F03.B18 — Unspecified dementia, moderate, with other behavioral disturbance
Is F03.B18 billable?
Yes, but F03.B18 is an unspecified code. F03.B18 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, F03.B18 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting F03.B18 — the more specific alternatives are listed below.
More specific alternatives
F03.B18 at a glance
| Code | F03.B18 |
|---|---|
| Description | Unspecified dementia, moderate, with other behavioral disturbance |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does F03.B18 group to?
F03.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, F03.B18 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is F03.B18 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F03.B18. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Dementia › moderate › with › behavioral disturbances (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
- Dementia › 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 F03.B18 to fully describe the condition. F03.B18 is sequenced first.
- code, if applicable, to identify wandering in unspecified dementia (Z91.83)
Inclusion terms
Alternative wording in documentation that is classified to F03.B18.
- Unspecified dementia, moderate, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F03.B18, but a patient may have both at the same time. When documentation supports it, F03.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 F03
The conditions below are not part of F03.B18, but a patient may have both at the same time. When documentation supports it, F03.B18 and the excluded code may both be reported.
How long has F03.B18 existed?
F03.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.