Summary & Overview
CPT 73521: Bilateral Hip X‑Ray, Two Views Each
CPT code 73521 is used for diagnostic radiography of both hips, capturing two projections of the left and right hips to assess fractures, swelling, degenerative changes, or other causes of hip pain; the pelvis may be included when performed. This imaging code is nationally relevant because hip radiographs are fundamental to emergency, orthopedic, and primary care workflows for acute injury and chronic hip complaints, influencing diagnostic pathways and subsequent care decisions.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and typical site-of-service usage, an outline of common billing modifiers, and the payer landscape relevant to this radiographic service. The publication summarizes typical utilization patterns, common billing considerations, and related coding references to help billing staff, practice managers, and policy analysts understand how this service is classified and handled across major payers.
The report does not provide treatment recommendations; it focuses on code definition, clinical relevance, payer coverage scope, and operational considerations for billing and revenue cycle teams. Data not available in the input are noted where applicable.
Billing Code Overview
CPT code 73521 describes a diagnostic radiographic procedure that obtains two X-ray images from different projections of both hips (left and right). The exam evaluates for fracture, dislocation, swelling, degenerative change, or other causes of hip pain and may include the pelvis when performed.
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Service type: Diagnostic radiography of bilateral hips (two views each hip)
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Typical site of service: Imaging center, hospital radiology department, or outpatient clinic where radiographic services are performed
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Clinical & Coding Specifications
Clinical Context
A 72-year-old ambulatory female presents to the emergency department after a ground-level fall with acute left hip pain and inability to bear weight. The treating emergency physician orders bilateral hip radiographs to evaluate for femoral neck or intertrochanteric fracture, assess surrounding osseous alignment, and screen for occult pelvic involvement. The patient is registered, consented for diagnostic imaging per facility protocol, and escorted to radiology. A radiologic technologist obtains two projections of both hips (typically anteroposterior pelvis and frog‑leg lateral or modified lateral views as clinically indicated). Images are reviewed by a radiologist who documents fracture presence, displacement, degenerative changes, and any acute osseous or joint effusion. The radiology report is routed to the ordering provider to guide immediate management (e.g., immobilization, orthopedic consultation, analgesia) and to inform disposition (admission, observation, or discharge with outpatient follow-up). Typical sites of service include hospital emergency departments, hospital outpatient radiology departments, and freestanding imaging centers. Service type: diagnostic radiology — plain film, bilateral hips, two views each.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When reporting only the physician interpretation/report separate from facility technical component |