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ICD-10 Guide
ICD-10 CodesM05.072

M05.072

Billable

Felty's syndrome, left ankle and foot

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

Code Description

ICD-10 M05.072 is a billable code used to indicate a diagnosis of felty's syndrome, left ankle and foot.

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 left ankle and foot, patients may experience significant joint inflammation, pain, and deformity due to the underlying autoimmune process. Anatomically, the left ankle consists of the tibia, fibula, and talus, while the foot includes multiple bones such as the metatarsals and phalanges. The inflammatory process can lead to synovitis, erosion of joint surfaces, and ultimately joint destruction. Clinically, patients may present with swelling, tenderness, and limited range of motion in the affected joints, impacting their mobility and quality of life. The pathophysiology involves immune-mediated damage to synovial tissues, leading to chronic inflammation and systemic manifestations. Diagnosis is often supported by laboratory findings, including rheumatoid factor and anti-citrullinated protein antibodies, alongside imaging studies to assess joint involvement.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Requires understanding of autoimmune disease mechanisms
  • Involves multiple anatomical structures and their interactions
  • Documentation must reflect systemic involvement and severity
  • Differentiation from other forms of arthritis is necessary

Audit Risk Factors

  • Inadequate documentation of systemic symptoms
  • Failure to specify laterality correctly
  • Misclassification of joint involvement
  • Lack of supporting lab results or imaging studies

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Orthopedic documentation should include imaging studies (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 deformity or pain.

Billing Considerations

Joint-specific considerations include documenting the extent of joint erosion and functional impairment.

Rheumatology

Documentation Requirements

Rheumatologic documentation must include inflammation markers (ESR, CRP) and assessments of disease activity (DAS28 score).

Common Clinical Scenarios

Scenarios often involve managing systemic symptoms and adjusting immunosuppressive therapies.

Billing Considerations

Consideration of systemic involvement, such as splenomegaly and neutropenia, is crucial for comprehensive care.

Physical Medicine

Documentation Requirements

Functional assessments should detail mobility limitations and rehabilitation needs, including assistive devices.

Common Clinical Scenarios

Rehabilitation scenarios may focus on restoring function post-surgery or managing chronic pain.

Billing Considerations

Mobility limitations and the need for adaptive strategies are critical for patient management.

Coding Guidelines

Inclusion Criteria

Use M05.072 When
  • Official coding guidelines require accurate documentation of laterality (left ankle and foot), severity of the condition, and the type of encounter (initial, follow
  • up, or acute exacerbation)

Exclusion Criteria

Do NOT use M05.072 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 left ankle due to Felty's syndrome.

Documentation Requirements

Documentation must include the indication for the procedure, joint involved, and any imaging guidance used.

Specialty Considerations

Orthopedic and rheumatologic considerations include assessing joint health 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, particularly those with systemic involvement like Felty's syndrome, improving the accuracy of patient records and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, particularly those with systemic involvement like Felty's syndrome, improving the accuracy of patient records and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding musculoskeletal conditions, particularly those with systemic involvement like Felty's syndrome, improving the accuracy of patient records and treatment plans.

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 ankles and feet, splenomegaly, and recurrent infections due to neutropenia. Patients may also experience fatigue and systemic symptoms related to rheumatoid arthritis.