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    v1.0.28
    OpenPayerBilling CodesSymptoms and signs involving the nervous and musculoskeletal systemsICD-10-CM r25-abnormal-involuntary-movements
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    ICD-10-CM Code For Abnormal Involuntary Movements: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group R25 includes movement disorder symptoms such as tremor, chorea, athetosis, and other abnormal involuntary movements that indicate dysfunction of motor control pathways. These ICD-10-CM diagnosis codes are used to document signs and symptoms observed during clinical evaluation, capturing severity, distribution, and functional impact of the abnormal movements. Accurate coding within the ICD-10-CM R25 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM R25: Abnormal Involuntary Movements Overview

    The ICD-10-CM R25 group covers abnormal involuntary movements such as tremors, chorea, athetosis, and other involuntary motor phenomena that originate from neurologic or neuromuscular dysfunction. These diagnoses target the nervous system and movement control pathways and are used to characterize movement abnormalities rather than specific underlying diseases. Accurate coding matters for appropriate clinical documentation and can affect reimbursement by clarifying the reason for evaluation and management related to movement disorders.

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    When to Use

    Use a code from this group when a patient presents with documented involuntary movements and the clinical record describes the type, distribution, or severity of the movement disorder. These codes are appropriate for reporting the symptom complex when a more specific causal diagnosis is not established or to accompany a definitive neurologic diagnosis.

    ICD-10-CM Codes

    6 rows

    ICD-10-CM CodeDescription
    R25.0Abnormal head movements
    R25.1Tremor, unspecified
    R25.2Cramp and spasm
    R25.3Fasciculation
    R25.8Other abnormal involuntary movements
    R25.9Unspecified abnormal involuntary movements

    DRG Codes

    3 rows

    DRG CodeDescription
    091Other Disorders of Nervous System with MCC
    092Other Disorders of Nervous System with CC
    093Other Disorders of Nervous System without CC/MCC

    Typical Clinical Scenarios

    • Elderly patient with sudden-onset, rhythmic jerking of one hand noticed by family and causing difficulty feeding and using utensils; brought to the emergency department for evaluation of new focal involuntary movements to rule out seizure, stroke, or metabolic causes. Neurological exam shows repetitive choreiform movements localized to the hand without loss of consciousness, and initial workup including labs and imaging is ordered; a diagnosis code for an abnormal involuntary movement is assigned to document the presenting sign. Typical codes: R25.1, R25.2
    • Middle-aged patient with a several-year history of slow, irregular writhing movements of the fingers and distal limbs that interfere with fine motor tasks and are worse with stress; they present to neurology for ongoing management of a chronic movement disorder. Because the movements are persistent and nonspecific choreoathetoid in nature without a definitive primary movement disorder diagnosis documented yet, a chronic abnormal involuntary movement code is used to capture the symptom complex. Typical codes: R25.2, R25.3
    • Hospitalized patient who develops sudden, brief, shock-like contractions of neck and shoulder muscles after initiation of a new antipsychotic medication; the acute onset dystonic reactions prompt bedside treatment and medication review. The involuntary muscle contractions are documented as an acute movement disturbance secondary to medication exposure and coded to reflect the acute abnormal involuntary movements complicating care. Typical codes: R25.0, R25.8

    Related Codes

    R26-ABNORMALITIES-OF-GAIT-AND-MOBILITY

    ICD-10-CM Code For Abnormalities Of Gait And Mobility: Group Overview

    R27-OTHER-LACK-OF-COORDINATION

    ICD-10-CM Code For Other Lack Of Coordination: Group Overview

    R29-OTHER-SYMPTOMS-NERVOUS-MUSCULOSKELETAL

    ICD-10-CM Code For Other Symptoms And Signs Involving The Nervous And Musculoskeletal Systems: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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