M87.341
BillableOther secondary osteonecrosis, right hand
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M87.341 an HCC code?
Yes. M87.341 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 M87.341
For M87.341 to 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 M87.341 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
M87.341 is the ICD-10-CM diagnosis code for other secondary osteonecrosis, right hand. Death of bone tissue in the right hand caused by an underlying condition or injury, affecting the hand structure and function. M87.341 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering other osteopathies (m86-m90).
Under the CMS-HCC V28 risk adjustment model, M87.341 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, M87.341 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 the hand as a whole; if a specific bone (metacarpal or carpal) is documented, consider more specific codes. Because M87.341 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 M87.341 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code applies to the hand as a whole; if a specific bone (metacarpal or carpal) is documented, consider more specific codes
- •Verify right side documentation to ensure proper laterality coding
Clinical Significance
Secondary osteonecrosis of the right hand indicates bone death from identifiable non-traumatic causes affecting the bones of the hand. This condition can severely impact grip strength, fine motor skills, and activities of daily living, often requiring specialized hand surgery intervention.
Documentation Requirements
- ✓Documentation of underlying secondary cause of osteonecrosis
- ✓Imaging confirmation of osteonecrosis in right hand bones
- ✓Clinical examination showing right hand dysfunction
- ✓History of risk factors such as steroids, chemotherapy, or systemic disease
- ✓Exclusion of traumatic and idiopathic etiologies
- ✓Documentation of pain, swelling, or functional limitations
- ✓Provider statement identifying secondary nature of condition
- ✓Evidence of bone death through appropriate diagnostic studies
Commonly Confused Codes
- •M87.041 — Idiopathic osteonecrosis of right hand (no secondary cause)
- •M87.241 — Osteonecrosis due to previous trauma of right hand (traumatic)
- •S62.90XA — Unspecified fracture of unspecified part of right wrist and hand (acute)
- •M86.041 — Acute hematogenous osteomyelitis of right hand (infection)
- •M25.541 — Pain in joints of right hand (symptom without pathology)