F06.70 Mild neurocognitive disorder due to known physiological condition without behavioral disturbance

Billable ICD-10-CM code, FY2026.

Applicable to

• Mild neurocognitive disorder due to known physiological condition, NOS

Applies from F06 Other mental disorders due to known physiological condition

Includes

• mental disorders due to endocrine disorder
• mental disorders due to exogenous hormone
• mental disorders due to exogenous toxic substance
• mental disorders due to primary cerebral disease
• mental disorders due to somatic illness
• mental disorders due to systemic disease affecting the brain

Excludes1 (never code together)

• unspecified dementia (F03.-)

Excludes2 (not included here)

• delirium due to known physiological condition (F05)
• dementia as classified in F01-F02
• other mental disorders associated with alcohol and other psychoactive substances (F10-F19)

Code first

• the underlying physiological condition

Applies from F06.7 Mild neurocognitive disorder due to known physiological condition

Applicable to

• Mild neurocognitive impairment due to a known physiological condition

Excludes1 (never code together)

• age related cognitive decline (R41.81)
• altered mental status (R41.82)
• cerebral degeneration (G31.9)
• change in mental status (R41.82)
• cognitive deficits following (sequelae of) cerebral hemorrhage or infarction (I69.01-I69.11-, I69.21-I69.31-, I69.81- I69.91-)
• dementia (F01.-, F02.-, F03.-)
• mild cognitive impairment due to unknown or unspecified etiology (G31.84)
• neurologic neglect syndrome (R41.4)
• personality change, nonpsychotic (F68.8)

Code first

• the underlying physiological condition, such as:
• Alzheimer's disease (G30.-)
• human immunodeficiency virus [HIV] disease (B20)
• Huntington's disease (G10)
• Neurocognitive disorder with Lewy bodies (G31.83)
• other frontotemporal neurocognitive disorder (G31.09)
• Parkinson's disease (G20.-)
• systemic lupus erythematosus (M32.-)
• traumatic brain injury (S06.-)
• vitamin B deficiency (E53.-)

MS-DRG index

Defines the logic of DRG(s) 884 in MDC 19.

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Code annotations containing back-references to F06.70

Back-references to F06.7

• Use Additional: A81 Atypical virus infections of central nervous system ("mild neurocognitive disorder due to known physiological condition (F06.7-)")
• Type 1 Excludes: F01.A Vascular dementia, mild ("mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)")
• Type 1 Excludes: F02 Dementia in other diseases classified elsewhere ("mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)")
• Type 1 Excludes: F02.A Dementia in other diseases classified elsewhere, mild ("mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)")
• Type 1 Excludes: F03.A Unspecified dementia, mild ("mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)")
• Type 1 Excludes: F09 Unspecified mental disorder due to known physiological condition ("mild neurocognitive disorder due to known physiological condition (F06.7-)")
• Use Additional: G10 Huntington's disease ("mild neurocognitive disorder due to known physiological condition (F06.7-)")
• Use Additional: G20 Parkinson's disease ("mild neurocognitive disorder due to known physiological condition (F06.7-)")
• Use Additional: G30 Alzheimer's disease ("mild neurocognitive disorder due to known physiological condition (F06.7-)")
• Use Additional: G31 Other degenerative diseases of nervous system, not elsewhere classified ("mild neurocognitive disorder due to known physiological condition (F06.7-)")
• Use Additional: G31.09 Other frontotemporal neurocognitive disorder ("code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)")
• Use Additional: G31.83 Neurocognitive disorder with Lewy bodies ("code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)")
• Type 1 Excludes: G31.84 Mild cognitive impairment of uncertain or unknown etiology ("mild neurocognitive disorder due to a known physiological condition (F06.7-)")
• Use Additional: S06 Intracranial injury ("code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)")

Back-references to F06

• Type 2 Excludes: F63.1 Pyromania ("mental disorders due to known physiological condition (F01-F09)")
• Type 2 Excludes: F63.2 Kleptomania ("stealing in mental disorders due to known physiological condition (F01-F09)")

Diagnosis Index entries for F06.70

• Disorder (of) › mild neurocognitive › due to known physiological condition (without behavioral disturbance)
• Impaired, impairment (function) › mild neurocognitive › due to known physiological condition (without behavioral disturbance)

Nearby codes

• F06.32 Mood disorder due to known physiological condition with major depressive-like episode
• F06.33 Mood disorder due to known physiological condition with manic features
• F06.34 Mood disorder due to known physiological condition with mixed features
• F06.4 Anxiety disorder due to known physiological condition
• F06.7 Mild neurocognitive disorder due to known physiological condition
• F06.70 Mild neurocognitive disorder due to known physiological condition without behavioral disturbance (this code)
• F06.71 Mild neurocognitive disorder due to known physiological condition with behavioral disturbance
• F06.8 Other specified mental disorders due to known physiological condition