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M05.032 ICD-10-CM Code: Felty's syndrome, left wrist

M05.032 maps to CMS-HCC V28 93. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupM05.032

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

M05.032

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

Felty's syndrome, left wrist

Felty's syndrome affecting the left wrist, characterized by rheumatoid arthritis, enlarged spleen, and low white blood cell count.

Buddy the Bee presenting code insight

Buddy Insight

Felty's syndrome involving the left wrist represents a severe rheumatoid condition that creates significant functional impairment combined with dangerous immunosuppression.

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

HCC 93

Coefficient HCC 93: 0.617 (Community Non-Dual Aged (CNA))

CMS-HCC V24

Historical

Historical

Not used for CY2026 payment

ACA/HHS

HCC 056

Code-level coefficient reference

ESRD/PACE

HCC 40

Code-level coefficient reference

RXHCC

HCC 83

Code-level coefficient reference

Code Book Path

Official
M05.0Felty's syndromeM05.03Felty's syndrome, wristM05.032Felty's syndrome, left wrist

Inclusion Terms

Official
  • Rheumatoid arthritis with splenoadenomegaly and leukopeniaInherited from M05.0, M05.03
  • Felty's syndrome, carpal bonesInherited from M05.0, M05.03

Excludes 2

Official
  • arthropathic psoriasis (L40.5-)Inherited from M00-M99
  • certain conditions originating in the perinatal period (P04-P96)Inherited from M00-M99
  • certain infectious and parasitic diseases (A00-B99)Inherited from M00-M99
  • compartment syndrome (traumatic) (T79.A-)Inherited from M00-M99
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from M00-M99
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from M00-M99
  • endocrine, nutritional and metabolic diseases (E00-E88)Inherited from M00-M99
  • injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from M00-M99
  • neoplasms (C00-D49)Inherited from M00-M99
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from M00-M99

Related Codes

Official
M05.031Felty's syndrome, right wristM05.039Felty's syndrome, unspecified wrist

Includes

Official

No Includes notes are included in this display for M05.032. Check the code and parent instructions in the Code Book.

Excludes 1

Official
  • rheumatic fever (I00)Inherited from M05
  • juvenile rheumatoid arthritis (M08.-)Inherited from M05
  • rheumatoid arthritis of spine (M45.-)Inherited from M05

Code First

Official

No Code First sequencing instructions are included in this display for M05.032. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for M05.032. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for M05.032. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance
Clear documentation of rheumatoid arthritis specifically affecting the left wrist
Evidence of splenomegaly through physical examination or imaging
Laboratory confirmation of neutropenia with specific white blood cell counts
Left wrist laterality explicitly documented

MEAT Support

HCC Buddy guidance
Clear documentation of rheumatoid arthritis specifically affecting the left wrist
Evidence of splenomegaly through physical examination or imaging
Laboratory confirmation of neutropenia with specific white blood cell counts
Left wrist laterality explicitly documented

Audit Caution

HCC Buddy guidance
Confusing laterality and using right wrist code instead of left
Coding standard rheumatoid arthritis when Felty's components are documented
Missing the systemic nature of the syndrome
Failing to verify laboratory confirmation of neutropenia

Common Mistakes

HCC Buddy guidance
M05.031 — Same condition but affecting right wrist instead of left
M05.9 — Seropositive rheumatoid arthritis without the complete Felty's triad
M06.9 — Rheumatoid arthritis unspecified without hematologic findings
D70.4 — Cyclic neutropenia without rheumatoid arthritis component

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 M05.032 an HCC code?

Yes. M05.032 (Felty's syndrome, 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: M05.032 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
M05.032
Description
Felty's syndrome, 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 M05.032 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for M05.032

For M05.032, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

  • 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

Coder workflow notes

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What This Code Means

M05.032 is the ICD-10-CM diagnosis code for felty's syndrome, left wrist. Felty's syndrome affecting the left wrist, characterized by rheumatoid arthritis, enlarged spleen, and low white blood cell count. M05.032 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, M05.032 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. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. 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.

Ensure documentation clearly specifies left wrist as the affected site. For M05.032, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. 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 M05.032 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • •Ensure documentation clearly specifies left wrist as the affected site
  • •Verify this is not bilateral or right wrist involvement before assigning this code

Clinical Significance

Felty's syndrome involving the left wrist represents a severe rheumatoid condition that creates significant functional impairment combined with dangerous immunosuppression. This diagnosis requires urgent multidisciplinary intervention due to the combination of joint destruction, neutropenia-induced infection risk, and systemic inflammatory complications.

Documentation Requirements

  • ✓Clear documentation of rheumatoid arthritis specifically affecting the left wrist
  • ✓Evidence of splenomegaly through physical examination or imaging
  • ✓Laboratory confirmation of neutropenia with specific white blood cell counts
  • ✓Left wrist laterality explicitly documented
  • ✓Assessment of wrist joint function and range of motion
  • ✓History of infections or immune dysfunction
  • ✓Current immunosuppressive therapy and monitoring schedule
  • ✓Coordinated care plan addressing rheumatologic and hematologic aspects

Commonly Confused Codes

  • •M05.031: Same condition but affecting right wrist instead of left
  • •M05.9: Seropositive rheumatoid arthritis without the complete Felty's triad
  • •M06.9: Rheumatoid arthritis unspecified without hematologic findings
  • •D70.4: Cyclic neutropenia without rheumatoid arthritis component
  • •M25.532: Pain in left wrist without inflammatory or systemic components

Child Codes

M05.031Felty's syndrome, right wrist
HCC 93
M05.032Felty's syndrome, left wrist
HCC 93
M05.039Felty's syndrome, unspecified wrist
HCC 93

Code Hierarchy

└M05Rheumatoid arthritis with rheumatoid factor└M05.0Felty's syndrome└M05.03Felty's syndrome, wrist└M05.032Felty's syndrome, left wrist
└M05.032Felty's syndrome, left wrist

Also searched as

  • M05 032
  • M05032

For M05.032, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

M05.032 maps to CMS-HCC V28 category 93, Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders. See the ICD-10 to HCC mapping hub for how the V28 crosswalk works. The mapping identifies a payment HCC category for M05.032. Review its source-labeled HCC coefficient above, check the RAF Calculator with complete member context for CMS-HCC V28 PY2026, and confirm the documentation the chart needs before the code is submitted. HCC Buddy shows no RAF score unless every required source and calculation check passes.

More on M05.032

Code family

Every M05 code with its CMS-HCC V28 statusRheumatoid arthritis with rheumatoid factor, 211 billable codes

Related condition guides

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