Reactive joint inflammation affecting multiple anatomical sites, occurring as a sequela of dysenteric gastrointestinal infection — classified under postinfective and reactive arthropathies.
Verified May 8, 2026 · 4 sources ↓
- Status
- Billable
- Chapter
- 13
- Related CPT
- 10
- Region
- Multi-region
Documentation tips
What should appear in the chart to support M02.19.
Source · Editorial brief grounded in 4 cited references ↓
- Name every affected joint explicitly — knee, ankle, wrist, etc. — so the multi-site selection is defensible on audit rather than defaulting to unspecified.
- Document the triggering enteric infection by pathogen when known (e.g., Yersinia enterocolitica, Shigella species) to support the required 'code first underlying disease' sequencing instruction.
- Record the timeline: onset of GI illness, resolution or persistence of infection, and emergence of joint symptoms — this distinguishes reactive arthropathy from primary inflammatory arthritis.
- Note the sterile nature of joint involvement (negative cultures or clinical reasoning) to differentiate from septic arthritis, which would fall under M00.x codes.
- If prior conservative management has been trialed (NSAIDs, physical therapy), document that history to support medical necessity for advanced imaging or specialist referral.
Related CPT procedures
Procedure codes commonly billed with M02.19. 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 M02.19 and adjacent codes.
Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓
- Failing to sequence the underlying enteric infection code first — M02.19 is a manifestation code with a 'code first' instruction; leading with M02.19 alone will trigger a sequencing flag.
- Using M02.19 when only one joint is involved — if the record documents a single site, drop to the appropriate site-specific M02.1x code (e.g., M02.161 for right knee).
- Confusing postdysenteric arthropathy with other reactive arthropathies in M02 — postimmunization (M02.2x) and arthropathy following intestinal bypass (M02.0x) are separate subcategories with distinct etiologies.
- Defaulting to M02.10 (unspecified site) when multi-site involvement is clearly documented — use M02.19 for multiple sites, not the unspecified-site code.
- Omitting ICD-10 codes for active or recent enteric infection when still clinically relevant, leaving payers without a complete picture of the episode of care.
Clinical context
Source · Editorial summary grounded in 4 cited references ↓
M02.19 applies when a patient develops arthropathy at multiple joint sites following a dysenteric illness (e.g., Shigella, Salmonella, Campylobacter, or Yersinia enterocolitica infection). The joint involvement is sterile — no organism is present in the joint — but the immune response to the enteric infection drives synovial inflammation. Use M02.19 only when two or more distinct joint regions are documented as affected; if involvement is limited to a single named joint, select the site-specific code within M02.1x instead.
ICD-10-CM sequencing rules require you to code first the underlying disease. Common underlying codes include A04.6 (enteritis due to Yersinia enterocolitica), the appropriate Shigella code from A03.x, or other enteric infection codes. M02.19 is listed as an additional diagnosis, not the principal diagnosis, when the triggering infection is still active or documented. If the infectious episode is resolved and only the joint sequela remains, clinical judgment guides sequencing — document the reasoning.
M02.19 sits within the M02.1 subcategory (Postdysenteric arthropathy). The full M02.1 family offers laterality-specific codes for shoulder, elbow, wrist, hand, hip, knee, ankle/foot, and vertebrae. Use M02.19 only when the clinical record explicitly documents polyarticular or multi-site involvement that cannot be adequately captured by a single site-specific code. Unspecified-site claims at M02.10 should be avoided if the record names the joints involved.
Sibling codes
Other billable codes under M02.1 (laterality / anatomic variants).
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 4 cited references ↓
01Can I use M02.19 as the principal diagnosis?
02What distinguishes M02.19 from M02.10?
03Which enteric pathogens are typically associated with postdysenteric arthropathy?
04How does M02.19 differ from reactive arthritis (M02.3x)?
05Should I code each individual joint separately in addition to M02.19?
06Does M02.19 require a 7th character extension?
07What imaging or lab findings should be documented to support M02.19?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
Mira AI Scribe
Mira captures the documented joint sites (e.g., bilateral knees, right ankle, left wrist), the precipitating enteric illness with pathogen if identified, symptom onset relative to GI infection, and any workup ruling out septic or primary inflammatory arthritis. This prevents sequencing errors, supports the multi-site code selection over unspecified, and ensures the required underlying infection code is queued for correct claim ordering.
See how Mira captures M02.19 documentation