What are ICD-10 Codes?
ICD (International Statistical Classification of Diseases and Related Health problems) is now on its 10th revision. ICD-10 codes are the byproduct of that revision. This medical classification list is generated by the World Health Organization (WHO), and is used to help healthcare providers identify and code health conditions.
ICD-10 is required for use by physicians and healthcare providers under the Health Insurance Portability & Accountability Act (HIPAA) and will replace all ICD-9 code sets.
Many more new diagnoses can be tracked using ICD-10 than with ICD-9. Some expanded code sets, like ICD-10-CM, have over 70,000 codes.
ICD-10-CM Codes are:
- 3-7 characters in length
- The first character is alpha, characters two and three are numeric and characters four through seven are alpha or numeric
ICD-10-CM Code Structure:
- Characters 1 through 3 = Category
- Characters 4 through 6 = Etiology, anatomic site, severity, or other clinical detail
- Character 7 – Extension
List of ICD-10 Codes
| Chapter | Code Range | Details |
|---|---|---|
| 1 | A00-B99 | Certain infectious and parasitic diseases |
| 2 | C00-D49 | Neoplasms |
| 3 | D50-D89 | Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism |
| 4 | E00-E89 | Endocrine, nutritional and metabolic diseases |
| 5 | F01-F99 | Mental, Behavioral and Neurodevelopmental disorders |
| 6 | G00-G99 | Diseases of the nervous system |
| 7 | H00-H59 | Diseases of the eye and adnexa |
| 8 | H60-H95 | Diseases of the ear and mastoid process |
| 9 | I00-I99 | Diseases of the circulatory system |
| 10 | J00-J99 | Diseases of the respiratory system |
| 11 | K00-K95 | Diseases of the digestive system |
| 12 | L00-L99 | Diseases of the skin and subcutaneous tissue |
| 13 | M00-M99 | Diseases of the musculoskeletal system and connective tissue |
| 14 | N00-N99 | Diseases of the genitourinary system |
| 15 | O00-O9A | Pregnancy, childbirth and the puerperium |
| 16 | P00-P96 | Certain conditions originating in the perinatal period |
| 17 | Q00-Q99 | Congenital malformations, deformations and chromosomal abnormalities |
| 18 | R00-R99 | Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified |
| 19 | S00-T88 | Injury, poisoning and certain other consequences of external causes |
| 20 | V00-Y99 | External causes of morbidity |
| 21 | Z00-Z99 | Factors influencing health status and contact with health services |
