{description: These codes are derived from the NUBC Uniform Billing (UB-04) Type of Bill (TOB) codes.  The fourth digit of the TOB code defines the frequency of the bill for the institutional and electronic professional claim., package_name: hl7.fhir.us.davinci, name: PCTGFEFrequency, type: null, package_version: pct-1.1.0, class: unknown, kind: null, url: 'http://hl7.org/fhir/us/davinci-pct/CodeSystem/PCTGFEFrequency', version: 1.1.0}