The medical coding system originated in the 17th century in England to collect statistical data on causes of death. This early system of coding mortality data evolved into the International Classification of Diseases (ICD), which is now in its 10th edition (ICD-10-CM/PCS) and used globally to track health trends and mortality rates. Medical coding translates documentation of a patient's diagnosis, treatment, and services into standardized codes to provide information to payers.

2. Medical
Coding
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History
Role of MC
IDC
CPT
Types of MC
HCPCS

3. Medical Codin
ɤ The medical coding system originated in England during the 17th
Century.
ɤ Statistical data was collected from a system called the London Bills
of Mortality, and the data was organized into numerical codes.
ɤ The Codes were then used to estimate the most recurrent causes
of death.

4. Medical Codin
ɤ The Statistical examination of the mortality rate (causes of death)
was then organized into the “International List of Causes of Death”.
ɤ World Health Organization used this list increasingly to help in
tracking the mortality rates and the international health
developments.
ɤ The list was later developed into the International Classification of
Diseases, its 10th edition now, is ICD – 10- CM/PCS..

5. Medical Codin
ɤ In 1997, the global medical community accepted the ICD
system, which compelled the National Centers for Health
Statistics (NCHS) to extend the ICD system to include cause
of death and clinical diagnosis, such as injuries and illnesses.
ɤ This way to catalog the medical records, make medical
evaluations quicker and easier.

6. Medical Codin
ɤ Medical codes translate that documentation into standardized
codes that tell payers
 Patient’s diagnosis
 Medical necessity for treatment services, or supplies the patient
received.
 Treatments, Services, and supplies the patient received.
 Any usual circumstances or medical condition that affected those
treatment and services.

7. Medical Codin
International Classification of
Diseases
IDC
Current Procedural Terminology
CPT
Healthcare Common Procedure Coding
System
HCPCS