2021 ICD-10-CM Code S46.399

Other injury of muscle, fascia and tendon of triceps, unspecified arm

Version 2021
Non-Billable Code
Unspecified Code

Not Valid for Submission

S46.399 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other injury of muscle, fascia and tendon of triceps, unspecified arm. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

The ICD-10-CM code S46.399 might also be used to specify conditions or terms like complete division, triceps tendon, injury of tendon of triceps brachii, injury of tendon of triceps brachii or partial division, triceps tendon.

Unspecified diagnosis codes like S46.399 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

ICD-10:S46.399
Short Description:Oth injury of muscle, fascia and tendon of triceps, unsp arm
Long Description:Other injury of muscle, fascia and tendon of triceps, unspecified arm

Code Classification

Specific Coding for Oth injury of muscle, fascia and tendon of triceps, unsp arm

Header codes like S46.399 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for oth injury of muscle, fascia and tendon of triceps, unsp arm:

Approximate Synonyms

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

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

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


[Learn More in MedlinePlus]

Code History

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