- Calcium level
- Carbon dioxide (bicarbonate) level
- Carcinoembryonic antigen (CEA) protein level
- Cardiac arrhythmia / irregular heartbeat
- Cardiac defibrillator implant without cardiac catherization
- Cardiac MRI
- Cardiac valve procedure with cardiac catheterization (major complications)
- Cardiovascular stress test, with interpretation and report
- Cardiovascular stress test, without interpretation and report
- Carpal tunnel release
- Carpal Tunnel Release
- Carpectomy
- Cataract removal
- Cataract removal with insertion of lens
- Cellulitis
- Cervical cancer screening test done manually
- Cervical cancer screening test with interpretation
- Cervical spinal fusion
- Cesarean delivery with post-delivery care
- Cesarean delivery with pre- and post-delivery care
- Cesarean Section (C-Section) Delivery of Child
- Chemical destruction of pre- cancerous lesions of the skin
- Chemical peel (facial)
- Chemical test of the blood to measure presence or concentration of a substance in the blood
- Chemotherapy infusion-additional IV pushes of the same medication
- Chemotherapy infusion-each additional hour
- Chest pain
- Childhood test to screen for developmental disabilities
- Chiropractic manipulation in 1-2 regions
- Chiropractic manipulation in 3-4 regions