Billable / Specific Code
ICD-10-CM M65.921 is the diagnosis code for Unspecified synovitis and tenosynovitis, right upper arm. This code falls under the section "Disorders of synovium and tendon" 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 M65.921 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M65.921 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M65.921 is the ICD-10-CM diagnosis code for "Unspecified synovitis and tenosynovitis, 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 M65.921 is M65.92 ("Unspecified synovitis and tenosynovitis, upper arm"). M65.921 provides a more specific classification within this category.
M65.921 is located in Section M65-M67 — "Disorders of synovium and tendon" within Chapter 13 of the ICD-10-CM Tabular List.
Use M65.921 when the patients documented diagnosis matches "Unspecified synovitis and tenosynovitis, 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 Unspecified synovitis and tenosynovitis, right upper arm is M65.921.
Yes, M65.921 can be used as a primary diagnosis code since it is billable and specific.
M65.921 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M65.921 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.