F02.B18 — Dementia in other diseases classified elsewhere, moderate, with other behavioral disturbance
Is F02.B18 billable?
Yes — F02.B18 is billable for FY2027. F02.B18 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. F02.B18 may be submitted for encounters from October 1, 2026 through September 30, 2027.
F02.B18 at a glance
| Code | F02.B18 |
|---|---|
| Description | Dementia in other diseases classified elsewhere, moderate, with other behavioral disturbance |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to F02.B18?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name F02.B18 directly.
This code describes a manifestation of an underlying disease. The underlying condition must be sequenced before it, so it can never be the principal or first-listed diagnosis.
Which MS-DRGs does F02.B18 group to?
F02.B18 sits in MDC 19 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 884Organic Disturbances and Intellectual Disabilitymedical
As a secondary diagnosis, F02.B18 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is F02.B18 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F02.B18. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Dementia › in › diseases specified elsewhere › moderate › with › behavioral disturbances (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
- Dementia › in › diseases specified elsewhere › moderate › with › behavioral disturbances › specified NEC (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
Use additional code
Report an additional code alongside F02.B18 to fully describe the condition. F02.B18 is sequenced first.
- code, if applicable, to identify wandering in dementia in conditions classified elsewhere (Z91.83)
Inclusion terms
Alternative wording in documentation that is classified to F02.B18.
- Dementia in other diseases classified elsewhere, moderate, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition
- Major neurocognitive disorder in other diseases classified elsewhere, moderate, with behavioral disturbance such as sleep disturbance, social disinhibition, or sexual disinhibition
Excludes1 — never code together — inherited from F02
The conditions below can never be reported together with F02.B18 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)
Code first — inherited from F02
The underlying condition below must be sequenced before F02.B18. F02.B18 describes a manifestation and cannot be the principal or first-listed diagnosis.
- 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)
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F02.B18, but a patient may have both at the same time. When documentation supports it, F02.B18 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Excludes2 — not included here — inherited from F02
The conditions below are not part of F02.B18, but a patient may have both at the same time. When documentation supports it, F02.B18 and the excluded code may both be reported.
How long has F02.B18 existed?
F02.B18 first appears in FY2023.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.