2025 ICD-10-CM Diagnosis Code M65.939
Unspecified synovitis and tenosynovitis, unspecified forearm
- ICD-10-CM Code:
- M65.939
- ICD-10 Code for:
- Unspecified synovitis and tenosynovitis, unspecified forearm
- Is Billable?
- Yes - Valid for Submission
- Code Navigator:
M65.939 is a billable diagnosis code used to specify a medical diagnosis of unspecified synovitis and tenosynovitis, unspecified forearm. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2024 through September 30, 2025.
Unspecified diagnosis codes like M65.939 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Approximate Synonyms
The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.
- Extensor carpi radialis tenosynovitis
New 2025 ICD-10-CM Code
M65.939 is new to ICD-10-CM code set for the FY 2025, effective October 1, 2024. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2024. This is a new and revised code for the FY 2025 (October 1, 2024 - September 30, 2025).
Replacement Code
M65939 replaces the following previously assigned ICD-10-CM code(s):
- M65.9 - Synovitis and tenosynovitis, unspecified
