M02.10 ICD-10-CM Code: Postdysenteric arthropathy, unspecified site
HCC Buddy Code Card
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FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Infectious arthropathies (M00-M02)
M02.10
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePostdysenteric arthropathy, unspecified site
Joint inflammation and pain that develops after a dysentery infection, affecting an unspecified location in the body.
Buddy Insight
Postdysenteric arthropathy at an unspecified site represents reactive joint inflammation following dysentery infection, indicating incomplete anatomical documentation.
CMS-HCC V28
MappedHCC 92
RAF 0.209
CMS-HCC V24
MappedHCC 39
RAF 0.482
ACA/HHS
00
RAF 0
ESRD/PACE
MappedHCC 39
RAF 0.0
RXHCC
00
RAF 0
Code Trumping
Basket needed
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for M02.10 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for M02.10 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for M02.10 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for M02.10 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for M02.10 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for M02.10 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for M02.10 in this effective period.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is M02.10 an HCC code?
Yes. M02.10 maps to Bone/Joint/Muscle Infections/Necrosis under the CMS-HCC V28 risk adjustment model (and Bone/Joint/Muscle Infections/Necrosis under V24).
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for M02.10
For M02.10to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed M02.10 during that encounter, not just copy-forwarded from a problem list.
What This Code Means
M02.10 is the ICD-10-CM diagnosis code for postdysenteric arthropathy, unspecified site. Joint inflammation and pain that develops after a dysentery infection, affecting an unspecified location in the body. M02.10 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering infectious arthropathies (m00-m02).
Under the CMS-HCC V28 risk adjustment model, M02.10 maps to Bone/Joint/Muscle Infections/Necrosis (HCC 92) with a community, non-dual, aged base RAF weight of 0.209. Under the older V24 model, M02.10 mapped to the same category but with a base RAF weight of 0.482, V28 recalibrated weights across the entire model. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
Use this code only when the specific joint site is not documented; if site is known, use a more specific code (M02.11-M02.19). Because M02.10 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M02.10 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
Clinical Significance
Postdysenteric arthropathy at an unspecified site represents reactive joint inflammation following dysentery infection, indicating incomplete anatomical documentation. This condition reflects immune-mediated joint involvement that can persist long after the initial intestinal infection has resolved, requiring ongoing management.
Documentation Requirements
- ✓History of preceding dysentery infection with appropriate documentation
- ✓Evidence of joint involvement following dysenteric illness
- ✓Temporal relationship between dysentery episode and joint symptoms
- ✓Clinical findings of arthropathy without specification of joint location
- ✓Laboratory studies ruling out active infection in joints
- ✓Documentation that joint symptoms are reactive rather than directly infectious
- ✓Treatment response to anti-inflammatory rather than antimicrobial therapy
- ✓Follow-up demonstrating persistence or resolution of joint symptoms
Commonly Confused Codes
- •M02.9: Reactive arthropathy, unspecified (reactive arthritis without specific trigger)
- •K59.1: Diarrhea, unspecified (active dysenteric illness without joint involvement)
- •M01.X0: Direct infection of unspecified joint (direct rather than reactive infection)
- •M25.50: Pain in unspecified joint (joint pain without reactive component)