ICD-10 Code for Cyst on Right Wrist
The ICD-10 code for a ganglion cyst of the right wrist is M67.431.
Understanding the Code Structure
- The ICD-10 coding system uses a hierarchical structure where codes become progressively more specific through additional characters 1
- For wrist cysts (typically ganglion cysts, which are the most common type), the code falls under the musculoskeletal system category M67 (disorders of synovium and tendon) 1
- The complete code M67.431 breaks down as:
- M67 = Ganglion
- M67.4 = Ganglion of joint or tendon (ganglion cyst)
- M67.43 = Ganglion of wrist
- M67.431 = Ganglion of right wrist
Clinical Context for Accurate Coding
- Ganglion cysts are the most common soft tissue masses in the wrist, typically presenting as fluid-filled lesions that can be confirmed with ultrasound or MRI 2, 3
- The diagnosis primarily relies on history and physical examination, with imaging used to confirm the fluid-filled nature when clinically indicated 2, 4
- If the cyst type is different (such as an epidermal inclusion cyst, mucous cyst, or other specific pathology), alternative ICD-10 codes would apply 1
Common Coding Pitfalls to Avoid
- Laterality is mandatory: ICD-10 requires specification of right versus left side, unlike ICD-9 which was less granular 5
- Be specific about cyst type: If documentation indicates a different type of cyst (not a ganglion), use the appropriate alternative code 1
- Document the anatomic location precisely: "Wrist" is distinct from "hand" or "forearm" in ICD-10 coding 5
- Verify the code annually: ICD-10 codes can be updated or modified, so confirm the current code remains accurate 6