P20 — HCPCS Level II Codes
- P2028 Cephalin floculation, blood billable
- P2029 Congo red, blood billable
- P2031 Hair analysis (excluding arsenic) billable
- P2033 Thymol turbidity, blood billable
- P2038 Mucoprotein, blood (seromucoid) (medical necessity procedure) billable