The bipolar disorder icd 10 is categorized under the F31, which refers to the category of bipolar affective disorders in the ICD-10 system of mental, behavioral, and neurodevelopmental disorders. Healthcare providers record diagnoses, treatment, and insurance claims using the icd code for bipolar disorder. The definition of bipolar disorder, ICD-10, is a mood disorder that has at least two types of mood episodes, which usually include manic or hypomanic episodes and depression.
The ICD-10 classification of bipolar disorders incorporates the sub-heading of F31.0-F31.9, which outlines the type of episode or status of clinical presentation, which may include either hypomanic, manic, depressive, mixed, remission, or unspecified bipolar disorder. With this coding structure, clinicians can identify the most recent episode and record symptom intensity.
UndeICDanding the bipolar disorder ICD-10 category assists in proper diagnosis and correct clinical records among various healthcare facilities.
What Is Bipolar Affective Disorder in ICD-10?
In the ICD-10 (International Classification of Diseases, 10th Revision), bipolar affective disorder icd 10 is defined as a chronic mental health condition characterized by repeated episodes in which the patient’s mood and activity levels are significantly disturbed. This disturbance consists on some occasions of an elevation of mood and increased energy and activity (mania or hypomania), and on others of a lowering of mood and decreased energy and activity (depression).
Mood Disorder Classification
Within the ICD-10 framework, bipolar icd 10 is situated within the broader block of F30–F39 Mood [affective] disorders. This block categorizes conditions where the fundamental disturbance is a change in affect or mood, usually accompanied by a change in the overall level of activity.
The Episodic Nature of Bipolar Disorder
The hallmark of affective disorder classification for bipolar disorder is its episodic nature. As described in ICD-10 clinical descriptions:
- Mood Episodes: Diagnosis typically requires at least two distinct episodes, one of which must be hypomanic, manic, or mixed.
- Manic Episode: It is characterized by euphoria, irritability, and overactivity. In case the symptoms are too severe to be disabling by social or occupational functioning, or the symptoms involve psychosis, then it is coded in the F31.1 to F31.2 range.
- Hypomania: A lesser degree of mania (F31.0) where symptoms are present but do not result in severe social rejection or the need for hospitalization.
- Depressive Episode: Periods of lowered mood, loss of interest, and reduced energy. In bipolar disorder, these are classified under the F31.3–F31.5 range depending on severity.
In contrast to unipolar depression, in which only depressed poles are experienced, the bipolar affective disorder icd 10 outlines the alternation between such emotion extremes, which guarantees that clinicians trace the complete history of mood swings through which a patient is going instead of the current one.
Bipolar Disorder ICD-10 Category F31 Overview
The F31 category serves as the primary diagnostic classification for bipolar affective disorder within the ICD-10. This category is structured to capture the cyclical nature of the condition, allowing clinicians to document the specific characteristics of a patient’s current mental state.
Using a decimal system from F31.0 to F31.9, the ICD-10 differentiates between various phases such as mania, hypomania, and depression. It also accounts for the severity of symptoms and the presence of psychotic features.
ICD-10 Chapter Classification
Bipolar disorder is organized within a specific hierarchy to ensure clinical accuracy:
- Chapter V: Mental and Behavioural Disorders (F00–F99)- This chapter includes all conditions related to mental health, from organic disorders to personality and behavioral issues.
- F30–F39 Mood Disorders- This block is reserved for conditions where the fundamental disturbance is a change in mood or affect. This is usually accompanied by a change in a person’s overall level of activity.
- F31 Bipolar Affective Disorder- This specific category is for individuals who experience both high and low mood poles.
Diagnostic Criteria in ICD-10
The ICD-10 requires specific clinical observations to confirm a diagnosis. Unlike a single episode of depression, bipolar disorder is defined by its history over time.
Minimum Episodes
A formal diagnosis generally requires the patient to have experienced at least two distinct mood episodes. At least one of these episodes must be hypomanic, manic, or mixed to distinguish the condition from recurrent depression.
Manic and Hypomanic Phases
The elevated states of bipolar disorder are categorized by their intensity and impact on daily life.
- Hypomania (F31.0): This involves a persistent mild elevation of mood and increased energy. It does not typically lead to severe social disruption or the need for hospitalization.
- Mania (F31.1 and F31.2): This is a more intense state involving racing thoughts and grandiosity. It is coded as “with psychotic symptoms” (F31.2) if hallucinations or delusions occur.
Depressive Phases
The low states (F31.3 to F31.5) involve a significant drop in mood and energy. The ICD-10 requires clinicians to specify the level of severity:
- Mild or Moderate: Significant distress is present, but the individual maintains some ability to function.
- Severe: Extreme distress often involving a loss of self-esteem or physical slowing of movement.
Remission States
The F31 category has the remission code (F31.7). This is used when a patient has met the criteria for bipolar disorder in the past but is not currently displaying significant mood disturbances. This will ensure the patient’s medical history is maintained when the patient is in a stable condition.
Complete List of Bipolar Disorder ICD-10 Codes (F31)
The ICD code to be used for bipolar disorder must be selected based on a direct comparison between the patient’s current clinical presentation and the existing sub-codes under the F31 category. The following table provides a structured breakdown of icd 10 bipolar disorder codes to ensure accurate documentation and billing.
| ICD-10 Code | Diagnosis | Description |
| F31.0 | Bipolar disorder, current episode hypomanic | Features a persistent mild elevation of mood and increased energy without the severe disruption of full mania. |
| F31.1 | Bipolar disorder, current episode manic without psychotic symptoms | Characterized by an intensely elevated mood and significant functional impairment, but without delusions or hallucinations. |
| F31.2 | Bipolar disorder, current episode manic with psychotic symptoms | Represents a severe manic state accompanied by psychotic features such as grandiosity-based delusions or auditory hallucinations. |
| F31.3 | Bipolar disorder, current episode mild or moderate depression | The patient is in a depressive phase where symptoms are significant but do not reach the highest level of severity. |
| F31.4 | Bipolar disorder, current episode, severe depression without psychotic symptoms | A profound depressive state involving intense distress and loss of function, but lacking psychotic features. |
| F31.5 | Bipolar disorder, current episode severe depression with psychotic symptoms | Severe depression accompanied by hallucinations or delusions, often involving themes of guilt, poverty, or disaster. |
| F31.6 | Bipolar disorder, current episode mixed | Occurs when manic and depressive symptoms are both prominent or alternate rapidly within the same episode. |
| F31.7 | Bipolar disorder, currently in remission | Used for patients who have experienced at least two episodes in the past but are currently stable and asymptomatic |
| F31.8 | Other bipolar affective disorders | Includes atypical patterns and specific conditions like Bipolar II disorder (F31.81). |
| F31.9 | Bipolar disorder, unspecified | A placeholder used when a bipolar diagnosis is confirmed, but there is insufficient documentation to specify the current episode. |
Bipolar I Disorder ICD-10 Codes
When documenting a diagnosis of bipolar 1 disorder, icd 10, the primary indicator is the presence of at least one full manic episode. The extremely high moods that are the subject of bipolar 1 icd 10 classification are unlike those of the other forms of the condition and require much clinical intervention. The coding system enables health care professionals to note whether a patient is currently in mania, depression, or a stable phase.
Bipolar I Current Episode Manic Codes
In bipolar 1 disorder, icd 10, manic episodes are marked by a significant increase in energy, racing thoughts, and a decreased need for sleep. Bipolar 1 icd 10 provides two primary codes to distinguish the severity of these episodes.
- F31.1: This code is used when the current episode is manic but does not include psychotic symptoms. While the patient may experience high levels of impulsivity or grandiosity, they remain in touch with reality.
- F31.2: This code applies when the manic episode includes psychotic symptoms. This means the patient may experience delusions, such as believing they have special powers, or auditory and visual hallucinations.
Bipolar I Current Episode Depressed Codes
While mania is the defining feature of Bipolar I, many individuals spend a significant amount of time in depressive phases. The coding for these episodes depends on the severity of the symptoms and the impact on the individual’s ability to function.
- F31.3: This is used for current episodes of mild or moderate depression. The person may struggle with daily tasks and feel a persistent low mood, but they maintain some level of functioning.
- F31.4: This code represents severe depression without psychotic symptoms. At this level, the individual may experience profound hopelessness, physical slowing, and an inability to perform basic self care.
- F31.5: This applies to severe depression that includes psychotic symptoms. These often involve “mood-congruent” delusions, such as intense feelings of guilt, worthlessness, or false beliefs about physical illness.
Bipolar I Mixed Episode
Living with Bipolar I sometimes involves experiencing symptoms of both poles at the same time.
- F31.6: This code is reserved for a mixed episode. During these periods, a person might feel the high energy and agitation of mania while simultaneously feeling the intense sadness and suicidal ideation associated with depression. These episodes of self-care are often high-risk because the person has the energy to act on their depressive thoughts.
Bipolar I In Remission
Bipolar I is a lifelong condition, but it is not always active. Effective management through medication and therapy can lead to long periods of stability.
- F31.7: This code indicates the disorder is currently in remission. It is used when a person has met the criteria for Bipolar I in the past but is not currently exhibiting significant manic or depressive symptoms. Using this code ensures that the patient’s medical history is recognized so that preventive care can continue.
Bipolar II Disorder ICD-10 Code (F31.81)
In clinical documentation, bipolar 2 disorder icd 10 is classified under the specific code F31.81. While Bipolar I is defined by full manic episodes, Bipolar II follows a different clinical path. It is characterized by a pattern of depressive episodes shifting back and forth with hypomanic episodes.
For a diagnosis to fall under this category, the individual must have experienced at least one major depressive episode and at least one hypomanic episode during their lifetime. A key requirement for using the f31.81 code is that the person has never experienced a full manic episode. If a manic episode occurs even once, the diagnosis typically shifts to Bipolar I.
Understanding the Bipolar II Pattern
Bipolar II is often misunderstood as a milder version of the condition because it lacks full mania. However, the depressive phases in Bipolar II can be frequent and intense, often lasting longer than those found in Bipolar I. The highs in this version of the disorder are known as hypomania. These are elevated states that are noticeable to others but generally do not cause the same level of functional impairment or require hospitalization.
When to Use ICD-10 Code F31.81
The code f31.81 is essential for differentiating between these two distinct types of bipolar disorder. Accurate use of this code ensures that the treatment plan is tailored to managing recurrent depression and identifying the subtle signs of hypomania.
Hypomanic Episode History
Healthcare providers use this code when a patient presents with a history of hypomania. This might look like a period of four or more days where the person feels unusually cheerful, energetic, or productive. During these times, the person might talk faster than usual or have many new ideas, but they remain capable of managing their daily responsibilities.
Recurrent Depressive Episodes
A major reason for using the f31.81 code is to track individuals who primarily seek help for depression. Many people with Bipolar II are initially misdiagnosed with clinical depression because they only seek treatment during their low periods.
Bipolar Depression ICD-10 Codes
The bipolar depression icd 10 classification system uses specific codes to describe the current state of a patient experiencing a depressive episode. Because bipolar disorder is cyclical, the ICD-10 requires clinicians to specify the level of severity and whether psychotic features are present. This ensures the treatment plan matches the intensity of the patient’s current struggle.
Mild or Moderate Bipolar Depression
Code F31.3 is used when a patient presents with a depressive episode that is not considered severe.
- Symptoms: Persistent low energy, sadness, or a loss of interest in typical activities.
- Functioning: The individual may struggle with social or work obligations but can generally maintain daily routines. This is often managed in outpatient settings.
Severe Bipolar Depression
When depression significantly halts a person’s ability to live their life, code F31.4 is assigned.
- Symptoms: Profound distress, hopelessness, and physical symptoms like significant sleep disturbances or a visible slowing of movement.
- Functioning: The person is often unable to function at work or home. While distress is high, the individual remains in touch with reality.
Bipolar Depression With Psychotic Features
Code F31.5 represents the most intense depressive state.
- Symptoms: All the markers of severe depression combined with psychosis.
- Psychotic Features: This involves delusions or hallucinations, and such may consist of false beliefs of guilt, worthlessness, or physical illness. This condition is normally associated with in-depth surveillance or hospitalization.
Symptom Severity Classification
These codes depend on the amount and severity of symptoms to determine the transition between them. The ICD-10 considers the three important factors:
- Symptom Count: The number of depressive symptoms (low mood, sleep problems, and fatigue) that the patient is experiencing.
- Level of Disability: How greatly the symptoms are disruptive to the ability of the patient to work, sustain relationships, and carry out self-care.
- Presence of Psychosis: The definitive factor that moves a diagnosis from F31.4 to F31.5 is the presence of hallucinations or delusions.
ICD-10 Code F31.9 (Bipolar Disorder Unspecified)
The code F31.9 is utilized within the clinical environment when a diagnosis of bipolar disorder is confirmed, but the specific nature of the current episode remains unclear. In the medical record, bipolar disorder, unspecified icd 10, serves as a vital classification for maintaining a patient’s diagnostic history while acknowledging that the current clinical picture is not yet fully documented.
Incomplete Documentation
This code is used when a provider knows a patient has bipolar disorder but lacks the records to specify their current state. For example, if a patient is transferred from another facility without their full history, F31.9 allows the new provider to acknowledge the condition without making unverified claims about whether the patient is manic, depressed, or in remission.
Subtype Not Recorded
In some cases, a patient can be at a transitional stage, which does not qualify under a particular category, or the clinician has not had much time to differentiate between Bipolar I and Bipolar II. Bipolar disorder, unspecified, icd 10 would allow the patient to get specific care, with the additional assessment being done to identify the actual subtype.
Common Billing Use Cases
From an administrative perspective, the f31.9 code helps maintain continuity in care and insurance processing:
- Initial Intakes: Used during a first appointment when a history of bipolar disorder is reported but not yet clinically observed by the current provider.
- Emergency Care: Used in crisis situations where the immediate priority is stabilization rather than detailed sub-typing.
- Referrals: Often used by primary care doctors when referring a patient to a psychiatrist for more specific diagnostic clarity.
While useful as a starting point, clinicians generally update the record to a more specific code once the patient’s current mood and history are fully confirmed.
Bipolar Disorder Coding Guidelines for Clinicians
Accurate coding within the F31 category requires a systematic approach to the patient’s current clinical presentation. To be guided by a definite logic, clinicians must make sure that the ICD code of bipolar disorder chosen should capture the present episode and the history of the disorder throughout the lifetime.
Determine Current Episode
The first step is identifying the “polarity” of the patient’s current state. This is the primary driver for the first decimal point in the icd 10 bipolar disorder code.
- Manic: If the patient is currently experiencing euphoria, grandiosity, or high-risk impulsivity.
- Hypomanic: If the patient shows elevated mood and energy that is noticeable but does not cause severe functional impairment.
- Depressed: If the patient is in a low-energy state with persistent sadness or loss of interest.
- Mixed: If the patient simultaneously displays symptoms of both mania and depression.
Assess Severity Level
Once the episode type is identified, the clinician must determine the severity to choose the correct sub-code. This typically applies to manic and depressive episodes.
- Mild/Moderate: The symptoms cause distress but allow for some level of daily functioning.
- Severe: The symptoms result in a near-total inability to function in social or work settings.
- Psychotic Features: If the patient experiences delusions or hallucinations, specific codes (like F31.2 or F31.5) must be used.
Check Remission Status
If a patient has a confirmed history of bipolar disorder but is not currently in a symptomatic episode, the F31.7 code is used to track remission.
- Partial Remission: Symptoms have improved significantly and no longer meet full diagnostic criteria, but some markers of the disorder remain.
- Full Remission: The patient has been entirely free of significant manic or depressive symptoms for a sustained period.
Following this logic (Episode > Severity > Remission) ensures that the medical record is precise, supporting both effective treatment planning and accurate administrative documentation.
Bipolar Disorder ICD-10 vs. ICD-11 Differences
The replacement of ICD-10 by ICD-11 reflects a more current view of mood disorders, as it dispenses with a strict decimal system in favor of a more descriptive and useful clinical system.
Structural Change
In ICD-10, bipolar disorder is a single category (F31) within the mood disorders block. Contrarily, ICD-11 established a specific classification known as Bipolar or Related Disorders (6A60-6A6Z). This change differentiates between bipolar conditions and depressive disorders and shows that these two disorders have different biological and treatment pathways.
Diagnostic Refinement
ICD-11 introduces stricter and more specific criteria to reduce misdiagnosis:
- Emphasis on Energy: The level of mood (euphoria/irritability) was high in ICD-10, but ICD-11 mandates more energy and activity as one of the key symptoms of mania and hypomania.
- Distinct Types: ICD-11 explicitly separates Bipolar Type I (at least one manic episode) and Bipolar Type II (hypomanic and depressive episodes only) into their own primary codes.
- Mixed Features: ICD-11 does not have a code for a Mixed Episode but has a code for Mixed Symptoms that may be used on any manic, hypomanic, or depressive state.
Updated Terminology
The language used in ICD-11 is designed to be more precise:
- From “Affective” to “Mood”: The term “affective” was largely replaced by “mood” to better align with modern-day clinical language.
- Dimensional Specifiers: ICD-11 enables clinicians to add specifiers to a diagnosis rather than assigning a new code for each variation. This involves recording the existence of anxiety symptoms, the level of severity, or the nature of psychotic features without altering the base code.
The purpose of these changes is to assist the clinicians in detecting the disorder more precisely, especially with Bipolar II, which were usually classified as other in the old ICD-10 system.
Common ICD-10 Coding Errors for Bipolar Disorder
Proper ICD-10 coding for bipolar disorder requires documentation that describes the current mood episode along with essential clinical elements. The medical record contains sufficient information to assign a specific episode code, yet the common error results in the use of F31.9 (bipolar disorder unspecified) as the designated code. The confusion between Bipolar II disorder and major depressive disorder occurs because evaluators fail to recognize past hypomanic episodes.
Coding errors occur because mixed episodes receive wrong classification when both manic and depressive symptoms appear together without mixed episode identification. Clinicians fail to document severe case psychotic symptoms, which require special codes F31.2 and F31.5. The process of eliminating these errors enables the creation of precise medical documents, which aid in correct treatment strategies while increasing the accuracy of insurance and administrative data.
Documentation Requirements for Accurate Bipolar Coding
To have the right ICD-10 code to identify that a patient has bipolar disorder, clinicians should present a clear and detailed account of how the patient currently looks. The record must determine the type of current episode (manic, hypomanic, depressive, and mixed) of bipolar disorders, as the codes of ICD-10 are defined according to the last episode of a mood. It must also state the degree of severity of the symptoms, which can be either mild, moderate, or severe. The existence of any psychotic symptoms, such as hallucinations or delusions, should be documented, as these characteristics alter the diagnostic code.
Moreover, clinicians are to note remission as an outcome if the patient is stable or has no symptoms at the moment. Lastly, the medical record must indicate the type of bipolar subtype, such as Bipolar I or Bipolar II disorder. Consistent recording of these elements can help ensure accurate ICD-10 coding, enhance treatment planning, and facilitate accurate medical billing and insurance processing.
Related ICD-10 Mood Disorder Codes
For a broader understanding of mood disorders in ICD-10, clinicians and coders may reference related codes alongside F31 bipolar disorder:
- F30: Manic episode – for isolated manic episodes without a prior history of bipolar disorder.
- F32: Depressive episode – used when a patient experiences a single depressive episode.
- F33: Recurrent depressive disorder – applied when depressive episodes repeat over time without mania or hypomania.
- F34: Persistent mood [affective] disorders – includes cyclothymia and dysthymia, representing long-term mood disturbances.
These codes provide context for coding mood disorders and help differentiate bipolar disorder from other affective conditions.
Frequently Asked Questions
What is the ICD-10 code for bipolar disorder?
The primary classification is the F31 category. Because bipolar disorder is cyclical, this category uses various sub-codes to describe the patient’s current mood state, such as manic, depressive, or in remission.
What is the ICD-10 code for bipolar II disorder?
The specific code is F31.81. This is used for individuals who experience major depressive episodes and hypomanic episodes but have no history of full manic episodes.
What is the ICD-10 code for bipolar depression?
It ranges from F31.3 to F31.5, depending on the severity of the symptoms:
- F31.3: Mild or moderate depression.
- F31.4: Severe depression without psychotic features.
- F31.5: Severe depression with psychotic features (hallucinations or delusions).
What does F31.9 mean?
This code stands for Bipolar disorder, unspecified. It is a placeholder used when a bipolar diagnosis is confirmed, but the specific nature of the current episode (such as severity or polarity) is not yet documented or known.
