All work must be performed in accordance with the rules, regulations and coding conventions of ICD-CM Official Guidelines for Coding and Reporting, Coding Clinic published by the American Hospital Association, the ICD-CM, ICD-PCS, CPT and HCPCS code book, CPT Assistant, NCCI Edits, CMS, OSHPD and Kaiser Permanentes organizational and institutional coding guidelines. The Inpatient Coder is expected to code and abstract Observation (OBS), Hospital Ambulatory Surgery (HAS), Emergency Department (ED), and complex Hospital Outpatient Visit (CHOY) services when needed.