ICD-10 Guide

F99

Name: ICD-10-CM Medical Diagnosis Codes
Creator: Centers for Medicare & Medicaid Services
License: https://www.cms.gov/medicare/coding/icd10

Billable

Mental disorder, not otherwise specified

BILLABLE STATUSYes

IMPLEMENTATION DATEOctober 1, 2015

LAST UPDATED08/26/2025

Code Description

ICD-10 F99 is a billable code used to indicate a diagnosis of mental disorder, not otherwise specified.

Key Diagnostic Point:

Mental disorder, not otherwise specified