ICD-10 Code S56.406

Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level

Version 2019 Non-Billable Code

Not Valid for Submission

S56.406 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10: S56.406
Short Description:Unsp inj extensor musc/fasc/tend l rng fngr at forarm lv
Long Description:Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level

Consider the following ICD-10 codes with a higher level of specificity:

  • S56.406A - Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level, initial encounter
  • S56.406D - Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level, subsequent encounter
  • S56.406S - Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level, sequela

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)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (first year ICD-10-CM implemented into the HIPAA mandated 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

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.


[Learn 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.