Practice-by-practice billing reference

Medical Billing Code Categories

This page groups common U.S. insurance-billed procedure and session codes by practice area, so related codes stay together. Mental health, therapy, imaging, lab, primary care, specialty care, and procedural services are separated into plain-language sections.

Scope
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Common procedure and session billing codes shown across major outpatient practice areas.
Important
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This is a categorized reference, not a full licensed CPT codebook. Payer rules, modifiers, coverage, and diagnosis requirements still vary.

Codes By Practice

Showing all categories.

CPT descriptors are heavily summarized here. For final claim submission, current payer policy, modifier rules, and licensed code references should still be checked before use.