F01.C18 — Vascular dementia, severe, with other behavioral disturbance
Is F01.C18 billable?
Yes — F01.C18 is billable for FY2027. F01.C18 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. F01.C18 may be submitted for encounters from October 1, 2026 through September 30, 2027.
F01.C18 at a glance
| Code | F01.C18 |
|---|---|
| Description | Vascular dementia, severe, 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 F01.C18 group to?
F01.C18 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, F01.C18 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is F01.C18 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F01.C18. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Dementia › vascular › severe › with › behavioral disturbances (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
- Dementia › vascular › severe › 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 F01.C18 to fully describe the condition. F01.C18 is sequenced first.
- code, if applicable, to identify wandering in vascular dementia (Z91.83)
Inclusion terms
Alternative wording in documentation that is classified to F01.C18.
- Major neurocognitive disorder due to vascular disease, severe, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition
- Vascular dementia, severe, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition
Code first — inherited from F01
The underlying condition below must be sequenced before F01.C18. F01.C18 describes a manifestation and cannot be the principal or first-listed diagnosis.
- , if applicable, any causal condition
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F01.C18, but a patient may have both at the same time. When documentation supports it, F01.C18 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
How long has F01.C18 existed?
F01.C18 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.