Skip to main content

F02 ICD-10-CM Code: Dementia in other diseases classified elsewhere

Compare with another code for F02Check this code on a claim

Billing Status: NO. This is a non-billable ICD-10-CM code: report a more specific billable code beneath it.

Coding at a Glance

Tabular directives
1 inclusion term · 1 Excludes1 · 2 Excludes2 · 25 code-first instructions

Category · FY2027A non-billable heading in the tabular list: report a more specific code beneath it.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too; the Instructions section marks which is which.

Code firstSequence the underlying condition before this code
  • the underlying physiological condition, such as:
  • Alzheimer's (G30.-)
  • cerebral lipidosis (E75.4)
  • Creutzfeldt-Jakob disease (A81.0-)

+21 more in Instructions

Excludes1Never report with this code
  • mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)
Excludes2Not included here; may be reported together
  • dementia in alcohol and psychoactive substance disorders (F10-F19, with .17, .27, .97)
  • vascular dementia (F01.5-, F01.A-, F01.B-, F01.C-)
IncludesWhat this code covers
  • Major neurocognitive disorder in other diseases classified elsewhere

Where it sits Source: CMS/NCHS

Under:Chapter 5: Mental, Behavioral and Neurodevelopmental DisordersF01-F09 Mental disorders due to known physiological conditions

Codes under F02 (4)

  • F02.8Dementia in other diseases classified elsewhere, unspecified severityNot billable
  • F02.ADementia in other diseases classified elsewhere, mildNot billable
  • F02.BDementia in other diseases classified elsewhere, moderateNot billable
  • F02.CDementia in other diseases classified elsewhere, severeNot billable

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for F02 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • Major neurocognitive disorder in other diseases classified elsewhere

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Code First

Underlying conditions that must be sequenced before this code.

  • 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
  • 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)

Coder workflow for F02

MedCoder structured workflow — derived from this code’s own official record

Before you code F02

  1. F02 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

    ReviewF02.8, F02.A, F02.B, F02.C

    See the relationships section · Guide: How to choose an ICD-10-CM code →

  2. F02 is a manifestation code (“in diseases classified elsewhere”). Confirm the underlying condition is documented and sequence it first; a manifestation code is not reported as the first-listed or principal diagnosis. The etiology/manifestation convention (Guidelines I.A.13).

    See the official tabular notes · Guide: Manifestation codes and Code First sequencing →

  3. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with the code beneath F02. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support one of the more specific codes beneath F02?
    Yes → Select that code and continue the checks below on its own page.
    No → F02 cannot be reported as written. Where the codes beneath it include an unspecified code, that code applies when the record goes no further; otherwise query for the missing detail.

    ReviewF02.8, F02.A, F02.B, F02.C

  2. Does the documentation support a condition named in F02’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewF06.7

  3. Is the underlying (etiologic) condition the Code First note names documented?
    Yes → Sequence the underlying condition first, then the code beneath F02.
    No → A manifestation code needs its underlying condition — query before reporting it.

    ReviewG30, E75.4, A81.0, G40, E83.01, B20

Report the code beneath F02 that the documentation supports, not F02 itself. Then confirm that code is valid for the date of service on its own page.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
The underlying (etiologic) condition
Named in the Code First note; sequenced before this code when documented (Guidelines I.A.13).

Official instructions as workflow

  • Excludes1 — check before selecting F02(1 note)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with F02: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareF06.7

    See the official tabular notes · Guidelines I.A.12.a

  • Excludes2 — not part of F02(2 notes)

    Coding workflow: The conditions named in this note are not included in F02. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareF01.5, F01.A, F01.B, F01.C

    See the official tabular notes · Guidelines I.A.12.b

  • Code First — sequencing check(25 notes)

    Coding workflow: Check whether the underlying or etiologic condition the note names is documented. When it is, sequence it before F02. Do not add an underlying condition the record does not document.

    ReviewG30, E75.4, A81.0, G40, E83.01, B20

    See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Both the condition F02 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewF06.7

Documentation: The underlying condition the Code First note names is documented alongside this condition.

Coding question: How are the two sequenced?

Path: Review the Code First note.

Reason: The underlying condition is sequenced first and the manifestation follows (Guidelines I.A.13).

ReviewG30, E75.4, A81.0, G40, E83.01, B20

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse F02 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of F02 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • F06.7— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance moves the case to F06.7; the two are not reported together unless documented as unrelated.

    Full comparison: F02 vs F06.7 →

  • F10— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of dementia in alcohol and psychoactive substance disorders adds F10; it is not part of this code and both may be reported when both are documented.

    Full comparison: F02 vs F10 →

  • F19— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of dementia in alcohol and psychoactive substance disorders adds F19; it is not part of this code and both may be reported when both are documented.

    Full comparison: F02 vs F19 →

  • F01.5— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of vascular dementia adds F01.5; it is not part of this code and both may be reported when both are documented.

    Full comparison: F02 vs F01.5 →

  • F01.A— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of vascular dementia adds F01.A; it is not part of this code and both may be reported when both are documented.

    Full comparison: F02 vs F01.A →

  • F01.B— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of vascular dementia adds F01.B; it is not part of this code and both may be reported when both are documented.

    Full comparison: F02 vs F01.B →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Dementia in other diseases classified elsewhere is a non-billable ICD-10-CM category code (F02). A more specific billable subcode must be selected for claims submission.

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Official Coding Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Verbatim excerpts from the ICD-10-CM Official Guidelines for Coding and Reporting (CMS/NCHS) that govern this code.

Chapter 5: Mental, Behavioral and Neurodevelopmental disorders (F01 – F99)

d. Dementia The ICD-10-CM classifies dementia (categories F01, F02, and F03) on the basis of the etiology and severity (unspecified, mild, moderate or severe). Selection of the appropriate severity level requires the provider’s clinical judgment and codes should be assigned only on the basis of provider documentation (as defined in the Official Guidelines for Coding and Reporting), unless otherwise instructed by the classification. If the documentation does not provide information about the severity of the dementia, assign the appropriate code for unspecified severity.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. Sequencing: 25 Code First instructions — the underlying condition is sequenced before this code when present. See the Code First notes
  2. 1 Excludes1 entry — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  3. 2 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name F02 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 2 Excludes1 notes across 2 chapters: F06.7 — Mild neurocognitive disorder due to known physiological condition, G31.84 — Mild cognitive impairment of uncertain or unknown etiology.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 3 Excludes2 notes: F06 — Other mental disorders due to known physiological condition, F63.1 — Pyromania, F63.2 — Kleptomania.

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Contextual Map

Every relationship of F02 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run F02 with these 21 related codes in Claim Check

Hierarchy

Excludes1

Excludes2 (14)

Code First (56)

Referenced by Excludes1 notes

Referenced by Excludes2 notes

Nearest codes (32)

Change history (4)

Relevant guides

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Common coding questions

MedCoder editorial

Can F02 be billed directly?

No. F02 (Dementia in other diseases classified elsewhere) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Coding guidelines Official source data
ICD-10-CM Official Guidelines for Coding and Reporting (FY2027), quoted by section Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder-derived relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder editorial explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "F02 — Dementia in other diseases classified elsewhere." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/f02-dementia-in-other-diseases-classified-elsewhere

Change history

Changed in FY2027, the release in force: Code First note added; Code First note removed.

  • FY2027 — October 1, 2026
    Code First note added
    other frontotemporal neurocognitive disorder (G31.09)
    FY2027 changes
  • FY2027 — October 1, 2026
    Code First note removed
    other frontotemporal neurocognitive disorder (G31.90)
    FY2027 changes
  • FY2027 — October 1, 2026
    Code First note removed
    frontotemporal dementia (G31.09)
    FY2027 changes
  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Dementia in other diseases classified elsewhere

Nearest Codes in This Family

Official ICD-10-CM classifications closest to F02 in its code family, with their registry titles.