M02.88
BillableOther reactive arthropathies, vertebrae
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M02.88 an HCC code?
Yes. M02.88 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 M02.88
For M02.88to 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 M02.88 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
M02.88 is the ICD-10-CM diagnosis code for other reactive arthropathies, vertebrae. Joint inflammation of the spine and vertebrae that develops as a reaction to an infection or other trigger elsewhere in the body. M02.88 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, M02.88 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, M02.88 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.
This code applies to reactive arthropathy affecting the vertebral column; distinguish from ankylosing spondylitis and other primary spinal conditions. Because M02.88 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 M02.88 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code applies to reactive arthropathy affecting the vertebral column; distinguish from ankylosing spondylitis and other primary spinal conditions
- •Document the location within the spine (cervical, thoracic, lumbar) if available, though this code does not require that specificity
Clinical Significance
This diagnosis represents reactive arthropathy affecting the vertebrae and spine, indicating spinal joint inflammation secondary to a remote infectious process. Spinal involvement is particularly concerning as it can affect neurological function, mobility, and overall structural integrity, requiring specialized management and monitoring.
Documentation Requirements
- ✓Clinical evidence of vertebral/spinal joint inflammation (back pain, stiffness, reduced mobility)
- ✓Documentation of reactive nature - inflammation secondary to remote infection
- ✓Specific identification of vertebral/spinal involvement
- ✓Evidence ruling out direct spinal infection or osteomyelitis
- ✓Documentation of triggering infection or infectious process (if identified)
- ✓Physical examination findings consistent with spinal arthritis
- ✓Exclusion of other spinal conditions (ankylosing spondylitis, degenerative disc disease)
- ✓Assessment of neurological symptoms and functional limitations
Commonly Confused Codes
- •M46.20 — Osteomyelitis of vertebra, unspecified region (infectious vs reactive)
- •M45.9 — Ankylosing spondylitis, unspecified (autoimmune vs reactive)
- •M54.9 — Dorsalgia, unspecified (symptom vs specific arthropathy diagnosis)
- •M02.89 — Other reactive arthropathies, multiple sites (if multiple joints affected)
- •M48.8 — Other specified spondylopathies (structural vs inflammatory condition)