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M25.859
ICD-10-CM
Femoroacetabular Impingement

Femoroacetabular impingement (FAI), also known as hip impingement syndrome, diagnosis involves specific clinical documentation and medical coding for accurate healthcare records. Learn about FAI symptoms, diagnostic criteria, relevant ICD-10 and CPT codes for billing and insurance purposes, and treatment options. This comprehensive resource helps healthcare professionals ensure proper documentation and coding related to femoroacetabular impingement and hip impingement syndrome.

Also known as

FAI
Hip Impingement Syndrome

Diagnosis Snapshot

Key Facts
  • Definition : Abnormal bone growth in the hip joint causing pain and limited range of motion.
  • Clinical Signs : Groin pain, stiffness, clicking or catching sensation in the hip, limited hip flexion.
  • Common Settings : Orthopedic clinics, sports medicine clinics, physical therapy centers.

Related ICD-10 Code Ranges

Complete code families applicable to AAPC M25.859 Coding
M25.85

Other specified joint derangements

Covers other specific joint derangements not elsewhere classified.

M25.9

Joint derangement, unspecified

Used for unspecified joint derangements, when more detail is unavailable.

M96.8

Other specified osteochondropathies

Includes other osteochondropathies not classified elsewhere.

Code-Specific Guidance

Decision Tree for

Follow this step-by-step guide to choose the correct ICD-10 code.

Is the femoroacetabular impingement (FAI) specified as cam type?

Code Comparison

Related Codes Comparison

When to use each related code

Description
Bone overgrowth in hip joint, causing pain and stiffness.
Deterioration of hip cartilage, causing pain and stiffness.
Inflammation of hip bursa, causing sharp pain with movement.

Documentation Best Practices

Documentation Checklist
  • Document specific location of pain (anterior, lateral, groin).
  • Record ROM limitations with degrees of restriction (flexion, internal/external rotation).
  • Note any positive impingement tests (FADIR, FABER).
  • Describe imaging findings confirming cam, pincer, or mixed-type FAI.
  • Include patient reported symptoms (clicking, stiffness, pain with activity).

Coding and Audit Risks

Common Risks
  • Unspecified FAI Type

    Coding FAI without specifying Pincer, Cam, or Mixed type leads to inaccurate severity reflection and reimbursement.

  • Lateral vs. Anterior FAI

    Incorrectly coding lateral FAI as anterior (or vice versa) impacts surgical planning and claims processing.

  • FAI with Labral Tear

    Failing to code coexisting labral tear with FAI undercodes severity, impacting quality metrics and reimbursement.

Mitigation Tips

Best Practices
  • Conservative FAI treatment: PT, NSAIDs, activity modification (ICD-10 M25.85)
  • Document FAI cam, pincer, or mixed morphology for accurate coding (ICD-10 M24.45)
  • Correlate FAI imaging findings (x-ray, MRI) with clinical symptoms for CDI
  • Ensure pre-authorization for FAI surgery, including arthroscopy, per compliance
  • Post-op FAI rehab documentation crucial for optimal outcomes and billing

Clinical Decision Support

Checklist
  • Verify anterior groin/hip pain during flexion, internal rotation
  • Assess for limited hip internal rotation/abduction
  • Check for positive FADIR/FABER test
  • Review imaging (X-ray, MRI) for femoral/acetabular abnormalities
  • Document FAI type (Pincer, Cam, Mixed) for accurate ICD-10 coding

Reimbursement and Quality Metrics

Impact Summary
  • Femoroacetabular impingement (FAI) coding accuracy impacts reimbursement for arthroscopy, osteoplasty, and other hip procedures.
  • Accurate FAI diagnosis coding (ICD-10: M24.45) improves hospital quality reporting metrics for hip preservation surgery.
  • Proper documentation of FAI subtype (cam, pincer, mixed) optimizes billing and reflects surgical complexity.
  • Missed FAI diagnoses can lead to claim denials and negatively affect hospital reimbursement and quality scores.

Streamline Your Medical Coding

Let S10.AI help you select the most accurate ICD-10 codes. Our AI-powered assistant ensures compliance and reduces coding errors.

Frequently Asked Questions

Common Questions and Answers

Q: What are the most effective differential diagnostic considerations for femoroacetabular impingement (FAI) in young adult athletes?

A: Differential diagnosis of femoroacetabular impingement (FAI) in young athletes requires careful consideration of conditions mimicking its symptoms, particularly those common in active individuals. These include labral tears, articular cartilage damage, athletic pubalgia (sports hernia), iliopsoas tendinopathy, and stress fractures of the femoral neck or pelvis. Furthermore, intra-articular pathologies like loose bodies and early osteoarthritis can present similarly. Accurate diagnosis necessitates a thorough clinical examination, including specific maneuvers like the FADIR and FABER tests, combined with imaging studies such as plain radiographs and MRI arthrography to assess cartilage and labral integrity. Explore how dynamic ultrasound assessment can add value in evaluating soft tissue involvement during range of motion. Consider implementing a standardized diagnostic pathway to ensure all potential diagnoses are evaluated, improving patient outcomes and minimizing misdiagnosis.

Q: How can clinicians differentiate between cam-type, pincer-type, and combined femoroacetabular impingement (FAI) during physical examination and imaging interpretation?

A: Distinguishing between cam, pincer, and combined FAI hinges on understanding the underlying morphological abnormalities. Cam-type FAI involves an aspherical femoral head, often identified through a positive FADIR test and characteristic 'pistol grip' deformity on radiographs. Pincer-type FAI, characterized by acetabular overcoverage, might present with a positive FABER test and is visible on radiographs as 'crossover sign' or prominent anterior acetabular wall. Combined impingement, as the name suggests, displays features of both cam and pincer types. Accurate classification requires careful correlation of physical exam findings with imaging, including radiographic measurements like alpha angle and lateral center-edge angle, as well as MRI evaluation of labral and cartilage damage. Learn more about advanced imaging techniques, like 3D CT scans, for detailed morphological assessment and pre-operative planning.

Quick Tips

Practical Coding Tips
  • Code FAI with M25.85
  • Document specific impingement type
  • Check for labral tears, code if present
  • Consider chondral damage, code separately
  • Add laterality (RT/LT) to ICD-10

Documentation Templates

Patient presents with complaints consistent with femoroacetabular impingement (FAI), also known as hip impingement syndrome.  The patient reports experiencing deep, anterior hip or groin pain, which may radiate to the lateral hip, buttock, or anterior thigh.  The onset of pain is described as insidious and activity-related, exacerbated by prolonged sitting, hip flexion activities such as squatting or climbing stairs, and pivoting movements.  Physical examination reveals limited range of motion in the affected hip, particularly with internal rotation and flexion.  Positive findings may include a positive FADIR test (flexion, adduction, internal rotation) and anterior impingement test, eliciting the patient's characteristic hip pain.  Differential diagnoses considered include labral tear, osteoarthritis, hip flexor tendinitis, and athletic pubalgia.  Imaging studies, such as plain radiographs and MRI of the hip, are ordered to evaluate for abnormal bone morphology, such as a cam lesion or pincer lesion, and to assess the integrity of the labrum and articular cartilage.  The patient's symptoms, physical exam findings, and imaging results support a diagnosis of femoroacetabular impingement.  Initial treatment will focus on conservative management, including activity modification, physical therapy focusing on hip strengthening and flexibility exercises, and NSAIDs for pain management.  Patient education regarding activity modifications and proper body mechanics will be provided.  Referral to an orthopedic specialist will be considered if conservative measures fail to provide adequate symptom relief or if surgical intervention, such as hip arthroscopy for labral repair or osteochondroplasty, is deemed necessary.  Follow-up appointment scheduled in four weeks to assess response to treatment.