S85.409A - Unspecified injury of lesser saphenous vein at lower leg level, unspecified leg, initial encounter

Version 2023
ICD-10:S85.409A
Short Description:Unsp inj less saphenous at lower leg level, unsp leg, init
Long Description:Unspecified injury of lesser saphenous vein at lower leg level, unspecified leg, initial encounter
Status: Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Injuries to the knee and lower leg (S80-S89)
      • Injury of blood vessels at lower leg level (S85)

S85.409A is a billable ICD-10 code used to specify a medical diagnosis of unspecified injury of lesser saphenous vein at lower leg level, unspecified leg, initial encounter. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.

S85.409A is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like unspecified injury of lesser saphenous vein at lower leg level unspecified leg. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.

Unspecified diagnosis codes like S85.409A 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.

Approximate Synonyms

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

Coding Guidelines

The appropriate 7th character is to be added to each code from block Injury of blood vessels at lower leg level (S85). Use the following options for the aplicable episode of care:

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:

Convert to ICD-9 Code

Source ICD-10 CodeTarget ICD-9 Code
S85.409A904.3 - Injury saphenous vein
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


Leg Injuries and Disorders

Your legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, falling, or having an accident can damage your legs. Common leg injuries include sprains and strains, joint dislocations, and fractures (broken bones).

These injuries can affect the entire leg, or just the foot, ankle, knee, or hip. Certain diseases also lead to leg problems. For example, knee osteoarthritis, common in older people, can cause pain and limited motion. Problems in your veins in your legs can lead to varicose veins or deep vein thrombosis.


[Learn More in MedlinePlus]

Vascular Diseases

What are vascular diseases?

Your vascular system is your body's network of blood vessels. It includes your:

Vascular diseases are conditions which affect your vascular system. They are common and can be serious. Some types include:

What causes vascular diseases?

The causes of vascular diseases depend on the specific disease. These causes include:

Sometimes the cause is unknown.

Who is at risk for vascular diseases?

The risk factors for vascular diseases can vary, depending on the specific disease. But some of the more common risk factors include:

What are the symptoms of vascular diseases?

The symptoms for each disease are different.

How are vascular diseases diagnosed?

To make a diagnosis, your health care provider will do a physical exam and ask about your symptoms and medical history. You may have imaging tests and/or blood tests.

How are vascular diseases treated?

Which treatment you get depends on which vascular disease you have and how severe it is. Types of treatments for vascular diseases include:

Can vascular diseases be prevented?

There are steps you can take to help prevent vascular diseases:


[Learn More in MedlinePlus]

Code History