M45.2
Ankylosing spondylitis of cervical region
Clinical Classification Guidelines
Medical Intelligence & Overview
Ankylosing spondylitis (AS) of the cervical region is a chronic inflammatory disease primarily affecting the neck area of the spine. This condition involves inflammation of the vertebrae and joints in the neck, which can lead to pain, stiffness, and eventual loss of mobility if not managed properly. Recognized under the ICD-10 code M45.2, this form of AS specifically targets the cervical spine, the portion of the spine that supports the head and enables neck movements.
Causes & Symptoms
Clinical Causes: Genetic predisposition, especially the presence of the HLA-B27 gene Autoimmune response where the immune system mistakenly attacks the joints and tissues Environmental factors that may trigger inflammation in genetically susceptible individuals Chronic inflammation leading to new bone formation and joint fusion Possibly certain infections that could influence immune response, though this is less well-established
Key Symptoms: Persistent neck pain that worsens with rest and improves with activity Stiffness in the neck, especially in the morning or after periods of inactivity Limited range of motion in the neck, making it difficult to turn or tilt the head Discomfort that may radiate to the shoulders or upper back General fatigue and malaise In advanced cases, there could be visible deformity or fusion of the neck vertebrae
Diagnostic & Treatment
Diagnosis Path: Medical history assessment focusing on symptom progression and family history Physical examination checking neck mobility, posture, and areas of tenderness Imaging tests such as X-rays, MRI, or CT scans to identify inflammation, joint changes, and bone fusion Blood tests to detect markers of inflammation, like elevated C-reactive protein (CRP) or erythrocyte sedimentation rate (ESR) Genetic testing for HLA-B27 may support diagnosis, especially in ambiguous cases
Treatment Protocols: Nonsteroidal anti-inflammatory drugs (NSAIDs) to reduce pain and inflammation Physical therapy exercises tailored to improve flexibility, strength, and posture Regular physical activity to maintain mobility and reduce stiffness Biologic medications such as TNF inhibitors or IL-17 inhibitors for advanced cases Occupational therapy to assist with daily activities if mobility is affected In severe cases, surgical interventions may be considered to correct deformities or fuse unstable vertebrae
Clinical Advice & FAQs
Billing Guidance
Is M45.2 a billable ICD-10 code?
Yes, M45.2 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report M45.2?
Clinical documentation must specify the nature of Ankylosing spondylitis of cervical region and any associated comorbidities for accurate reporting.
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