The International Classification of Diseases, 10th edition, includes Procedure Coding System (ICD-10-PCS) for inpatient procedures. This system contains 7 alphanumeric characters:

• Character 1: Section
• 0: Medical procedures
• 1: Obstetrics
• 2: Placement
• 3: Administrative
• 4: Measurement & Monitoring
• 5: Extracorporeal Assistance & Performance
• 6: Extracorporeal Therapies
• 7: Osteopathic
• 8: Other Procedures
• 9: Chiropractic
• B: Imaging
• C: Nuclear Medicine
• D: Radiation Oncology
• F: Physical Rehabilitation & Diagnostic Audiology
• G: Mental Health
• H: Substance Abuse Treatment
• Character 2: Body system
• Character 3: Root operation
• Character 4: Body region
• Character 5: Approach
• Character 6: Device
• Character 7: Qualifier

Example: The code for extracapsular cataract extraction with posterior chamber intraocular lens implantation, left eye, is 08RKOJZ:

• Character 1 is 0 (medical and surgical).
• Character 2 is 8 (eye).
• Character 3 is R (replacement).
• Character 4 is K (lens, left).
• Character 5 is O (open).
• Character 6 is J (synthetic substitute).
• Character 7 is Z (no qualifier).