Billable / Specific Code
ICD-10-CM M60.121 is the diagnosis code for Interstitial myositis, right upper arm. This code falls under the section "Disorders of muscles" within Chapter 13 — Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where M60.121 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M60.121 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M60.121 is the ICD-10-CM diagnosis code for "Interstitial myositis, right upper arm". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M60.121 is M60.12 ("Interstitial myositis, upper arm"). M60.121 provides a more specific classification within this category.
M60.121 is located in Section M60-M63 — "Disorders of muscles" within Chapter 13 of the ICD-10-CM Tabular List.
Use M60.121 when the patients documented diagnosis matches "Interstitial myositis, right upper arm" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Interstitial myositis, right upper arm is M60.121.
Yes, M60.121 can be used as a primary diagnosis code since it is billable and specific.
M60.121 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M60.121 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.