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Diagnosis Code

R94.131 ABNORMAL ELECTROMYOGRAM [EMG]


Code Information

Diagnosis Code: R94.131

Short Description: Abnormal electromyogram [EMG]

Long Description: Abnormal electromyogram [EMG]

The code R94.131 is VALID for claim submission

Code Classification:

  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99)
    • Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)
      • Abnormal results of function studies (R94)
        • R94.131 Abnormal electromyogram [EMG]

Code Version: 2022 ICD-10-CM


Synonyms

  • Anodal opening clonus
  • Asymmetry of F-wave
  • Asymmetry of H-response
  • Cathodal closure clonus
  • Cathodal opening clonus
  • Complex repetitive EMG discharges
  • Continuous motor unit activity
  • Decreased frequency of F-wave
  • Early recruitment of short duration polyphasic motor unit with abnormal spontaneous activity on electromyogram
  • Early recruitment of short duration polyphasic motor unit without abnormal spontaneous activity on electromyogram
  • Electrical EMG silence
  • Electromyogram abnormal
  • EMG decelerating bursts
  • EMG interference pattern - finding
  • EMG interference pattern - finding
  • EMG interference pattern - finding
  • EMG interference pattern - finding
  • EMG positive sharp waves
  • Exaggeration of H-response
  • F-wave finding
  • F-wave finding
  • F-wave finding
  • F-wave finding
  • F-wave finding
  • High amplitude reduced interference pattern with abnormal spontaneous activity on electromyogram
  • High amplitude reduced interference pattern without abnormal spontaneous activity on electromyogram
  • Increased chronodispersion of F-wave
  • Increased insertional activity
  • Increased latency of F-wave
  • Increased latency of H-response
  • Increased tacheodispersion of F-wave
  • Indeterminate EMG pattern
  • Interference pattern showing early recruitment
  • Interference pattern showing increased amplitude
  • Interference pattern showing reduced amplitude
  • Interference pattern showing reduced density
  • Loss of H-response
  • Motor unit characteristics - finding
  • Motor unit characteristics - finding
  • Motor unit characteristics - finding
  • Motor unit characteristics - finding
  • Motor unit characteristics - finding
  • Motor unit characteristics - finding
  • Motor unit morphology - finding
  • Motor unit morphology - finding
  • Motor unit morphology - finding
  • Motor unit morphology - finding
  • Motor unit stability - finding
  • Motor unit stability - finding
  • Motor units with extra discharges
  • Overall EMG pattern - finding
  • Overall EMG pattern - finding
  • Overall EMG pattern - finding
  • Overall EMG pattern - finding
  • Overall EMG pattern - finding
  • Overall EMG pattern - finding
  • Polyphasic units
  • Polyphasic units - long duration - finding
  • Polyphasic units - short duration - finding
  • Reaction of degeneration by electromyogram
  • Reaction of denervation by electromyogram
  • Single muscle fiber finding
  • Single muscle fiber jitter
  • Spontaneous EMG activity
  • Stable motor units
  • Stalberg cloud
  • Unstable motor units

Diagnostic Related Group(s)

The code R94.131 is grouped in the following Diagnostic Related Group(s) (MS-DRG v39.0)
  • Other Musculoskeletal System And Connective Tissue Diagnoses With Mcc (564)
  • Other Musculoskeletal System And Connective Tissue Diagnoses With Cc (565)
  • Other Musculoskeletal System And Connective Tissue Diagnoses Without Cc/mcc (566)

References to Index of Diseases and Injuries

The code R94.131 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Type 1 Excludes Notes:
    • electromyogram of eye (@R94.113*)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
R94.131 Right Arrow 794.17 Abnorm electromyogram

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
R94 Abnormal results of function studies
R94.0 Abnormal results of function studies of central nervous system
R94.01 Abnormal electroencephalogram [EEG]
R94.02 Abnormal brain scan
R94.09 Abnormal results of other function studies of central nervous system
R94.1 Abnormal results of function studies of peripheral nervous system and special senses
R94.11 Abnormal results of function studies of eye
R94.110 Abnormal electro-oculogram [EOG]
R94.111 Abnormal electroretinogram [ERG]
R94.112 Abnormal visually evoked potential [VEP]
R94.113 Abnormal oculomotor study
R94.118 Abnormal results of other function studies of eye
R94.12 Abnormal results of function studies of ear and other special senses
R94.120 Abnormal auditory function study
R94.121 Abnormal vestibular function study
R94.128 Abnormal results of other function studies of ear and other special senses
R94.13 Abnormal results of function studies of peripheral nervous system
R94.130 Abnormal response to nerve stimulation, unspecified
R94.138 Abnormal results of other function studies of peripheral nervous system
R94.2 Abnormal results of pulmonary function studies
R94.3 Abnormal results of cardiovascular function studies
R94.30 Abnormal result of cardiovascular function study, unspecified
R94.31 Abnormal electrocardiogram [ECG] [EKG]
R94.39 Abnormal result of other cardiovascular function study
R94.4 Abnormal results of kidney function studies
R94.5 Abnormal results of liver function studies
R94.6 Abnormal results of thyroid function studies
R94.7 Abnormal results of other endocrine function studies
R94.8 Abnormal results of function studies of other organs and systems

This page was last updated on: 10/1/2023

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