ICD-10-CM 2027
ICD-10 code for specific isolated phobia
From the official ICD-10-CM alphabetic index entry “Phobia, phobic › specific (isolated)”. Page updated September 29, 2026.
About coding specific isolated phobia
The ICD-10-CM code for specific isolated phobia is F40.298 (Other specified phobia). The official index lists 16 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F40.298.
Within F40.29, choose F40.298 (Other specified phobia) only when documentation doesn't support a more specific option: Androphobia (F40.290) and Gynephobia (F40.291).
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 882 (Neuroses Except Depressive, relative weight 0.9952), 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 specific isolated phobia codes (official index)
- animal F40.218 — Other animal type phobia
- spiders F40.210 — Arachnophobia
- blood F40.230 — Fear of blood
- injection F40.231 — Fear of injections and transfusions
- injury F40.233 — Fear of injury
- men F40.290 — Androphobia
- natural environment F40.228 — Other natural environment type phobia
- thunderstorms F40.220 — Fear of thunderstorms
- situational F40.248 — Other situational type phobia
- bridges F40.242 — Fear of bridges
- closed in spaces F40.240 — Claustrophobia
- flying F40.243 — Fear of flying
- heights F40.241 — Acrophobia
- specified focus NEC F40.298 — Other specified phobia
- transfusion F40.231 — Fear of injections and transfusions
- women F40.291 — Gynephobia
Common questions about specific isolated phobia ICD-10 codes
What is the ICD-10 code for specific isolated phobia?
- F40.298 — Other specified phobia. More specific codes apply when the documentation supports them: F40.218, F40.210, F40.230, F40.231 and others below.
What is the ICD-10 code for animal specific isolated phobia?
- F40.218 — Other animal type phobia.
What is the ICD-10 code for blood specific isolated phobia?
- F40.230 — Fear of blood.
What is the ICD-10 code for injection specific isolated phobia?
- F40.231 — Fear of injections and transfusions.
What is the ICD-10 code for injury specific isolated phobia?
- F40.233 — Fear of injury.
What is the ICD-10 code for men specific isolated phobia?
- F40.290 — Androphobia.
What is the ICD-10 code for natural environment specific isolated phobia?
- F40.228 — Other natural environment type phobia.
Is F40.298 billable?
- Yes. F40.298 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F40.298 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F40.298 as a principal diagnosis.
Is F40.298 a CC or MCC?
- No. F40.298 is neither a CC nor an MCC under MS-DRG v44.0.