What is ICD-10 code M08.232?

M08.232 is the ICD-10-CM diagnosis code for Juvenile rheumatoid arthritis with systemic onset, left wrist. A type of childhood arthritis that affects the left wrist and causes inflammation throughout the body, including fever and rash. M08.232 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. M08.232 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. M08.232 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. M08.232 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 M08.232 map to under V28?

M08.232 maps to CMS-HCC V28 HCC 93 (Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders). The category numbers, labels, and conditions come from the CMS-HCC V28 model file for payment year 2026.

2026 ICD-10-CM M08.232: Juvenile rheumatoid

M08.232 maps to CMS-HCC V28 93. A source-labeled RAF reference is available. Documentation must support MEAT. MEAT criteria · RAF Calculator · HCC Buddy coding tools

ICD-10-CM Code View

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Code lookupM08.232Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Inflammatory polyarthropathies (M05-M14)

M08.232

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

Juvenile rheumatoid arthritis with systemic onset, left wrist

A type of childhood arthritis that affects the left wrist and causes inflammation throughout the body, including fever and rash.

Buddy Insight

CMS-HCC V28

Mapped

HCC 93

Rheumatoid Arthritis and Othe...

Code-level coefficient reference

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

Mapped

HCC 056

HHS-HCC 056 adult, RAF varies...

Code-level coefficient reference

ESRD/PACE

Mapped

HCC 40

Rheumatoid Arthritis and Infl...

Code-level coefficient reference

RXHCC

Mapped

HCC 83

Rheumatoid Arthritis and Othe...

Code-level coefficient reference

Code Book Path

Official

M08.2Juvenile rheumatoid arthritis with systemic onset

M08.23Juvenile rheumatoid arthritis with systemic onset, wrist

M08.232Juvenile rheumatoid arthritis with systemic onset, left wrist

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for M08.232 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for M08.232 in this effective period.

Related Child Codes

Official

M08.231Juvenile rheumatoid arthritis with systemic onset, right wrist

M08.239Juvenile rheumatoid arthritis with systemic onset, unspecified wrist

Includes

Official

ICD-10-CM does not list Includes notes for M08.232 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for M08.232 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for M08.232 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for M08.232 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for M08.232 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Physician diagnosis of systemic onset juvenile rheumatoid arthritis

Specific documentation of left wrist joint involvement

Age of onset documented as under 16 years

Evidence of systemic manifestations (fever, rash, hepatosplenomegaly)

MEAT Support

HCC Buddy guidance

Physician diagnosis of systemic onset juvenile rheumatoid arthritis

Specific documentation of left wrist joint involvement

Age of onset documented as under 16 years

Evidence of systemic manifestations (fever, rash, hepatosplenomegaly)

Audit Caution

HCC Buddy guidance

Using unspecified laterality when left side is documented

Coding other JRA subtypes when systemic features present

Applying adult RA codes to pediatric patients

Missing associated hand joint involvement

Common Mistakes

HCC Buddy guidance

M08231 — Right wrist involvement instead of left

M08239 — Unspecified wrist when left side documented

M08032 — Unspecified JRA left wrist without systemic features

M06.832 — Adult RA left wrist for patients over 16

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 M08.232 an HCC code?

Yes. M08.232 (Juvenile rheumatoid arthritis with systemic onset, left wrist) maps to HCC 93, Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.617. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: M08.232 is billable and maps to V28 HCC 93, Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: M08.232
Description: Juvenile rheumatoid arthritis with systemic onset, left wrist
HCC (V28): HCC 93 — Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders
RAF reference coefficient: 0.617
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 93, Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders

0.617

ESRDHCC 40, Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

Not separately weighted

RxHCCHCC 83, Rheumatoid Arthritis and Other Inflammatory Polyarthropathy

Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. 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 context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work M08.232 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT Criteria for M08.232

For M08.232 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 M08.232 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

M08.232 is the ICD-10-CM diagnosis code for juvenile rheumatoid arthritis with systemic onset, left wrist. A type of childhood arthritis that affects the left wrist and causes inflammation throughout the body, including fever and rash. M08.232 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering inflammatory polyarthropathies (m05-m14).

Under the CMS-HCC V28 risk adjustment model, M08.232 maps to Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders (HCC 93) with a source-labeled community, non-dual, aged reference coefficient of 0.617. No V24 mapping is shown for M08.232; use the applicable model and payment year when reviewing the V28 mapping. 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. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

Confirm left wrist involvement is documented in the clinical notes. Because M08.232 maps to an HCC category, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) before the diagnosis is used for risk adjustment. 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, source-labeled coefficient references, and MEAT documentation criteria for M08.232 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Confirm left wrist involvement is documented in the clinical notes
•Document any systemic manifestations such as fever, rash, or hepatosplenomegaly for complete clinical picture

Clinical Significance

This diagnosis represents systemic onset juvenile rheumatoid arthritis with left wrist involvement, combining severe systemic inflammatory disease with focal joint destruction that impacts hand function. The systemic component significantly increases morbidity risk and requires aggressive treatment to prevent complications.