ICD-10 Diagnosis Code S56.491

Inj extensor musc/fasc/tend r idx fngr at forearm level

Diagnosis Code S56.491

ICD-10: S56.491
Short Description: Inj extensor musc/fasc/tend r idx fngr at forearm level
Long Description: Other injury of extensor muscle, fascia and tendon of right index finger at forearm level
This is the 2018 version of the ICD-10-CM diagnosis code S56.491

Not Valid for Submission
The code S56.491 is a "header" and not valid for submission for HIPAA-covered transactions.

Code Classification
  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Injuries to the elbow and forearm (S50-S59)
      • Injury of muscle, fascia and tendon at forearm level (S56)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code S56.491 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)

  • 913 - TRAUMATIC INJURY WITH MCC
  • 913 - TRAUMATIC INJURY WITH MCC
  • 914 - TRAUMATIC INJURY WITHOUT MCC
  • 914 - TRAUMATIC INJURY WITHOUT MCC
  • 949 - AFTERCARE WITH CC/MCC
  • 950 - AFTERCARE WITHOUT CC/MCC

Information for Patients


Arm Injuries and Disorders

Of the 206 bones in your body, three of them are in your arm: the humerus, radius, and ulna. Your arms are also made up of muscles, joints, tendons, and other connective tissue. Injuries to any of these parts of the arm can occur during sports, a fall, or an accident.

Types of arm injuries include

  • Tendinitis and bursitis
  • Sprains
  • Dislocations
  • Broken bones
  • Nerve problems
  • Osteoarthritis

You may also have problems or injure specific parts of your arm, such as your hand, wrist, elbow, or shoulder.

  • Arm CT scan (Medical Encyclopedia)
  • Brachial plexopathy (Medical Encyclopedia)
  • Radial head fracture - aftercare (Medical Encyclopedia)
  • Radial nerve dysfunction (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.

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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