OpenPayer

Anesthesia

Anesthesia covers management and delivery of anesthetic services for operative and diagnostic procedures across body systems, including regional, general, and monitored anesthesia care. CPT code range 00100–01999 encompassing the full anesthesia section with multiple subgroups by anatomic site and procedure type.

Category II Codes

Category II codes document performance measurement activities, supplemental tracking of quality metrics, and non-billable clinical data across encounters. The set spans CPT codes 0001F–9007F and includes composite, process, outcome, history, exam, management, safety, structural, intervention, and non-measure subgroups.

Category III Codes

Procedures and services for emerging, temporary, or experimental technologies across multiple specialties including diagnostic, therapeutic, monitoring, and device-related interventions. CPT code range 0042T–1025T encompassing Category III codes across hundreds of specific entries and subgroups.

Evaluation and Management

Evaluation and Management covers clinical assessments, history-taking, medical decision-making, and coordination of care across outpatient, inpatient, emergency, nursing facility, and telemedicine contexts. CPT range 98000–99499 spans a broad set of E/M codes including office/outpatient, hospital, nursing facility, preventive, and care management services.

Medicine Services and Procedures

Covers a broad range of non-surgical medical procedures and cognitive, diagnostic, therapeutic, and supportive services performed by physicians and nonphysician providers. CPT codes 90281–99607 span vaccines, infusions, dialysis, respiratory, rehab, psychiatry and numerous medicine subgroups.

Modifiers

Modifiers covers supplemental two-character and numeric modifiers appended to CPT codes to clarify circumstances, procedural variations, or payer status affecting reimbursement and claims processing. Code range cpt–modifiers includes a broad set of modifier categories used across specialties, organized into anesthesia, category II, provider services/ASC and other numeric or alpha modifiers.

Multianalyte Assay

Procedures that report multianalyte assays combining multiple biomarkers, algorithms, or clinical data to produce a single index or risk score for diagnosis, prognosis, or therapeutic decision-making. CPT codes 0002M–0020M cover 19 multianalyte assay procedures, including distinct assay-reporting services and algorithm-based risk scores.

Pathology and Laboratory Procedures

Procedures for laboratory testing and pathology services across clinical, anatomic, microbiology, molecular, and transfusion-related diagnostics. CPT range 80047–89398 covering organ/disease panels, chemistry, hematology, microbiology, molecular sequencing, cytology, and related subgroups.

Proprietary Laboratory Analyses

Proprietary Laboratory Analyses covers laboratory tests developed and provided by specific manufacturers or labs, often including multianalyte assays, genomic tests, and specialized diagnostics not in standard panels. CPT codes range from 0001U to 0630U, encompassing over 600 unique proprietary test codes and numerous subgroups for molecular, genomic, and specialized biomarker assays.

Radiology Procedures

Procedures covering diagnostic and therapeutic imaging services including X‑ray, CT, MRI, ultrasound, nuclear medicine, and radiation oncology. CPT code range 70010–79999 encompassing all radiology categories across diagnostic imaging, guidance, nuclear medicine, and treatment delivery.

Surgery

The Current Procedural Terminology (CPT) code range for Surgery 10004-69990 is a medical code set maintained by the American Medical Association.