2024 ICD-10-CM Diagnosis Code F16.121

Hallucinogen abuse with intoxication with delirium

ICD-10-CM Code:
F16.121
ICD-10 Code for:
Hallucinogen abuse with intoxication with delirium
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Chronic
Code Navigator:

Code Classification

  • Mental and behavioural disorders
    (F01–F99)
    • Mental and behavioral disorders due to psychoactive substance use
      (F10-F19)
      • Hallucinogen related disorders
        (F16)

F16.121 is a billable diagnosis code used to specify a medical diagnosis of hallucinogen abuse with intoxication with delirium. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Clinical Classification

Index to Diseases and Injuries References

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

Convert F16.121 to ICD-9-CM

  • ICD-9-CM Code: 292.81 - Drug-induced delirium
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


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:

  • Hypoactive, where you are not active and seem sleepy, tired, or depressed
  • Hyperactive, where you are restless or agitated
  • Mixed, where you change back and forth between being hypoactive and hyperactive

What causes delirium?

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

  • Alcohol or drugs, either from intoxication or withdrawal. This includes a serious type of alcohol withdrawal syndrome called delirium tremens. It usually happens to people who stop drinking after years of alcohol abuse.
  • Dehydration and electrolyte imbalances
  • Dementia
  • Hospitalization, especially in intensive care
  • Infections, such as urinary tract infections, pneumonia, and the flu
  • Medicines. This could be a side effect of a medicine, such as sedatives or opioids. Or it could be withdrawal after stopping a medicine.
  • Metabolic disorders
  • Organ failure, such as kidney or liver failure
  • Poisoning
  • Serious illnesses
  • Severe pain
  • Sleep deprivation
  • Surgeries, including reactions to anesthesia

Who is at risk for delirium?

Certain factors put you at risk for delirium, including:

  • Being in a hospital or nursing home
  • Dementia
  • Having a serious illness or more than one illness
  • Having an infection
  • Older age
  • Surgery
  • Taking medicines that affect the mind or behavior
  • Taking high doses of pain medicines, such as opioids

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:

  • Changes in alertness (usually more alert in the morning, less at night)
  • Changing levels of consciousness
  • Confusion
  • Disorganized thinking, talking in a way that doesn't make sense
  • Disrupted sleep patterns, sleepiness
  • Emotional changes: anger, agitation, depression, irritability, overexcitement
  • Hallucinations and delusions
  • Incontinence
  • Memory problems, especially with short-term memory
  • Trouble concentrating

How is delirium diagnosed?

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

  • A medical history, which includes asking about your symptoms
  • Physical and neurological exams
  • Mental status testing
  • Lab and diagnostic imaging tests

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:

  • Controlling the environment, which includes making sure that the room is quiet and well-lit, having clocks or calendars in view, and having family members around
  • Medicines, including those that control aggression or agitation and pain relievers if there is pain
  • If needed, making sure that the person has a hearing aid, glasses, or other devices for communication

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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Drug Use and Addiction

What are drugs?

Drugs are chemical substances that can change how your body and mind work. They include prescription medicines, over-the-counter medicines, alcohol, tobacco, and illegal drugs.

What is drug use?

Drug use, or misuse, includes:

  • Using illegal substances, such as
    • Anabolic steroids
    • Club drugs
    • Cocaine
    • Heroin
    • Inhalants
    • Marijuana
    • Methamphetamines
  • Misusing prescription medicines, including opioids. This means taking the medicines in a different way than the health care provider prescribed. This includes
    • Taking a medicine that was prescribed for someone else
    • Taking a larger dose than you are supposed to
    • Using the medicine in a different way than you are supposed to. For example, instead of swallowing your tablets, you might crush and then snort or inject them.
    • Using the medicine for another purpose, such as getting high
  • Misusing over-the-counter medicines, including using them for another purpose and using them in a different way than you are supposed to

Drug use is dangerous. It can harm your brain and body, sometimes permanently. It can hurt the people around you, including friends, families, kids, and unborn babies. Drug use can also lead to addiction.

What is drug addiction?

Drug addiction is a chronic brain disease. It causes a person to take drugs repeatedly, despite the harm they cause. Repeated drug use can change the brain and lead to addiction.

The brain changes from addiction can be lasting, so drug addiction is considered a "relapsing" disease. This means that people in recovery are at risk for taking drugs again, even after years of not taking them.

Does everyone who takes drugs become addicted?

Not everyone who uses drugs becomes addicted. Everyone's bodies and brains are different, so their reactions to drugs can also be different. Some people may become addicted quickly, or it may happen over time. Other people never become addicted. Whether or not someone becomes addicted depends on many factors. They include genetic, environmental, and developmental factors.

Who is at risk for drug addiction?

Various risk factors can make you more likely to become addicted to drugs, including:

  • Your biology. People can react to drugs differently. Some people like the feeling the first time they try a drug and want more. Others hate how it feels and never try it again.
  • Mental health problems. People who have untreated mental health problems, such as depression, anxiety, or attention deficit/hyperactivity disorder (ADHD) are more likely to become addicted. This can happen because drug use and mental health problems affect the same parts of the brain. Also, people with these problems may use drugs to try to feel better.
  • Trouble at home. If your home is an unhappy place or was when you were growing up, you might be more likely to have a drug problem.
  • Trouble in school, at work, or with making friends. You might use drugs to get your mind off these problems.
  • Hanging around other people who use drugs. They might encourage you to try drugs.
  • Starting drug use when you're young. When kids use drugs, it affects how their bodies and brains finish growing. This increases your chances of becoming addicted when you're an adult.

What are the signs that someone has a drug problem?

Signs that someone has a drug problem include:

  • Changing friends a lot
  • Spending a lot of time alone
  • Losing interest in favorite things
  • Not taking care of themselves - for example, not taking showers, changing clothes, or brushing their teeth
  • Being really tired and sad
  • Eating more or eating less than usual
  • Being very energetic, talking fast, or saying things that don't make sense
  • Being in a bad mood
  • Quickly changing between feeling bad and feeling good
  • Sleeping at strange hours
  • Missing important appointments
  • Having problems at work or at school
  • Having problems in personal or family relationships

What are the treatments for drug addiction?

Treatments for drug addiction include counseling, medicines, or both. Research shows that combining medicines with counseling gives most people the best chance of success.

The counseling may be individual, family, and/or group therapy. It can help you:

  • Understand why you got addicted
  • See how drugs changed your behavior
  • Learn how to deal with your problems so you won't go back to using drugs
  • Learn to avoid places, people, and situations where you might be tempted to use drugs

Medicines can help with the symptoms of withdrawal. For addiction to certain drugs, there are also medicines that can help you re-establish normal brain function and decrease your cravings.

If you have a mental disorder along with an addiction, it is known as a dual diagnosis. It is important to treat both problems. This will increase your chance of success.

If you have a severe addiction, you may need hospital-based or residential treatment. Residential treatment programs combine housing and treatment services.

Can drug use and addiction be prevented?

Drug use and addiction are preventable. Prevention programs involving families, schools, communities, and the media may prevent or reduce drug use and addiction. These programs include education and outreach to help people understand the risks of drug use.

NIH: National Institute on Drug Abuse


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Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.