2024 ICD-10-CM Diagnosis Code G51.4
Facial myokymia
- ICD-10-CM Code:
- G51.4
- ICD-10 Code for:
- Facial myokymia
- Is Billable?
- Yes - Valid for Submission
- Chronic Condition Indicator: [1]
- Chronic
- Code Navigator:
G51.4 is a billable diagnosis code used to specify a medical diagnosis of facial myokymia. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Benign facial fasciculation
- Facial myokymia
- Facial myokymia
- Familial dyskinesia and facial myokymia
- Myokymia
- Myokymia of eyelid
- Myokymia of left facial muscle
- Myokymia of left superior oblique muscle
- Myokymia of right facial muscle
- Myokymia of right superior oblique muscle
- Myopathy of extraocular muscle of left eye
- Myopathy of extraocular muscle of right eye
- Superior oblique myokymia
Clinical Classification
Clinical Category is Nerve and nerve root disorders
- CCSR Category Code: NVS017
- Inpatient Default CCSR: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.
- Outpatient Default CCSR: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.
Clinical Information
Facial Nerve Diseases
diseases of the facial nerve or nuclei. pontine disorders may affect the facial nuclei or nerve fascicle. the nerve may be involved intracranially, along its course through the petrous portion of the temporal bone, or along its extracranial course. clinical manifestations include facial muscle weakness, loss of taste from the anterior tongue, hyperacusis, and decreased lacrimation.Hemifacial Spasm
recurrent clonic contraction of facial muscles, restricted to one side. it may occur as a manifestation of compressive lesions involving the seventh cranial nerve (facial nerve diseases), during recovery from bell palsy, or in association with other disorders. (from adams et al., principles of neurology, 6th ed, p1378)Isaacs Syndrome
a rare neuromuscular disorder with onset usually in late childhood or early adulthood, characterized by intermittent or continuous widespread involuntary muscle contractions; fasciculation; hyporeflexia; muscle cramp; muscle weakness; hyperhidrosis; tachycardia; and myokymia. involvement of pharyngeal or laryngeal muscles may interfere with speech and breathing. the continuous motor activity persists during sleep and general anesthesia (distinguishing this condition from stiff-person syndrome). familial and acquired (primarily autoimmune) forms have been reported. (from ann ny acad sci 1998 may 13;841:482-496; adams et al., principles of neurology, 6th ed, p1491)Myokymia
successive and rapid contractions of motor units associated with chronic nerve injury. the discharges arise from the peripheral aspects of regenerating nerves, and clinically impart a nearly continuous undulation of the body surface overlying the muscle. (adams et al., principles of neurology, 6th ed, p1491)Trochlear Nerve Diseases
diseases of the fourth cranial (trochlear) nerve or its nucleus in the midbrain. the nerve crosses as it exits the midbrain dorsally and may be injured along its course through the intracranial space, cavernous sinus, superior orbital fissure, or orbit. clinical manifestations include weakness of the superior oblique muscle which causes vertical diplopia that is maximal when the affected eye is adducted and directed inferiorly. head tilt may be seen as a compensatory mechanism for diplopia and rotation of the visual axis. common etiologies include craniocerebral trauma and infratentorial neoplasms.Myokymia
a disorder characterized by involuntary and irregular muscle contractions not associated with muscle weakness or atrophy. it most often affects facial muscles. it may be localized or generalized.
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).
- - Myokymia, facial - G51.4
Convert G51.4 to ICD-9-CM
- ICD-9-CM Code: 351.8 - Facial nerve dis NEC
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
Facial Injuries and Disorders
Face injuries and disorders can cause pain and affect how you look. In severe cases, they can affect sight, speech, breathing and your ability to swallow. Fractures (broken bones), especially in the bones of your nose, cheekbone and jaw, are common facial injuries.
Certain diseases also lead to facial disorders. For example, nerve diseases like trigeminal neuralgia or Bell's palsy sometimes cause facial pain, spasms and trouble with eye or facial movement. Birth defects can also affect the face. They can cause underdeveloped or unusually prominent facial features or a lack of facial expression. Cleft lip and palate are a common facial birth defect.
[Learn More in MedlinePlus]
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.