Version 2024

2024 ICD-10-CM Diagnosis Code M66.2

Spontaneous rupture of extensor tendons

ICD-10-CM Code:
M66.2
ICD-10 Code for:
Spontaneous rupture of extensor tendons
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the musculoskeletal system and connective tissue
    (M00–M99)
    • Disorders of synovium and tendon
      (M65-M67)
      • Spontaneous rupture of synovium and tendon
        (M66)

M66.2 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of spontaneous rupture of extensor tendons. The code is not specific and is NOT valid for the year 2024 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.

Specific Coding Applicable to Spontaneous rupture of extensor tendons

Non-specific codes like M66.2 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for spontaneous rupture of extensor tendons:

  • Use M66.20 for Spontaneous rupture of extensor tendons, unspecified site - BILLABLE CODE

  • M66.21 for Spontaneous rupture of extensor tendons, shoulder - NON-BILLABLE CODE

  • Use M66.211 for Spontaneous rupture of extensor tendons, right shoulder - BILLABLE CODE

  • Use M66.212 for Spontaneous rupture of extensor tendons, left shoulder - BILLABLE CODE

  • Use M66.219 for Spontaneous rupture of extensor tendons, unspecified shoulder - BILLABLE CODE

  • M66.22 for Spontaneous rupture of extensor tendons, upper arm - NON-BILLABLE CODE

  • Use M66.221 for Spontaneous rupture of extensor tendons, right upper arm - BILLABLE CODE

  • Use M66.222 for Spontaneous rupture of extensor tendons, left upper arm - BILLABLE CODE

  • Use M66.229 for Spontaneous rupture of extensor tendons, unspecified upper arm - BILLABLE CODE

  • M66.23 for Spontaneous rupture of extensor tendons, forearm - NON-BILLABLE CODE

  • Use M66.231 for Spontaneous rupture of extensor tendons, right forearm - BILLABLE CODE

  • Use M66.232 for Spontaneous rupture of extensor tendons, left forearm - BILLABLE CODE

  • Use M66.239 for Spontaneous rupture of extensor tendons, unspecified forearm - BILLABLE CODE

  • M66.24 for Spontaneous rupture of extensor tendons, hand - NON-BILLABLE CODE

  • Use M66.241 for Spontaneous rupture of extensor tendons, right hand - BILLABLE CODE

  • Use M66.242 for Spontaneous rupture of extensor tendons, left hand - BILLABLE CODE

  • Use M66.249 for Spontaneous rupture of extensor tendons, unspecified hand - BILLABLE CODE

  • M66.25 for Spontaneous rupture of extensor tendons, thigh - NON-BILLABLE CODE

  • Use M66.251 for Spontaneous rupture of extensor tendons, right thigh - BILLABLE CODE

  • Use M66.252 for Spontaneous rupture of extensor tendons, left thigh - BILLABLE CODE

  • Use M66.259 for Spontaneous rupture of extensor tendons, unspecified thigh - BILLABLE CODE

  • M66.26 for Spontaneous rupture of extensor tendons, lower leg - NON-BILLABLE CODE

  • Use M66.261 for Spontaneous rupture of extensor tendons, right lower leg - BILLABLE CODE

  • Use M66.262 for Spontaneous rupture of extensor tendons, left lower leg - BILLABLE CODE

  • Use M66.269 for Spontaneous rupture of extensor tendons, unspecified lower leg - BILLABLE CODE

  • M66.27 for Spontaneous rupture of extensor tendons, ankle and foot - NON-BILLABLE CODE

  • Use M66.271 for Spontaneous rupture of extensor tendons, right ankle and foot - BILLABLE CODE

  • Use M66.272 for Spontaneous rupture of extensor tendons, left ankle and foot - BILLABLE CODE

  • Use M66.279 for Spontaneous rupture of extensor tendons, unspecified ankle and foot - BILLABLE CODE

  • Use M66.28 for Spontaneous rupture of extensor tendons, other site - BILLABLE CODE

  • Use M66.29 for Spontaneous rupture of extensor tendons, multiple sites - BILLABLE CODE

Patient Education


Sprains and Strains

A sprain is a stretched or torn ligament. Ligaments are tissues that connect bones at a joint. Falling, twisting, or getting hit can all cause a sprain. Ankle and wrist sprains are common. Symptoms include pain, swelling, bruising, and being unable to move your joint. You might feel a pop or tear when the injury happens.

A strain is a stretched or torn muscle or tendon. Tendons are tissues that connect muscle to bone. Twisting or pulling these tissues can cause a strain. Strains can happen suddenly or develop over time. Back and hamstring muscle strains are common. Many people get strains playing sports. Symptoms include pain, muscle spasms, swelling, and trouble moving the muscle.

At first, treatment of both sprains and strains usually involves resting the injured area, icing it, wearing a bandage or device that compresses the area, and medicines. Later treatment might include exercise and physical therapy.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.