ICD-10-CM Diagnosis Code F45.4 - Pain disorders related to psychological factors

ICD List 2025-2026 Edition

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ICD-10-CM Codes
F01–F99
F40-F48
F45
2026 ICD-10-CM Code F45.4

ICD-10-CM Code:

F45.4

ICD-10 Code for:

Pain disorders related to psychological factors

Is Billable?

Not Valid for Submission

Code Navigator:

F45.4 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of pain disorders related to psychological factors. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Non-specific codes like F45.4 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for pain disorders related to psychological factors:

Use F45.41 for Pain disorder exclusively related to psychological factors

Use F45.42 for Pain disorder with related psychological factors

Code Information
Specific Coding
Clinical Information
Tabular List of Diseases and Injuries
Patient Education
Other Codes Used Similar Conditions
Code History

Mental and behavioural disorders
F01–F99
- Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
  F40-F48
  * Somatoform disorders
  F45
Somatoform Disorders

disorders having the presence of physical symptoms that suggest a general medical condition but that are not fully explained by another medical condition, by the direct effects of a substance, or by another mental disorder. the medically unexplained symptoms must cause clinically significant distress or impairment in social, occupational, or other areas of functioning. in contrast to factitious disorders and malingering, the physical symptoms are not under voluntary control. (apa, dsm-v)

Mental Disorders

What are mental disorders?

Mental disorders (or mental illnesses) are conditions that affect your thinking, feeling, mood, and behavior. They may happen over a short period of time or come and go. Some can be chronic (long-lasting). They can affect your ability to relate to others and function each day..

What are some types of mental disorders?

There are many different types of mental disorders. Some common ones include:

Anxiety disorders, including panic disorder, obsessive-compulsive disorder, and phobias
Depression, bipolar disorder, and other mood disorders
Eating disorders
Personality disorders
Post-traumatic stress disorder (PTSD)
Psychotic disorders, including schizophrenia

What causes mental disorders?

There is no single cause for mental illness. A number of factors can contribute to risk for mental illness, such as:

Your genes and family history
Your life experiences, such as stress or a history of abuse, especially if they happen in childhood
Biological factors such as chemical imbalances in the brain
A traumatic brain injury (TBI)
Prenatal (before birth) exposure to viruses, toxic chemicals, or other substances such as alcohol and drugs.
Use of alcohol or recreational drugs
Having a serious medical condition like cancer
Having few friends, and feeling lonely or isolated

Mental disorders are not caused by character flaws. They have nothing to do with being lazy or weak.

Who is at risk for mental disorders?

Mental disorders are common. Many Americans will be diagnosed with a mental disorder at some time in their life.

How are mental disorders diagnosed?

The steps to getting a diagnosis include:

A medical history
A physical exam and possibly lab tests, if your provider thinks that other medical conditions could be causing your symptoms
A psychological evaluation. You will answer questions about your thinking, feelings, and behaviors.

What are the treatments for mental disorders?

Treatment depends on which mental disorder you have and how serious it is. You and your provider will work on a treatment plan just for you. It usually involves some type of therapy. You may also take medicines. Some people also need social support and education on managing their condition.

In some cases, you may need more intensive treatment. You may need to go to a psychiatric hospital. This could be because your mental illness is severe. Or it could be because you are at risk of hurting yourself or someone else. In the hospital, you will get counseling, group discussions, and activities with mental health professionals and other patients.

[Learn More in MedlinePlus]

Pain

What is pain?

Pain is a signal in your nervous system that something may be wrong. It is an unpleasant feeling, such as a prick, tingle, sting, burn, or ache. Each person feels pain differently, even if the reason for the pain is the same. Pain may be sharp or dull. It may be mild or severe. Pain may come and go, or it may be constant. You may feel pain in one area of your body, such as your back, abdomen, chest, or pelvis, or you may feel it all over.

Pain can help alert you that there is a problem. If you never felt pain, you might seriously hurt yourself without knowing it, or you might not realize you have a medical problem that needs treatment. Finding out what's causing your pain will help your health care provider determine the best way to manage or treat it.

What are the types of pain?

Patterns and types of pain are named based on how long and how often you have pain. These include:

Acute pain usually happens suddenly because of a disease, injury, or inflammation (irritation, redness, and/or swelling). This type of pain is often sharp and acts as a warning that something is wrong. It usually goes away when the cause is treated or healed, though sometimes it can turn into chronic pain. Some examples of causes of acute pain include broken bones or dental issues.
Chronic pain lasts for longer than three months or the time in which you should have healed. It can affect all aspects of daily life, including your mood and relationships. Some conditions that might cause chronic pain include arthritis or back problems.
Episodic pain can happen from time to time and may occur with long-term medical conditions. Some conditions that might cause episodic pain include sickle cell disease or chronic migraines.

Pain may also be categorized by what is likely to be the cause of the pain. Pain may be described as nociceptive (caused by tissue damage or inflammation), neuropathic (caused by nerve damage), or nociplastic (caused by changes in how your nervous system processes pain).

What causes pain?

Understanding what causes pain and why people feel it differently may be difficult. Often, it's easier to find the cause of acute pain due to an injury than the cause of chronic pain, or you may have an ongoing cause of pain, such as cancer.

In some cases, there is no clear cause. Environmental factors and psychological factors such as stress and beliefs about pain may affect the way you feel pain and respond to treatment.

How is pain diagnosed?

You are the only one who knows how your pain feels. Your provider can best measure your pain by how you report it. They may ask you:

Where is the pain in your body?
How long have you had the pain?
How does the pain feel, such as stinging, burning, or sharp?
How often do you have pain?
When do you feel pain, such as in the morning, evening, or all the time?
What relieves the pain?
How does pain affect your daily life?
Is the pain mild, moderate, or severe?
To rate the pain on a scale.

If the cause of your pain is unknown, your provider may also do a physical exam and order blood tests or other medical tests to help find the cause.

What are the treatments for pain?

Pain is not always curable, but there are many ways to manage and treat it. Treatment depends on the cause and type of pain. Treatments may include medicines, such as pain relievers. There are also non-drug treatments, such as acupuncture, physical therapy, and sometimes surgery.

Depending on the cause of your pain and your symptoms, your provider may recommend lifestyle changes. These may include suggestions for:

Eating a healthy diet
Adding exercise
Losing weight
Managing stress
Improving mental health

NIH: National Institute of Neurological Disorders and Stroke