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  3. Chapter: F00–F99
  4. Section: F01-F09
  5. Block: F05
  6. F05 - Delirium due to known physiological condition

2022 ICD-10-CM Code F05
Delirium due to known physiological condition

Version 2022
Billable Code
ICD-10:F05
Short Description:Delirium due to known physiological condition
Long Description:Delirium due to known physiological condition
Status: Valid for Submission

Code Classification

  • Mental and behavioural disorders (F00–F99)
    • Mental disorders due to known physiological conditions (F01-F09)
      • Delirium due to known physiological condition (F05)

F05 is a billable diagnosis code used to specify a medical diagnosis of delirium due to known physiological condition. The code F05 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.

The ICD-10-CM code F05 might also be used to specify conditions or terms like acute confusional state, of endocrine origin, acute confusional state, of infective origin, acute confusional state, of metabolic origin, acute confusional state, post-traumatic, delirium of mixed origin , hyperactive postoperative delirium, etc.

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code F05:


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.

Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

Entries in the Index to Diseases and Injuries with references to F05

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code F05 are found in the index:

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Convert F05 to ICD-9 Code

The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code F05 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.

Information for Patients


Delirium

What is delirium?

Delirium is a mental state in which you are confused, disoriented, and not able to think or remember clearly. It usually starts suddenly. It is often temporary and treatable.

There are three types of delirium:

What causes delirium?

There are many different problems that can cause delirium. Some of the more common causes include

Who is at risk for delirium?

Certain factors put you at risk for delirium, including

What are the symptoms of delirium?

The symptoms of delirium usually start suddenly, over a few hours or a few days. They often come and go. The most common symptoms include

How is delirium diagnosed?

Your health care provider may use many tools to make a diagnosis:

Delirium and dementia have similar symptoms, so it can be hard to tell them apart. They can also occur together. Delirium starts suddenly and can cause hallucinations. The symptoms may get better or worse and can last for hours or weeks. On the other hand, dementia develops slowly and does not cause hallucinations. The symptoms are stable and may last for months or years.

What are the treatments for delirium?

Treatment of delirium focuses on the causes and symptoms of delirium. The first step is to identify the cause. Often, treating the cause will lead to a full recovery. The recovery may take some time - weeks or sometimes even months. In the meantime, there may be treatments to manage the symptoms, such as

Can delirium be prevented?

Treating the conditions that can cause delirium may reduce the risk of getting it. Hospitals can help lower the risk of delirium by avoiding sedatives and making sure that the room is kept quiet, calm, and well-lit. It can also help to have family members around and to have the same staff members treat the person.


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Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)

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