F04 — Amnestic disorder due to known physiological condition
Is F04 billable?
Yes — F04 is billable for FY2027. F04 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. F04 may be submitted for encounters from October 1, 2026 through September 30, 2027.
F04 at a glance
| Code | F04 |
|---|---|
| Description | Amnestic disorder due to known physiological condition |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does F04 group to?
F04 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
How is F04 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F04. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Amnes (t)ic syndrome (post-traumatic)
- Meynert's amentia (nonalcoholic)
- Toxemica cerebropathia psychica (nonalcoholic)
- Amentia › Meynert's
- Disease, diseased › Korsakoff's
- Korsakoff's › nonalcoholic (Wernicke) disease, psychosis or syndrome (alcoholic)
- Psychosis, psychotic › Korsakoff's, Korsakov's, Korsakow's
- Syndrome › Korsakoff
- Syndrome › Wernicke-Korsakoff
- Wernicke-Korsakoff's syndrome or psychosis › nonalcoholic (alcoholic)
- Disorder › amnesic, amnestic › due togeneral medical condition (of)
- Syndrome › organic › amnesic
Excludes1 — never code together
The conditions below can never be reported together with F04 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Code first
The underlying condition below must be sequenced before F04. F04 describes a manifestation and cannot be the principal or first-listed diagnosis.
- the underlying physiological condition
Excludes2 — not included here
The conditions below are not part of F04, but a patient may have both at the same time. When documentation supports it, F04 and the excluded code may both be reported.
Inclusion terms
Alternative wording in documentation that is classified to F04.
- Korsakov's psychosis or syndrome, nonalcoholic
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F04, but a patient may have both at the same time. When documentation supports it, F04 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
How long has F04 existed?
F04 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with F04?
ICD-10-CM declares these codes mutually exclusive with F04 — exactly one of each pair can be correct for a given encounter.