If you work in medical billing or coding in Saudi Arabia, you interact with three distinct coding systems daily: ICD-10-AM, ACHI, and SBS. Understanding how they differ and complement each other is essential for accurate claim submission and CCHI compliance.
ICD-10-AM: The Diagnostic Standard
ICD-10-AM (International Classification of Diseases, 10th Revision, Australian Modification) is the classification system used in Saudi Arabia for coding diagnoses. It is an adaptation of the WHO's ICD-10, modified for the Australian healthcare context and adopted by several countries including Saudi Arabia.
What it codes: Diseases, injuries, signs, symptoms, and health conditions.
Structure: Each code starts with a letter followed by numbers and occasionally an additional letter. For example, E11.9 represents Type 2 diabetes without complications.
Why Saudi Arabia uses it: ICD-10-AM offers greater specificity than the base ICD-10. It includes detailed Australian coding standards (ACS) that provide clear guidance on code selection, making it suitable for DRG-based payment systems.
Key fact: The current Saudi edition is ICD-10-AM 10th edition, with 11th edition expected soon.
ACHI: The Procedure Code Set
ACHI (Australian Classification of Health Interventions) codes medical and surgical procedures. It is the procedural companion to ICD-10-AM and was adopted by Saudi Arabia to ensure a consistent coding framework.
What it codes: Surgical operations, medical procedures, diagnostic interventions, and therapeutic procedures.
Structure: ACHI codes are alphanumeric, typically 5-7 characters. They are organized by anatomical site and procedure type.
Key fact: While ACHI covers most procedures, Saudi Arabia added locally relevant codes to address procedures unique to the Saudi healthcare context. These modifications are reflected in the Saudi Billing Standards (SBS).
SBS: The Saudi Billing Standard
SBS (Saudi Billing Standard) is the billing classification system developed specifically for the Saudi market. It serves a different purpose from ICD-10-AM and ACHI.
What it does: SBS maps clinical codes to billing items with assigned prices and reimbursement rules. It is the financial translation layer between clinical coding and insurance payment.
Structure: SBS codes are numeric (e.g., 73100-90-00). Each code represents a billable service with a specific price, coverage rules, and approval requirements.
Key fact: SBS V3 is the current version. It replaced earlier versions to better align with NPHIES requirements and the transition to DRG-based payment.
How They Work Together
Think of the three systems as layers in a stack:
Layer 3: SBS (Billing) → "How much do we get paid?"
Layer 2: ACHI (Procedures) → "What did we do?"
Layer 1: ICD-10-AM (Diagnoses) → "Why did we do it?"
When you submit a claim through NPHIES, the system checks all three:
- The diagnosis (ICD-10-AM) must justify the procedure (ACHI).
- The procedure (ACHI) must map to a valid billable service (SBS).
- The combination must match the patient's coverage and policy rules.
Common Confusions
"Isn't ACHI the same as SBS?" No. ACHI describes what was done clinically. SBS defines what can be billed. Not every ACHI code has a corresponding SBS item, and some SBS items cover multiple ACHI codes.
"Do I need all three to submit a claim?" Yes. NPHIES requires both ICD-10-AM and ACHI codes for clinical validity, and the SBS code determines the reimbursement.
"Which one matters most for DRG?" For DRG classification, ICD-10-AM diagnosis codes and ACHI procedure codes are the primary drivers. SBS codes are secondary.
Practical Tips for Coders
- Always code to the highest level of specificity in ICD-10-AM before moving to ACHI.
- Ensure your ACHI code selection matches the surgical notes, not just the SBS billing code.
- Use the SBS code as a validation check: if no SBS code exists for your ACHI-procedure combination, the claim will likely be rejected.
- Stay updated on version changes for all three systems simultaneously — they are interconnected.
Conclusion
Mastering all three coding systems is essential for any coder working in Saudi Arabia. While ICD-10-AM and ACHI provide the clinical language, SBS translates that language into financial value. Understanding how they interconnect is the key to clean claim submissions and accurate reimbursements.