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ICD-10-CM 2027 diagnosis code

F02.A4Dementia in other diseases classified elsewhere, mild, with anxiety

✓ Billable / specificCC — complication/comorbidityManifestation — not principal

F02.A4 is a valid, billable ICD-10-CM code for dementia in other diseases classified elsewhere, mild, with anxiety. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Dementia in other diseases classd elswhr, mild, with anxiety

Code last changed in FY2023 (effective October 1, 2022). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F02.A4

F02.A4 is the ICD-10-CM diagnosis code for dementia in other diseases classified elsewhere, mild, with anxiety. It belongs to category F02 (dementia in other diseases classified elsewhere), block F01-F09 (mental disorders due to known physiological conditions) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within F02.A (dementia in other diseases classified elsewhere, mild), F02.A4 is specifically for dementia in other diseases classified elsewhere, mild, with anxiety. Related codes cover without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety (F02.A0), with behavioral disturbance (F02.A1), with psychotic disturbance (F02.A2) and with mood disturbance (F02.A3).

Code first the underlying physiological condition, such as: Alzheimer's (G30.-), cerebral lipidosis (E75.4), Creutzfeldt-Jakob disease (A81.0-), epilepsy and recurrent seizures (G40.-) and 20 more.

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 884 (Organic Disturbances and Intellectual Disability, relative weight 1.6001), 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.

It is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.

It was added in FY2023, effective October 1, 2022.

Coding notes

Applicable toConditions and synonyms classified to this code
  • Major neurocognitive disorder in other diseases classified elsewhere, mild, with anxiety

Notes that apply from higher levels

Instructions written at a parent level also apply to F02.A4.

› From F02.A Dementia in other diseases classified elsewhere, mild
Excludes1
  • mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)
› From F02 Dementia in other diseases classified elsewhere
Includes
  • Major neurocognitive disorder in other diseases classified elsewhere
Excludes1
  • mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)
Excludes2
Code first
  • the underlying physiological condition, such as:
  • Alzheimer's (G30.-)
  • cerebral lipidosis (E75.4)
  • Creutzfeldt-Jakob disease (A81.0-)
  • epilepsy and recurrent seizures (G40.-)
  • hepatolenticular degeneration (E83.01)
  • human immunodeficiency virus [HIV] disease (B20)
  • Huntington's disease (G10)
  • hypercalcemia (E83.52)
  • hypothyroidism, acquired (E00-E03.-)
  • intoxications (T36-T65)
  • Jakob-Creutzfeldt disease (A81.0-)
  • multiple sclerosis (G35-)
  • neurocognitive disorder with Lewy bodies (G31.83)
  • neurosyphilis (A52.17)
  • niacin deficiency [pellagra] (E52)
  • other frontotemporal neurocognitive disorder (G31.09)
  • Parkinson's disease (G20.-)
  • Pick's disease (G31.01)
  • polyarteritis nodosa (M30.0)
  • prion disease (A81.9)
  • systemic lupus erythematosus (M32.-)
  • traumatic brain injury (S06.-)
  • trypanosomiasis (B56.-, B57.-)
  • vitamin B deficiency (E53.8)

Broader instructions also apply from F01-F09 Mental disorders due to known physiological conditions and Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to F02.A4.

Codes whose notes reference F02.A4

  • A81Use additional code
  • G10Use additional code
  • G20Use additional code
  • G30Use additional code
  • G31Use additional code

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2023 (effective 10/1/2022): Added
  • No changes since FY2023.

Common questions about F02.A4

Is F02.A4 billable?

Yes. F02.A4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F02.A4 be used as a principal diagnosis?

No. It is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.

Is F02.A4 a CC or MCC?

F02.A4 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does F02.A4 group to?

F02.A4 is used in the MS-DRG v44.0 logic for MS-DRG 884 (Organic Disturbances and Intellectual Disability). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.