Infective bursitis affecting two or more distinct bursal sites simultaneously, where no single-site code captures the full clinical picture.

Documentation tips

What should appear in the chart to support M71.19.

Source · Editorial brief grounded in 4 cited references ↓

• Name every bursal site affected (e.g., right olecranon bursa AND left prepatellar bursa) — 'multiple sites' is a fallback when individual sites cannot be discretely coded, not a substitute for thorough documentation.
• Record the identified or suspected causative organism and the diagnostic method (culture, Gram stain, serology) so the required B95.- or B96.- secondary code can be assigned accurately.
• Document whether each site was aspirated or drained and whether cultures were sent; procedure notes drive CPT selection and support medical necessity for the infection diagnosis.
• Capture immune status, diabetes, skin breakdown, or recent trauma at each site — these comorbidities affect medical necessity reviews and may require additional secondary codes.
• If treatment targets individual sites on separate dates, document site-specific findings at each visit to support potential reclassification to single-site codes on follow-up claims.

Related CPT procedures

Procedure codes commonly billed with M71.19. 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 M71.19 and adjacent codes.

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

• Assigning M71.19 when the record identifies only one infected bursa — if a single site is documented, use the specific single-site code (M71.11–M71.18) instead.
• Skipping the mandatory secondary organism code (B95.- or B96.-); payers and auditors can flag claims where an infective code lacks an identified pathogen when one is documented.
• Confusing M71.19 with M70.- (bursitis due to use, overuse, or pressure) — M70.- is an Excludes1 condition; the two categories are mutually exclusive for the same site.
• Using M71.19 as a default 'catch-all' for any multi-site bursitis rather than verifying that the condition is truly infectious in origin; non-infective multi-site bursopathy belongs elsewhere in M71.
• Failing to update the code when follow-up documentation narrows the diagnosis to a single site — a subsequent encounter with site-specific findings should be recoded to the appropriate lateralized single-site code.

Clinical context

Source · Editorial summary grounded in 4 cited references ↓

Sibling codes

Other billable codes under M71.1 (laterality / anatomic variants).