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  6. 2026 ICD-10-CM Code R25.1

2026 ICD-10-CM Diagnosis Code R25.1

Tremor, unspecified

ICD-10-CM Code:
R25.1
ICD-10 Code for:
Tremor, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

R25.1 is a billable diagnosis code used to specify a medical diagnosis of tremor, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.

Unspecified diagnosis codes like R25.1 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.

Code Classification

  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
    R00–R99
    • Symptoms and signs involving the nervous and musculoskeletal systems
      R25-R29
      • Abnormal involuntary movements
        R25

Approximate Synonyms

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

  • Aspergillus clavatus tremors
  • Bilateral outstretched hands tremor
  • Chronic tremor
  • Coarse tremor
  • Continuous tremor
  • Enhanced physiological tremor
  • Fine tremor
  • Hand tremor
  • Intermittent tremor
  • Lip tremor
  • Massive tremor
  • Passive tremor
  • Persistent tremor
  • Physiological tremor
  • Trembles
  • Tremor
  • Tremor due to central nervous system disease
  • Tremor due to orthostatic hypotension
  • Tremor due to pheochromocytoma
  • Tremor due to substance withdrawal
  • Tremor of limb

Clinical Classification

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

Nervous system signs and symptoms

CCSR Code: SYM010

Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Ataxia

    impairment of the ability to perform smoothly coordinated voluntary movements. this condition may affect the limbs, trunk, eyes, pharynx, larynx, and other structures. ataxia may result from impaired sensory or motor function. sensory ataxia may result from posterior column injury or peripheral nerve diseases. motor ataxia may be associated with cerebellar diseases; cerebral cortex diseases; thalamic diseases; basal ganglia diseases; injury to the red nucleus; and other conditions.

  • Essential Tremor

    a relatively common disorder characterized by a fairly specific pattern of tremors which are most prominent in the upper extremities and neck, inducing titubations of the head. the tremor is usually mild, but when severe may be disabling. an autosomal dominant pattern of inheritance may occur in some families (i.e., familial tremor). (mov disord 1988;13(1):5-10)

  • Tremor

    cyclical movement of a body part that can represent either a physiologic process or a manifestation of disease. intention or action tremor, a common manifestation of cerebellar diseases, is aggravated by movement. in contrast, resting tremor is maximal when there is no attempt at voluntary movement, and occurs as a relatively frequent manifestation of parkinson disease.

  • Tremorine

    cyclical movement of a body part that can represent either a physiologic process or a manifestation of disease. intention or action tremor, a common manifestation of cerebellar diseases, is aggravated by movement. in contrast, resting tremor is maximal when there is no attempt at voluntary movement, and occurs as a relatively frequent manifestation of parkinson disease.

Tabular List of Diseases and Injuries

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


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.

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).

Index of External Cause of Injuries

References found for this diagnosis code in the External Cause of Injuries Index:

    • Abnormal, abnormality, abnormalities
      • movement (disorder)
        • involuntary
          • tremor
    • Hemitremor
    • Tremor(s)

Convert R25.1 to ICD-9-CM

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

Abn involun movement NEC

ICD-9-CM: 781.0

Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.

View Conversion

Patient Education


Tremor

What is a tremor?

A tremor is a neurological condition that includes shaking or trembling movements in one or more parts of your body. It most often affects the hands. But it can also affect the arms, legs, head, vocal cords, and torso (trunk). A tremor is involuntary, meaning that you cannot control it. It happens because of muscle contractions.

A tremor may come and go, or it may be constant. It can happen on its own or be caused by another disorder. It is not life threatening, but it may cause challenges. It can make it hard to do daily life tasks such as writing, typing, eating, and dressing. In some cases, a tremor can even lead to disabilities.

What are the types of tremor?

There are several types of tremor, including:

  • Essential tremor, sometimes called benign essential tremor or familial tremor. This is the most common type. It usually affects both your hands and arms while you are moving them. It can also affect your head, voice, or legs.
  • Parkinsonian tremor, which is a common symptom in people who have Parkinson's disease. It usually affects one or both hands when they are at rest, but it can affect the chin, lips, face, and legs.
  • Dystonic tremor, which happens in people who have dystonia. Dystonia is a movement disorder in which you have involuntary muscle contractions. The contractions cause you to have twisting and repetitive movements. It can affect any muscle in the body.

What causes tremor?

Generally, tremor is caused by a problem in the deep parts of the brain that control movements. For most types, the cause is unknown. Some types are inherited and run in families. There can also be other causes, such as:

  • Neurologic disorders, including multiple sclerosis, Parkinson's disease, stroke, and traumatic brain injury
  • Certain medicines, such as asthma medicines, chemotherapy, corticosteroids, and medicines used for certain psychiatric and neurological disorders
  • Alcohol use disorder (AUD) or alcohol withdrawal
  • Poisoning from certain toxic substances, including pesticides and heavy metals such as mercury and lead
  • Hyperthyroidism (overactive thyroid)
  • Liver or kidney failure
  • Anxiety or panic
  • Too much caffeine

Who is at risk for tremor?

Anyone can get tremor, but it is most common in middle-aged and older adults. For certain types of tremor, having a family history raises your risk of getting it.

What are the symptoms of tremor?

Symptoms of tremor may include:

  • Rhythmic shaking in the hands, arms, head, legs, or torso
  • Shaky voice
  • Difficulty writing or drawing
  • Problems holding and controlling utensils, such as a spoon

How is tremor diagnosed?

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

  • A medical history, which includes asking about your symptoms
  • A physical exam, which includes checking:
    • Whether the tremor happens when the muscles are at rest or in action
    • The location of the tremor
    • How often you have the tremor and how strong it is
  • A neurological exam, including checking for:
    • Problems with balance
    • Problems with speech
    • Increased muscle stiffness
  • Blood or urine tests to look for the cause
  • Imaging tests to help figure out if the cause is damage to your brain
  • Tests that check your abilities to do daily tasks such as handwriting and holding a fork or cup
  • An electromyogram, a test that measures involuntary muscle activity and how your muscles respond to nerve stimulation

What are the treatments for tremor?

There is no cure for most forms of tremor, but there are treatments to help manage symptoms. In some cases, the symptoms may be so mild that you do not need treatment.

Finding the right treatment depends on getting the right diagnosis of the cause. Tremor caused by another medical condition may get better or go away when you treat that condition. If your tremor is caused by a certain medicine, stopping that medicine usually makes the tremor go away.

Treatments for tremor can include:

  • Medicines. There are different medicines for the specific types of tremor. Another option is Botox injections, which can treat several different types of tremor.
  • Surgery may be used for severe cases that do not get better with medicines. The most common type is deep brain stimulation (DBS). DBS uses electrodes that are implanted in the brain. The electrodes send electrical pulses to the parts of the brain that are causing the tremor.
  • Physical, speech-language, and occupational therapy, which may help to control tremor and deal with the daily challenges caused by the tremor.

If you find that caffeine and other stimulants trigger your tremors, it may be helpful to cut them from your diet.

NIH: National Institute of Neurological Disorders and Stroke


[Learn More in MedlinePlus]

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • 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] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.