Bursitis of the left elbow involving a bursa other than the olecranon bursa, classified under soft tissue disorders related to use, overuse, and pressure.
Verified May 8, 2026 · 4 sources ↓
- Status
- Billable
- Chapter
- 13
- Related CPT
- 5
- Region
- Elbow
Documentation tips
What should appear in the chart to support M70.32.
Source · Editorial brief grounded in 4 cited references ↓
- Explicitly document 'left elbow' — laterality is required; 'elbow bursitis' alone forces the unspecified code M70.30.
- Specify which bursa is involved (e.g., cubital, radioulnar) and confirm it is not the olecranon bursa; olecranon bursitis maps to M70.22, not M70.32.
- Document the mechanism: repetitive motion, sustained pressure, or occupational activity — this satisfies the M70 category's use/overuse/pressure classification and supports the Y93.– external cause code.
- Record prior conservative treatment (NSAIDs, activity modification, physical therapy) to establish medical necessity before aspiration or injection.
- Note imaging findings (ultrasound or MRI confirming bursal fluid/thickening) if obtained; supports medical necessity for injection billing under M70.32.
Related CPT procedures
Procedure codes commonly billed with M70.32. Linking the right diagnosis to the right procedure is what establishes medical necessity.
Source · CMS LCDs · AAOS specialty guidance · claims-pattern analysis
Common coding pitfalls
The recurring mistakes coders make with M70.32 and adjacent codes.
Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓
- Billing the non-billable parent M70.3 instead of the laterality-specific child code M70.32 — payers will reject or downcode the claim.
- Using M70.32 for olecranon bursitis of the left elbow — olecranon bursitis has its own code, M70.22; M70.32 is reserved for other elbow bursae.
- Failing to add a Y93.– external cause code when the disorder is occupationally or activity-driven — the M70 category carries a Use Additional instruction for this.
- Coding M70.32 when the bursitis is infective — septic/infective bursitis belongs in the M71 category (M71.122 for left elbow), not M70.32.
Clinical context
Source · Editorial summary grounded in 4 cited references ↓
M70.32 applies to non-olecranon bursitis of the left elbow — for example, inflammation of the cubital or radioulnar bursae — arising from repetitive use, sustained pressure, or occupational overuse. It sits within the M70.3 family; you must use M70.32 (left), M70.31 (right), or M70.30 (unspecified) rather than the non-billable parent M70.3. If the provider documents olecranon bursitis specifically, use M70.22 instead.
M70.32 is explicitly excluded from covering bursitis of the shoulder (M75.5), enthesopathies (M76–M77), and infective bursitis (M71.122 for left elbow). If the bursitis is septic or the provider suspects infection, switch to the M71 category and add a causative organism code from B95–B97. Bursitis NOS without site specificity falls to M71.9.
CMS includes M70.32 among the ICD-10-CM codes that support medical necessity for bursa injection procedures. When billing an injection, also report the activity external cause code (Y93.–) if the disorder is occupationally or activity-related, per the M70 category Use Additional instruction.
Sibling codes
Other billable codes under M70.3 (laterality / anatomic variants).
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 4 cited references ↓
01What is the difference between M70.32 and M70.22?
02Can I use M70.32 for infective or septic bursitis of the left elbow?
03Does M70.32 support medical necessity for a bursa injection at the left elbow?
04Do I need to add an external cause code with M70.32?
05What if laterality is not documented — can I still bill M70.32?
06Is bursitis NOS of the left elbow coded to M70.32?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
Mira AI Scribe
The Mira AI Scribe captures laterality (left elbow), the specific bursa affected, the activity or occupational exposure driving the condition, prior conservative care attempts, and any imaging confirming bursal inflammation. This prevents downcoding to the unspecified M70.30, mismapping to olecranon bursitis (M70.22), or missing the required external cause code — all of which trigger payer edits or audit flags.
See how Mira captures M70.32 documentation