Please add references to ICD-10 and CPT

Existing Wording:

Until COVID-19 and SARS-Cov-2 were discovered, codes to describe the disease, diagnostic tests, antibody tests, or test results did not exist because these concepts did not yet exist. Since then organizations like LOINC, SNOMED and CMS responsible for managing code systems used by EHR and other Health IT systems have produced codes where needed, and developed value sets and guidelines for coding conditions and situations related to COVID-19 including diagnosis, evaluation, treatment, procedures, and medications associated with the disease.