M87.212 ICD-10-CM Code: Osteonecrosis due to previous trauma, left shoulder
HCC Buddy Code Card
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FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Other osteopathies (M86-M90)
M87.212
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOsteonecrosis due to previous trauma, left shoulder
Bone death in the left shoulder resulting from a previous injury or trauma.
Buddy Insight
Trauma-related osteonecrosis of the left shoulder indicates bone death resulting from previous injury, requiring specialized orthopedic management to preserve function and prevent progression.
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
MappedHCC 80
RAF 0.0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for M87.212 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for M87.212 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for M87.212 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for M87.212 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for M87.212 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for M87.212 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for M87.212 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 M87.212 an HCC code?
Yes. M87.212 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 M87.212
For M87.212to 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 M87.212 during that encounter, not just copy-forwarded from a problem list.
What This Code Means
M87.212 is the ICD-10-CM diagnosis code for osteonecrosis due to previous trauma, left shoulder. Bone death in the left shoulder resulting from a previous injury or trauma. M87.212 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, M87.212 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, M87.212 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.
Ensure laterality is clearly documented as left in the medical record. Because M87.212 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 M87.212 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Ensure laterality is clearly documented as left in the medical record
- •Link this code with documentation of the original shoulder injury that precipitated the osteonecrosis
Clinical Significance
Trauma-related osteonecrosis of the left shoulder indicates bone death resulting from previous injury, requiring specialized orthopedic management to preserve function and prevent progression. This condition can severely compromise shoulder mobility and daily activities, often necessitating comprehensive rehabilitation or surgical intervention.
Documentation Requirements
- ✓Specific documentation of left shoulder involvement
- ✓Clear history of previous trauma or injury
- ✓Imaging evidence of left shoulder osteonecrosis
- ✓Timeline establishing relationship between trauma and bone death
- ✓Functional assessment of left shoulder mobility and strength
- ✓Documentation of original injury mechanism
- ✓Treatment planning and response monitoring
- ✓Evaluation for surgical options if conservative treatment fails
Commonly Confused Codes
- •M87.012 — Idiopathic osteonecrosis of left shoulder (no trauma cause)
- •M87.112 — Drug-induced osteonecrosis of left shoulder (medication-related)
- •M87.312 — Other secondary osteonecrosis of left shoulder (different secondary cause)
- •M87.211 — Trauma-related osteonecrosis of right shoulder (wrong laterality)
- •M75.31 — Calcific tendinitis of left shoulder (different pathology)