Applying accurate, complete, and proper medical coding is important to support all services billed in the practice. ACR has developed guidelines and FAQs to help support your selection of appropriate diagnostic and procedural codes.

Coding Guidelines

Medical coding entails the assigning and cataloging of numeric codes to relevant medical data. The diagnosis and procedural codes serve as a universal medical language along with relevant medical information about a patient for reimbursement. To properly code for a patient encounter, it is important to understand the guidelines for the Current Procedural Terminology (CPT) and the International Statistical Classification of Diseases (ICD) systems. See guidelines for each section of coding for a patient encounter.


Find key information on ICD-10 coding guidelines and conventions, structural differences, and implementation.


Find information on the general principles of coding evaluation and management guidelines on documentation; understand the difference between the 1995 and 1997 E/M guidelines, and download E/M templates.


Learn about CPT coding guidelines for billing procedures performed in the rheumatology practice along with the correct coding for modifiers.

Coding Support

Find answers to frequently asked questions to assist with documentation and billing for both diagnostic and procedural coding.


Find helpful references to help you better understand the established requirements and specificity for billing E/M services.

Infusion FAQs

Get answers to key questions about infusion therapy provided in the physician office.

Injection FAQs

Get answers to key questions about injection therapy provided in the physician office.

Incident-to FAQs

Learn about the Medicare billing guidelines for “incident-to” services provided in the physician office.

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