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ICD-10 Guide
ICD-10 CodesM05.051

M05.051

Billable

Felty's syndrome, right hip

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

Code Description

ICD-10 M05.051 is a billable code used to indicate a diagnosis of felty's syndrome, right hip.

Key Diagnostic Point:

Felty's syndrome is a rare complication of rheumatoid arthritis characterized by the triad of rheumatoid arthritis, splenomegaly, and leukopenia. In this context, the right hip is affected, leading to joint inflammation and potential deformity. Anatomically, the hip joint is a ball-and-socket joint formed by the acetabulum of the pelvis and the head of the femur, allowing for a wide range of motion. Pathophysiologically, Felty's syndrome involves autoimmune processes that lead to synovial inflammation, joint erosion, and systemic manifestations. Clinically, patients may present with pain, swelling, and reduced range of motion in the right hip, impacting mobility and quality of life. The condition can also lead to complications such as joint deformities and increased risk of infections due to leukopenia.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Involvement of multiple body systems (musculoskeletal and hematologic)
  • Need for precise documentation of laterality and joint involvement
  • Potential for overlapping diagnoses (e.g., rheumatoid arthritis)
  • Variability in clinical presentation and severity

Audit Risk Factors

  • Inadequate documentation of systemic symptoms
  • Failure to specify laterality and joint involvement
  • Misclassification of rheumatoid arthritis severity
  • Lack of supporting lab results for leukopenia

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Orthopedic documentation should include imaging studies (e.g., X-rays, MRIs) to assess joint damage and functional assessments to evaluate mobility limitations.

Common Clinical Scenarios

Common scenarios include surgical interventions for joint repair or replacement due to severe erosion or deformity.

Billing Considerations

Joint-specific considerations include the degree of joint involvement and the presence of deformities that may affect surgical options.

Rheumatology

Documentation Requirements

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

Common Clinical Scenarios

Scenarios often involve managing systemic symptoms alongside joint treatment, including medication adjustments.

Billing Considerations

Considerations include monitoring for systemic complications and the impact of leukopenia on treatment choices.

Physical Medicine

Documentation Requirements

Functional assessments should evaluate the patient's ability to perform daily activities and any need for assistive devices.

Common Clinical Scenarios

Rehabilitation scenarios may focus on restoring mobility and strength post-surgery or during flare-ups.

Billing Considerations

Mobility limitations should be documented thoroughly, including the need for physical therapy or adaptive equipment.

Coding Guidelines

Inclusion Criteria

Use M05.051 When
  • 10 coding guidelines require specificity in laterality (right hip) and severity of the condition
  • Documentation must reflect the encounter type, whether it is an initial visit, follow
  • up, or post
  • operative assessment

Exclusion Criteria

Do NOT use M05.051 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 managing joint effusion in the right hip due to Felty's syndrome.

Documentation Requirements

Document the indication for the procedure, including joint involvement and any imaging findings.

Specialty Considerations

Orthopedic considerations include assessing joint stability and potential for surgical intervention.

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, enabling better tracking of complex conditions like Felty's syndrome, which involves both joint and systemic manifestations.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, enabling better tracking of complex conditions like Felty's syndrome, which involves both joint and systemic manifestations.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, enabling better tracking of complex conditions like Felty's syndrome, which involves both joint and systemic manifestations.

Resources

Clinical References

  • •
    American College of Rheumatology Guidelines

Coding & Billing References

  • •
    American College of Rheumatology Guidelines

Frequently Asked Questions

What are the common symptoms of Felty's syndrome?

Common symptoms include joint pain and swelling, particularly in the hips, along with systemic symptoms such as fatigue, recurrent infections due to leukopenia, and splenomegaly.