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v1.0.0
ICD-10 Guide
ICD-10 CodesM05.04

M05.04

Billable

Felty's syndrome, hand

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/12/2025

Code Description

ICD-10 M05.04 is a billable code used to indicate a diagnosis of felty's syndrome, hand.

Key Diagnostic Point:

Felty's syndrome is a rare complication of rheumatoid arthritis characterized by the triad of rheumatoid arthritis, splenomegaly, and neutropenia. In the context of the hand, patients may experience significant joint involvement, particularly in the metacarpophalangeal and proximal interphalangeal joints. The pathophysiology involves autoimmune processes leading to inflammation and destruction of synovial tissue, resulting in joint deformities and functional limitations. Clinically, patients may present with swelling, pain, and reduced range of motion in the hands, impacting daily activities. The anatomical considerations include the intricate structure of the hand, comprising bones, ligaments, tendons, and synovial joints, all of which can be affected by the inflammatory processes associated with Felty's syndrome.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Multisystem involvement complicating diagnosis and treatment.
  • Need for detailed documentation of joint involvement and functional limitations.
  • Variability in clinical presentation and severity among patients.
  • Potential for overlapping conditions requiring differential diagnosis.

Audit Risk Factors

  • Inadequate documentation of joint involvement and severity.
  • Failure to capture systemic symptoms associated with Felty's syndrome.
  • Misclassification of the condition due to overlapping symptoms with other rheumatologic disorders.
  • Lack of clarity in the documentation of functional limitations.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Orthopedic documentation should include imaging studies (X-rays, MRIs) to assess joint damage, as well as functional assessments to evaluate the impact on mobility.

Common Clinical Scenarios

Patients may require surgical intervention for joint deformities or severe pain management.

Billing Considerations

Documentation must detail the specific joints involved and the extent of damage to guide treatment decisions.

Rheumatology

Documentation Requirements

Rheumatologic documentation should include laboratory tests for inflammation markers (e.g., ESR, CRP) and assessments of disease activity (e.g., DAS28).

Common Clinical Scenarios

Management of Felty's syndrome may involve immunosuppressive therapies and monitoring for complications.

Billing Considerations

Systemic involvement, such as splenomegaly and neutropenia, must be documented to reflect the severity of the condition.

Physical Medicine

Documentation Requirements

Functional assessments should evaluate the patient's ability to perform activities of daily living and the need for rehabilitation services.

Common Clinical Scenarios

Rehabilitation may focus on improving hand function and mobility through physical therapy.

Billing Considerations

Documentation should address any assistive devices required for mobility and daily activities.

Coding Guidelines

Inclusion Criteria

Use M05.04 When
  • 10 coding guidelines for M05
  • 04 require documentation of laterality (if applicable), severity of joint involvement, and the type of encounter (initial, follow
  • up, etc
  • Accurate coding also necessitates capturing any related conditions or complications

Exclusion Criteria

Do NOT use M05.04 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, aspiration and/or injection into a major joint or bursa

Clinical Scenario

Used for joint swelling management in patients with Felty's syndrome.

Documentation Requirements

Document the joint involved, the procedure performed, and the indication for the procedure.

Specialty Considerations

Orthopedic and rheumatologic considerations for joint management.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, including Felty's syndrome, which can lead to improved patient management and more accurate reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, including Felty's syndrome, which can lead to improved patient management and more accurate reimbursement.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    American College of Rheumatology Guidelines

Coding & Billing References

  • •
    American College of Rheumatology Guidelines

Frequently Asked Questions

What are the key symptoms of Felty's syndrome?

Key symptoms include joint pain and swelling, particularly in the hands, fatigue, recurrent infections due to neutropenia, and splenomegaly. Patients may also experience functional limitations in daily activities due to joint involvement.