Bursitis localized to the right hand, classified under soft tissue disorders related to use, overuse, and pressure (M70 category).

Documentation tips

What should appear in the chart to support M70.11.

Source · Editorial brief grounded in 5 cited references ↓

• Explicitly document 'right hand' laterality — without it, you can only assign M70.10 (unspecified laterality).
• Record the specific bursal structure involved when known (e.g., finger, wrist-side of hand) to support medical necessity.
• Document occupational or activity-related etiology (e.g., repetitive gripping, keyboarding, manual labor) to justify the M70 category over M71.9- (bursitis NOS).
• Include relevant imaging findings — ultrasound or MRI confirming bursal fluid accumulation or thickening strengthens the diagnosis and reduces audit risk.
• Add the appropriate Y93.- external cause activity code when the disorder is linked to a specific occupation or recreational activity.
• Note any prior conservative treatment (NSAIDs, splinting, physical therapy) in the record if the visit involves a procedural intervention such as aspiration or injection.

Related CPT procedures

Procedure codes commonly billed with M70.11. 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 M70.11 and adjacent codes.

Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓

• Using M70.11 when documentation only says 'bursitis, hand' without specifying right — assign M70.10 (unspecified) until the note confirms laterality.
• Coding M70.11 for bursitis of the shoulder or wrist proper when the documented site is ambiguous — M75.5 covers shoulder bursitis, and wrist bursitis may fall under M70.12 or adjacent codes depending on exact location.
• Omitting the Y93.- external cause activity code when the M70 category's 'use additional code' instruction applies — this is a documentation and compliance gap.
• Selecting M70.11 for septic or infectious bursitis of the right hand — infectious bursitis codes to M71.0- (abscess of bursa) or M71.1- (other infective bursitis), not M70.-.
• Confusing bursitis with tenosynovitis of the hand — tenosynovitis codes to M65.- and is a separate clinical entity requiring its own code selection.

Clinical context

Source · Editorial summary grounded in 5 cited references ↓

Sibling codes

Other billable codes under M70.1 (laterality / anatomic variants).