Problem:
The patient had a previous systemic reaction to penicillin and subsequently needed to be treated with penicillin for streptococcus infection. The 500 mg penicillin was infused gradually over a period of 1 hour by IV in a carefully controlled environment. This type of desensitization required frequent monitoring of vital signs and constant observation. Appropriate monitoring and safety measures were available during the process.
What are the ICD 10, CPT and HCPCS codes for the above scenario? Do not charge for penicillin nor infusion code.