What is ICD-10 code M87.142?

M87.142 is the ICD-10-CM diagnosis code for Osteonecrosis due to drugs, left hand. Death of bone tissue in the left hand caused by medication side effects, leading to bone deterioration and potential loss of function. M87.142 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. M87.142 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. M87.142 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. M87.142 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Which HCC does M87.142 map to under V28?

M87.142 does not map to a CMS-HCC V28 payment category. Check the current CMS-HCC V28 model file for payment year 2026 rather than an older V24 tip sheet.

What does M87.142 pay in RAF?

M87.142 has no separately stated V28 community RAF weight. If it is not a V28 payment HCC, it adds nothing to a community RAF score.

What is the V28 vs V24 difference for M87.142?

CMS phased in the V28 risk adjustment model over payment years 2024 (33%), 2025 (67%), and 2026 (100%), replacing V24. V28 consolidates HCC categories, removes some lower-acuity conditions, and recalibrates RAF weights across the entire model. M87.142 was a payment HCC under V24 (Bone/Joint/Muscle Infections/Necrosis) but the V28 recalibration removed it from the risk adjustment model. Both models can still appear in legacy data and in payer-specific lookback periods.

What documentation supports M87.142?

Verify the specific medication causing the osteonecrosis and document it in the medical record for accurate coding Ensure laterality is clearly documented as 'left hand' to distinguish from right hand or unspecified codes Because M87.142 maps to a payment HCC, the documentation must also satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's risk adjustment score. See the MEAT criteria checklist at /meat-criteria for what Monitor, Evaluate, Assess, or Treat looks like in a note. MEAT is generic documentation evidence, not a payer-specific rule.

2026 ICD-10-CM M87.142: Osteonecrosis due to drugs

M87.142 is not a CMS-HCC payment code. MEAT criteria · RAF calculator · HCC coding software

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Code lookupM87.142Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Other osteopathies (M86-M90)

M87.142

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Osteonecrosis due to drugs, left hand

Death of bone tissue in the left hand caused by medication side effects, leading to bone deterioration and potential loss of function.

Buddy Insight

Drug-induced osteonecrosis of the left hand indicates medication-related bone death affecting multiple hand structures, with particular consideration for dominant hand impact on functional capacity.

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Mapped

HCC 39

Bone/Joint/Muscle Infections/...

RAF 0.401

ACA/HHS

Mapped

HCC 55

HHS-HCC 55

Varies by metal level

ESRD/PACE

Mapped

HCC 39

Bone/Joint/Muscle Infections/...

RAF 0.092

RXHCC

Mapped

HCC 80

Bone/Joint/Muscle Infections/...

RAF 0.204

Code Book Path

Official

M87.1Osteonecrosis due to drugs

M87.14Osteonecrosis due to drugs, hand and fingers

M87.142Osteonecrosis due to drugs, left hand

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for M87.142 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for M87.142 in this effective period.

Related Child Codes

Official

M87.141Osteonecrosis due to drugs, right hand

M87.143Osteonecrosis due to drugs, unspecified hand

M87.144Osteonecrosis due to drugs, right finger(s)

M87.145Osteonecrosis due to drugs, left finger(s)

M87.146Osteonecrosis due to drugs, unspecified finger(s)

Includes

Official

ICD-10-CM does not list Includes notes for M87.142 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for M87.142 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for M87.142 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for M87.142 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for M87.142 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Explicit documentation of left hand osteonecrosis involvement

Causative drug identification with dosage and duration when available

Imaging studies demonstrating extent of hand bone necrosis

Functional assessment including grip strength, pinch, and dexterity

MEAT Support

HCC Buddy guidance

Explicit documentation of left hand osteonecrosis involvement

Causative drug identification with dosage and duration when available

Imaging studies demonstrating extent of hand bone necrosis

Functional assessment including grip strength, pinch, and dexterity

Audit Caution

HCC Buddy guidance

Reversing left/right orientation during documentation review

Using more specific codes when broader hand involvement is present

Missing drug causation documentation in complex hand conditions

Using unspecified codes when laterality is clearly available

Common Mistakes

HCC Buddy guidance

M87.141 — Right hand osteonecrosis, opposite laterality

M87.138 — Left carpus osteonecrosis limited to wrist bones

M87.143 — Unspecified hand when left side is documented

M87.145 — Left finger osteonecrosis more specific than hand involvement

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is M87.142 an HCC code?

Yes. M87.142 maps to Bone/Joint/Muscle Infections/Necrosis under the V24 model but is not retained in V28.

Code: M87.142
Description: Osteonecrosis due to drugs, left hand
HCC (V28): No CMS-HCC V28 mapping
RAF: —
Billable: Yes
Payment year: 2026

HCC Category Mapping

V24HCC 39, Bone/Joint/Muscle Infections/Necrosis

0.401

ESRDHCC 39, Bone/Joint/Muscle Infections/Necrosis

0.092

RxHCCHCC 80, Bone/Joint/Muscle Infections/Necrosis

0.204

Each model's RAF is its CMS base weight for that model's standard population, so weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. 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.

Work M87.142 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for M87.142

For M87.142 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 M87.142 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

M87.142 is the ICD-10-CM diagnosis code for osteonecrosis due to drugs, left hand. Death of bone tissue in the left hand caused by medication side effects, leading to bone deterioration and potential loss of function. M87.142 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 older CMS-HCC V24 model, M87.142 maps to Bone/Joint/Muscle Infections/Necrosis (HCC 39) with a community, non-dual, aged base RAF weight of 0.401. 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.

Verify the specific medication causing the osteonecrosis and document it in the medical record for accurate coding. Because M87.142 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 M87.142 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Verify the specific medication causing the osteonecrosis and document it in the medical record for accurate coding
•Ensure laterality is clearly documented as 'left hand' to distinguish from right hand or unspecified codes

Clinical Significance

Drug-induced osteonecrosis of the left hand indicates medication-related bone death affecting multiple hand structures, with particular consideration for dominant hand impact on functional capacity. This condition requires specialized hand surgery consultation and comprehensive rehabilitation planning for optimal functional outcomes.