocular NEC F45.8 — Other somatoform disorders
- organ
- pharynx F45.8 — Other somatoform disorders
- phobic F40.9 — Phobic anxiety disorder, unspecified
- posttraumatic (situational) F43.10 — Post-traumatic stress disorder, unspecified
- acute F43.11 — Post-traumatic stress disorder, acute
- chronic F43.12 — Post-traumatic stress disorder, chronic
- psychasthenic (type) F48.8 — Other specified nonpsychotic mental disorders
- railroad F48.8 — Other specified nonpsychotic mental disorders
- rectum F45.8 — Other somatoform disorders
- respiratory F45.8 — Other somatoform disorders
- rumination F45.8 — Other somatoform disorders
- sexual F65.9 — Paraphilia, unspecified
- situational F48.8 — Other specified nonpsychotic mental disorders
- social F40.10 — Social phobia, unspecified
- generalized F40.11 — Social phobia, generalized
- specified type NEC F48.8 — Other specified nonpsychotic mental disorders
- state F48.9 — Nonpsychotic mental disorder, unspecified
- with depersonalization episode F48.1 — Depersonalization-derealization syndrome
- stomach F45.8 — Other somatoform disorders
- traumatic F43.10 — Post-traumatic stress disorder, unspecified
- acute F43.11 — Post-traumatic stress disorder, acute
- chronic F43.12 — Post-traumatic stress disorder, chronic
- vasomotor F45.8 — Other somatoform disorders
- visceral F45.8 — Other somatoform disorders
- war F48.8 — Other specified nonpsychotic mental disorders
Common questions about neurosis ICD-10 codes
What is the ICD-10 code for neurosis?
- F48.9 — Nonpsychotic mental disorder, unspecified. More specific codes apply when the documentation supports them: F42.8, F41.1, F41.0, F48.8 and others below.
What is the ICD-10 code for anankastic neurosis?
- F42.8 — Other obsessive-compulsive disorder.
What is the ICD-10 code for anxiety neurosis?
- F41.1 — Generalized anxiety disorder.
What is the ICD-10 code for asthenic neurosis?
- F48.8 — Other specified nonpsychotic mental disorders.
What is the ICD-10 code for bladder neurosis?
- F45.8 — Other somatoform disorders.
What is the ICD-10 code for cardiac neurosis?
- F45.8 — Other somatoform disorders.
What is the ICD-10 code for cardiovascular neurosis?
- F45.8 — Other somatoform disorders.
Is F48.9 billable?
- Yes. F48.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F48.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F48.9 as a principal diagnosis.
Is F48.9 a CC or MCC?
- No. F48.9 is neither a CC nor an MCC under MS-DRG v44.0.