What type of services are covered by the codes in the range 90000-99999?

The range of codes 90000-99999 in the CPT coding system is designated for miscellaneous services, which primarily include pathology and laboratory services. This area encompasses a wide variety of diagnostic tests and procedures that are essential for identifying diseases and managing patient care.

Lab tests and pathology services are integral to the healthcare system, as they provide critical information that supports treatment decisions. By using these codes, healthcare providers can communicate the specific types of services rendered, ensuring accurate billing and documentation for reimbursement purposes. Thus, the correct choice reflects the broad category of services that the listed codes encompass, specifically capturing the nuances of diagnostic and laboratory interactions in patient care.

Other options, while representing important medical functions, do not fall under the specified range of codes. Major surgical procedures would be categorized in a different section aimed directly at surgical interventions, while emergency medical services and psychiatric services have their own dedicated coding structures in the CPT.