The ICD-10-CM (International Classification of Diseases, 10th Revision, Clinical Modification) is a system of codes used to classify diseases and other health conditions. It is used by healthcare providers and insurance companies to communicate about diagnoses and to track health care costs.
The ICD-10-CM has over 18,000 codes, which are divided into chapters based on the body system or condition. For example, there are chapters for diseases of the circulatory system, diseases of the respiratory system, neoplasms, and mental disorders.
Each code consists of a letter and 4 digits. The letter indicates the chapter, and the digits represent the specific disease or condition. For example, the code A00.9 is for cholera, unspecified.
The ICD-10-CM is updated every few years to add new codes and to make changes to existing codes. The current version is the ICD-10-CM 2023.
You can find a list of ICD-10-CM codes online or in medical coding textbooks. There are also many websites that offer free ICD-10-CM code lookup tools.
Here are some of the most common ICD-10-CM codes:
ICD-10-CM Diagnosis Codes
| A00.0 | ‑ | B99.9 | 1. Certain infectious and parasitic diseases (A00-B99) | ||
| C00.0 | ‑ | D49.9 | 2. Neoplasms (C00-D49) | ||
| D50.0 | ‑ | D89.9 | 3. Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) | ||
| E00.0 | ‑ | E89.89 | 4. Endocrine, nutritional and metabolic diseases (E00-E89) | ||
| F01.50 | ‑ | F99 | 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99) | ||
| G00.0 | ‑ | G99.8 | 6. Diseases of the nervous system (G00-G99) | ||
| H00.011 | ‑ | H59.89 | 7. Diseases of the eye and adnexa (H00-H59) | ||
| H60.00 | ‑ | H95.89 | 8. Diseases of the ear and mastoid process (H60-H95) | ||
| I00 | ‑ | I99.9 | 9. Diseases of the circulatory system (I00-I99) | ||
| J00 | ‑ | J99 | 10. Diseases of the respiratory system (J00-J99) | ||
| K00.0 | ‑ | K95.89 | 11. Diseases of the digestive system (K00-K95) | ||
| L00 | ‑ | L99 | 12. Diseases of the skin and subcutaneous tissue (L00-L99) | ||
| M00.00 | ‑ | M99.9 | 13. Diseases of the musculoskeletal system and connective tissue (M00-M99) | ||
| N00.0 | ‑ | N99.89 | 14. Diseases of the genitourinary system (N00-N99) | ||
| O00.00 | ‑ | O9A.53 | 15. Pregnancy, childbirth and the puerperium (O00-O9A) | ||
| P00.0 | ‑ | P96.9 | 16. Certain conditions originating in the perinatal period (P00-P96) | ||
| Q00.0 | ‑ | Q99.9 | 17. Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) | ||
| R00.0 | ‑ | R99 | 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) | ||
| S00.00XA | ‑ | T88.9XXS | 19. Injury, poisoning and certain other consequences of external causes (S00-T88) | ||
| V00.01XA | ‑ | Y99.9 | 20. External causes of morbidity (V00-Y99) | ||
| Z00.00 | ‑ | Z99.89 | 21. Factors influencing health status and contact with health services (Z00-Z99) | ||
| U07.0 | ‑ | U09.9 | 22. Codes for special purposes (U00-U85) | ||
| A04.7 | ‑ | Z98.89 | -/+ Deleted, Replaced, Expanded Codes | ||
If you are looking for a specific ICD-10-CM code, you can use the search function on a medical coding website or textbook. You can also use the ICD-10-CM tabular list, which is a alphabetical listing of all the codes.