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v1.0.0
ICD-10 Guide
ICD-10 CodesM05.05

M05.05

Billable

Felty's syndrome, hip

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

Code Description

ICD-10 M05.05 is a billable code used to indicate a diagnosis of felty's syndrome, 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 the context of the hip, patients may experience significant joint involvement leading to pain, stiffness, and functional limitations. 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 inflammation of the synovial membrane, resulting in joint damage and systemic manifestations. Clinically, patients may present with decreased range of motion, difficulty in weight-bearing activities, and increased susceptibility to infections due to leukopenia. The hip joint's involvement can exacerbate mobility issues, necessitating comprehensive management strategies.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Multisystem involvement complicating diagnosis and treatment
  • Need for precise documentation of joint-specific symptoms
  • Variability in clinical presentation among patients
  • Potential for overlapping conditions requiring differential diagnosis

Audit Risk Factors

  • Inadequate documentation of systemic symptoms
  • Failure to specify laterality of hip involvement
  • Misclassification of joint involvement severity
  • Omission of relevant comorbid conditions

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Orthopedic documentation should include imaging studies (e.g., X-rays, MRIs) to assess joint integrity, functional assessments to evaluate mobility, and detailed descriptions of any surgical interventions.

Common Clinical Scenarios

Common scenarios include surgical interventions such as hip arthroplasty or joint injections for pain management.

Billing Considerations

Joint-specific considerations include documenting the extent of joint damage and any associated deformities.

Rheumatology

Documentation Requirements

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

Common Clinical Scenarios

Scenarios often involve managing systemic symptoms alongside joint pain, including medication adjustments for disease-modifying antirheumatic drugs (DMARDs).

Billing Considerations

Considerations include monitoring for complications related to leukopenia and systemic involvement.

Physical Medicine

Documentation Requirements

Functional assessments should evaluate the patient's ability to perform daily activities and any rehabilitation needs, including physical therapy interventions.

Common Clinical Scenarios

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

Billing Considerations

Mobility limitations may necessitate the use of assistive devices, which should be documented.

Coding Guidelines

Inclusion Criteria

Use M05.05 When
  • 10 coding guidelines for M05
  • 05 require documentation of laterality (right, left, bilateral) and the severity of the condition
  • Encounter type (initial, subsequent, sequela) must also be specified

Exclusion Criteria

Do NOT use M05.05 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, hip joint

Clinical Scenario

Used for aspiration of joint fluid in cases of suspected infection or inflammation.

Documentation Requirements

Document the indication for the procedure, findings, and any therapeutic interventions performed.

Specialty Considerations

Orthopedic considerations include assessing joint stability and potential for further 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, including Felty's syndrome, which can lead to improved tracking of disease prevalence and treatment outcomes.

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 tracking of disease prevalence and treatment outcomes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, including Felty's syndrome, which can lead to improved tracking of disease prevalence and treatment outcomes.

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, splenomegaly, and recurrent infections due to leukopenia.