1. Home
  2. ICD-10-CM Codes
  3. M00–M99
  4. M65-M67
  5. M66
  6. 2024 ICD-10-CM Code M66.8
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code M66.8

Spontaneous rupture of other tendons

ICD-10-CM Code:
M66.8
ICD-10 Code for:
Spontaneous rupture of other 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)

M66.8 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 other 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 other tendons

Non-specific codes like M66.8 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 other tendons:

  • Use M66.80 for Spontaneous rupture of other tendons, unspecified site - BILLABLE CODE

  • M66.81 for Spontaneous rupture of other tendons, shoulder - NON-BILLABLE CODE

  • Use M66.811 for Spontaneous rupture of other tendons, right shoulder - BILLABLE CODE

  • Use M66.812 for Spontaneous rupture of other tendons, left shoulder - BILLABLE CODE

  • Use M66.819 for Spontaneous rupture of other tendons, unspecified shoulder - BILLABLE CODE

  • M66.82 for Spontaneous rupture of other tendons, upper arm - NON-BILLABLE CODE

  • Use M66.821 for Spontaneous rupture of other tendons, right upper arm - BILLABLE CODE

  • Use M66.822 for Spontaneous rupture of other tendons, left upper arm - BILLABLE CODE

  • Use M66.829 for Spontaneous rupture of other tendons, unspecified upper arm - BILLABLE CODE

  • M66.83 for Spontaneous rupture of other tendons, forearm - NON-BILLABLE CODE

  • Use M66.831 for Spontaneous rupture of other tendons, right forearm - BILLABLE CODE

  • Use M66.832 for Spontaneous rupture of other tendons, left forearm - BILLABLE CODE

  • Use M66.839 for Spontaneous rupture of other tendons, unspecified forearm - BILLABLE CODE

  • M66.84 for Spontaneous rupture of other tendons, hand - NON-BILLABLE CODE

  • Use M66.841 for Spontaneous rupture of other tendons, right hand - BILLABLE CODE

  • Use M66.842 for Spontaneous rupture of other tendons, left hand - BILLABLE CODE

  • Use M66.849 for Spontaneous rupture of other tendons, unspecified hand - BILLABLE CODE

  • M66.85 for Spontaneous rupture of other tendons, thigh - NON-BILLABLE CODE

  • Use M66.851 for Spontaneous rupture of other tendons, right thigh - BILLABLE CODE

  • Use M66.852 for Spontaneous rupture of other tendons, left thigh - BILLABLE CODE

  • Use M66.859 for Spontaneous rupture of other tendons, unspecified thigh - BILLABLE CODE

  • M66.86 for Spontaneous rupture of other tendons, lower leg - NON-BILLABLE CODE

  • Use M66.861 for Spontaneous rupture of other tendons, right lower leg - BILLABLE CODE

  • Use M66.862 for Spontaneous rupture of other tendons, left lower leg - BILLABLE CODE

  • Use M66.869 for Spontaneous rupture of other tendons, unspecified lower leg - BILLABLE CODE

  • M66.87 for Spontaneous rupture of other tendons, ankle and foot - NON-BILLABLE CODE

  • Use M66.871 for Spontaneous rupture of other tendons, right ankle and foot - BILLABLE CODE

  • Use M66.872 for Spontaneous rupture of other tendons, left ankle and foot - BILLABLE CODE

  • Use M66.879 for Spontaneous rupture of other tendons, unspecified ankle and foot - BILLABLE CODE

  • Use M66.88 for Spontaneous rupture of other tendons, other sites - BILLABLE CODE

  • Use M66.89 for Spontaneous rupture of other 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.