ICD-10-CM Code R94.131

Abnormal electromyogram [EMG]

Version 2021 Billable Code No Valid Principal Dx

Valid for Submission

R94.131 is a billable code used to specify a medical diagnosis of abnormal electromyogram [emg]. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code R94.131 might also be used to specify conditions or terms like anodal opening clonus, asymmetry of f-wave, asymmetry of h-response, cathodal closure clonus, cathodal opening clonus, complex repetitive emg discharges, etc

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.

ICD-10:R94.131
Short Description:Abnormal electromyogram [EMG]
Long Description:Abnormal electromyogram [EMG]

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code R94.131:

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

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code R94.131 are found in the index:


Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • 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 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 Groups

The ICD-10 code R94.131 is grouped in the following groups for version MS-DRG V38.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2020 through 09/30/2021.

  • 564 - OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH MCC
  • 565 - OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH CC
  • 566 - OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITHOUT CC/MCC

Convert R94.131 to ICD-9

  • 794.17 - Abnorm electromyogram

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)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients


Muscle Disorders

Also called: Myopathy

Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.

Causes of muscle disorders include

  • Injury or overuse, such as sprains or strains, cramps or tendinitis
  • A genetic disorder, such as muscular dystrophy
  • Some cancers
  • Inflammation, such as myositis
  • Diseases of nerves that affect muscles
  • Infections
  • Certain medicines

Sometimes the cause is not known.

  • Caring for muscle spasticity or spasms (Medical Encyclopedia)
  • Compartment syndrome (Medical Encyclopedia)
  • Contracture deformity (Medical Encyclopedia)
  • Creatine phosphokinase test (Medical Encyclopedia)
  • Electromyography (Medical Encyclopedia)
  • Eyelid twitch (Medical Encyclopedia)
  • Hypotonia (Medical Encyclopedia)
  • Muscle aches (Medical Encyclopedia)
  • Muscle atrophy (Medical Encyclopedia)
  • Muscle function loss (Medical Encyclopedia)
  • Muscle twitching (Medical Encyclopedia)
  • Rhabdomyolysis (Medical Encyclopedia)
  • Weakness (Medical Encyclopedia)

[Learn More]