2027 ICD-10-CM Diagnosis Code F06.71Mild neurocognitive disorder due to known physiological condition with behavioral disturbance

ICD-10-CM Codes›F01–F99›F01-F09›F06

ICD-10-CM F06.71
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

F06.71 is a billable ICD-10-CM diagnosis code for mild neurocognitive disorder due to known physiological condition with behavioral disturbance. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 884, 974 through 976. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 10 closely related codes. The code is not accepted as a principal diagnosis by the Medicare Code Editor. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neurocognitive disorders.

Code Identity

ICD-10-CM Code
F06.71
Billable Status
Yes — Valid for Submission
Code Describes
Mild neurocognitive disorder due to known physiological condition with behavioral disturbance
Short Description
Mild neurocog disord d/t known physiol cond with beh distrb
Parent Code
F06.7
Mild neurocognitive disorder due to known physiological condition

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF01-F09Mental disorders due to known physiological conditions
CategoryF06Other mental disorders due to known physiological condition
This CodeF06.71Mild neurocognitive disorder due to known physiological condition with behavioral disturbance

Code EditsBilling

Medicare Code Editor checks that affect claim validity for F06.71.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to F06.71: its own notes plus those printed at F06.7, F06, block F01-F09, and 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 F06 Other mental disorders due to known physiological condition applies to 12 codes
  • 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
From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • disorders of psychological development

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From F06.7 Mild neurocognitive disorder due to known physiological condition applies to 2 codes
From F06 Other mental disorders due to known physiological condition applies to 12 codes
  • unspecified dementia (F03.-)

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 F06 Other mental disorders due to known physiological condition applies to 12 codes
  • 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)
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)

Code First

The underlying condition named in the note is sequenced before this code.

From F06.7 Mild neurocognitive disorder due to known physiological condition applies to 2 codes
  • 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.-)
From F06 Other mental disorders due to known physiological condition applies to 12 codes
  • the underlying physiological condition

Notes

General instructions on how these codes are used.

From Block F01-F09 Mental disorders due to known physiological conditions applies to 91 codes
  • This block comprises a range of mental disorders grouped together on the basis of their having in common a demonstrable etiology in cerebral disease, brain injury, or other insult leading to cerebral dysfunction. The dysfunction may be primary, as in diseases, injuries, and insults that affect the brain directly and selectively; or secondary, as in systemic diseases and disorders that attack the brain only as one of the multiple organs or systems of the body that are involved.

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name F06.71, its category, or a range that includes it.

Applicable To 1

These notes mention F06.71.

  • O99.34 Other mental disorders complicating pregnancy, childbirth, and the puerperium
    Conditions in F01-F09, F20-F52 and F54-F99 names F01-F09, which includes this code

Excludes1 6

These codes carry an Excludes1 note naming F06.71: they are not reported together with it, unless the two conditions are unrelated.

  • F01.A Vascular dementia, mild
    mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-) names F06.7-, which includes this code
  • F02 Dementia in other diseases classified elsewhere
    mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-) names F06.7-, which includes this code
  • F02.A Dementia in other diseases classified elsewhere, mild
    mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-) names F06.7-, which includes this code
  • F03.A Unspecified dementia, mild
    mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-) names F06.7-, which includes this code
  • F09 Unspecified mental disorder due to known physiological condition
    mild neurocognitive disorder due to known physiological condition (F06.7-) names F06.7-, which includes this code
  • G31.84 Mild cognitive impairment of uncertain or unknown etiology
    mild neurocognitive disorder due to a known physiological condition (F06.7-) names F06.7-, which includes this code

Excludes2 2

These codes carry an Excludes2 note naming F06.71: its condition is not part of those codes, and both may be reported when the patient has both.

  • F63.1 Pyromania
    mental disorders due to known physiological condition (F01-F09) names F01-F09, which includes this code
  • F63.2 Kleptomania
    stealing in mental disorders due to known physiological condition (F01-F09) names F01-F09, which includes this code

Use Additional Code 8

These codes say to use an additional code from the note, and F06.71 is one of the codes named.

  • A81 Atypical virus infections of central nervous system
    mild neurocognitive disorder due to known physiological condition (F06.7-) names F06.7-, which includes this code
  • G10 Huntington's disease
    mild neurocognitive disorder due to known physiological condition (F06.7-) names F06.7-, which includes this code
  • G20 Parkinson's disease
    mild neurocognitive disorder due to known physiological condition (F06.7-) names F06.7-, which includes this code
  • G30 Alzheimer's disease
    mild neurocognitive disorder due to known physiological condition (F06.7-) names F06.7-, which includes this code
  • G31 Other degenerative diseases of nervous system, not elsewhere classified
    mild neurocognitive disorder due to known physiological condition (F06.7-) names F06.7-, which includes this code
  • G31.09 Other frontotemporal neurocognitive disorder
    code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-) names F06.7-, which includes this code
  • G31.83 Neurocognitive disorder with Lewy bodies
    code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-) names F06.7-, which includes this code
  • S06 Intracranial injury
    code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-) names F06.7-, 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 NVS011
Neurocognitive disorders
Default principal diagnosis: inpatient No · 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.

Code History & ChangesHistory

Replacement F06.71 replaces the following previously assigned code(s):

  • G31.84 - Mild cognitive impairment of uncertain or unknown etiology
  • G31.84 - Mild cognitive impairment, so stated
FY 2023AddedAdded to the ICD-10-CM code setEffective October 1, 2022.
FY 2024–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About F06.71Overview

Is F06.71 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report mild neurocognitive disorder due to known physiological condition with behavioral disturbance on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does F06.71 group to?

On inpatient claims, mild neurocognitive disorder due to known physiological condition with behavioral disturbance maps to MS-DRG 884, 974, 976, 975, with relative weights from 0.7879 to 3.0488 depending on complications. Higher weights mean higher Medicare reimbursement.

Is F06.71 a CC or MCC?

CMS lists F06.71 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 10 closely related codes in its exclusion list.

Can F06.71 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because mild neurocognitive disorder due to known physiological condition with behavioral disturbance describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Can F06.71 be reported with R41.81?

Not as a rule. The Excludes1 note at F06.7, which applies to F06.71, lists "age related cognitive decline (R41.81)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).