Final answer:
Outpatient coding is used for services where the patient is not admitted to a hospital and often uses ICD-10-CM codes, as well as CPT and HCPCS codes for procedures. Inpatient coding is used for admitted patients in a hospital and utilizes both ICD-10-CM for diagnoses and ICD-10-PCS for in-depth procedures.
Step-by-step explanation:
The difference between outpatient and inpatient coding relates to the setting and complexity of medical services provided. Outpatient coding involves coding for services where the patient receives care but is not admitted to a hospital, such as doctor's office visits, ambulatory services, and emergency department services that don't result in admission. For these services, medical coders use the ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) for diagnoses and may also use CPT (Current Procedural Terminology) or HCPCS (Healthcare Common Procedure Coding System) codes for the procedures and services administered.
In contrast, inpatient coders work with cases where a patient is formally admitted to a healthcare facility such as a hospital. They use both ICD-10-CM for diagnoses and ICD-10-PCS (Procedure Coding System) for the detailed and complex procedures performed during hospitalization. Inpatient coders must capture the full spectrum of care provided during a patient's stay, which typically involves a higher level of detail and complexity than outpatient coding.
To answer the original multiple-choice question, the correct statement is number 4: Inpatient coders use both ICD-10-CM and ICD-10-PCS.