ICD-10-CM Code for Elbow Bursitis
The ICD-10-CM code for elbow bursitis is M70.3 (Other bursitis of elbow), with the 7th character indicating laterality: M70.31 for right elbow, M70.32 for left elbow, and M70.33 for bilateral involvement.
Coding Structure and Specificity
The ICD-10-CM coding system requires precise documentation of laterality for musculoskeletal conditions 1, 2. When coding elbow bursitis:
- Right elbow bursitis = M70.31
- Left elbow bursitis = M70.32
- Bilateral elbow bursitis = M70.33
- Unspecified side = M70.30 (use only when laterality is truly unknown)
The laterality digit is always in the same position regardless of the specific code structure—right is always 1, left is always 2, and bilateral is always 3 1, 2.
Specific Types of Elbow Bursitis
If the specific bursa is documented, use more precise codes:
- Olecranon bursitis (most common): M70.2- (with appropriate laterality digit)
- Bicipitoradial bursitis (less common, anterior elbow): M70.3- 3, 4, 5
The olecranon bursa is the most frequently affected bursa at the elbow, located posteriorly over the olecranon process. Bicipitoradial bursitis affects the anterior elbow and can be associated with distal biceps tendon pathology 3, 4.
Clinical Documentation Requirements
For accurate coding, clinical documentation should specify:
- Exact anatomic location (olecranon vs. bicipitoradial vs. other)
- Laterality (right, left, or bilateral)
- Etiology if known (traumatic, inflammatory, infectious, chronic overuse)
- Associated conditions (rheumatoid arthritis, gout, psoriatic arthritis) 5
Common Coding Pitfalls
Avoid defaulting to "unspecified" codes (M70.30) when laterality is documented in the medical record 6. Research shows that time pressure and incomplete documentation often lead coders to use unspecified codes inappropriately, which reduces data accuracy for surveillance and quality measures 6, 7.
Do not confuse bursitis with other elbow conditions:
- Epicondylitis (tennis/golfer's elbow) uses M77.0-M77.1 codes
- Elbow joint synovitis uses M65-M67 codes
- Tendinitis uses M76-M77 codes
The distinction matters because bursitis involves inflammation of the bursal sac, while these other conditions affect different anatomic structures 8.
Documentation for Reimbursement
When submitting claims, ensure the diagnosis code matches the clinical documentation and any imaging findings (ultrasound or MRI showing bursal fluid/inflammation) 8. Payers may deny claims when specificity is lacking, though unspecified codes are appropriate when clinical information is genuinely unavailable 9.
For chronic or refractory cases requiring surgical intervention, document failed conservative treatment (rest, NSAIDs, aspiration, steroid injection) to support medical necessity for procedures like endoscopic bursectomy 3, 4.