ICD-10 Diagnosis Code R94.131

Abnormal electromyogram [EMG]

Diagnosis Code R94.131

ICD-10: R94.131
Short Description: Abnormal electromyogram [EMG]
Long Description: Abnormal electromyogram [EMG]
This is the 2018 version of the ICD-10-CM diagnosis code R94.131

Valid for Submission
The code R94.131 is valid for submission for HIPAA-covered transactions.

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)

Information for Medical Professionals

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.

Diagnostic Related Groups
The diagnosis code R94.131 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)

  • 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 to ICD-9
  • 794.17 - Abnorm electromyogram

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 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

Index to Diseases and Injuries
References found for the code R94.131 in the Index to Diseases and Injuries:


Tabular List of Diseases and Injuries
References found for the code R94.131 in the Tabular List of Diseases and Injuries:

  • Type 1 Excludes Notes:
    • electromyogram of eye (R94.113)

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)

[Read More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Index of Diseases and Injuries Definitions

  • And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
  • Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
  • Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • Type 1 Excludes Notes - 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.
  • Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • Inclusion terms - List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
  • NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
  • See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
  • See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
  • 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.

Present on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

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