The M79.10 Diagnosis Code is a critical component of the International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) system, specifically used to classify and code for Myalgia, unspecified site. This code falls under the category of “Other and unspecified soft tissue disorders, not elsewhere classified” (M70-M79) and more precisely within the “Myalgia” subcategory (M79.1).
M79.10 is designated as a billable/specific code, meaning it is precise enough to be used on medical claims for reimbursement purposes. The code officially became effective in the ICD-10-CM system in 2019 and has remained unchanged through the 2025 edition, which became active on October 1, 2024. It’s important to note that M79.10 is the American ICD-10-CM version, and international adaptations of ICD-10 M79.10 might present variations.
Within the ICD-10-CM framework, M79.10, like other codes, may have annotation back-references. These references point to other codes containing crucial annotations such as ‘Applicable To’, ‘Code Also’, ‘Code First’, ‘Excludes1’, ‘Excludes2’, ‘Includes’, ‘Note’, or ‘Use Additional’ instructions that could be relevant when coding with M79.10.
Furthermore, ICD-10-CM code M79.10 is categorized within Diagnostic Related Groups (MS-DRG v42.0). Looking back at its code history, M79.10 was introduced as a new code in 2019, effective from October 1, 2018. There have been no modifications to this code in subsequent years (2020, 2021, 2022, 2023, 2024, and 2025).
For those navigating the ICD-10-CM index, it’s useful to see the codes adjacent to M79.10. These include codes ranging from M77.42 (Enthesopathy of left foot) to M79.601 (Pain in right arm), providing a broader context within the musculoskeletal disorders classification. Using ICD-10-CM codes, including M79.10, is mandatory for reimbursement claims with a service date on or after October 1, 2015.
