Three Letter AHRQ Codes and Description
| Description | Three Character Abbreviation |
|---|---|
| BLD | Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism |
| CIR | Diseases of the circulatory system |
| DEN | Dental diseases |
| DIG | Diseases of the digestive system |
| EAR | Diseases of the ear and mastoid process |
| END | Endocrine, nutritional, and metabolic diseases |
| EXT | External causes of morbidity |
| EYE | Diseases of the eye and adnexa |
| FAC | Factors influencing health status and contact with health services |
| GEN | Diseases of the genitourinary system |
| INF | Certain infectious and parasitic diseases |
| INJ | Injury, poisoning and certain other consequences of external causes |
| MAL | Congenital malformations, deformations and chromosomal abnormalities |
| MBD | Mental, behavioral, and neurodevelopmental disorders |
| MUS | Diseases of the musculoskeletal system and connective tissue |
| NEO | Neoplasms |
| NVS | Diseases of the nervous system |
| PNL | Certain conditions originating in the perinatal period |
| PRG | Pregnancy, childbirth, and the puerperium |
| RSP | Diseases of the respiratory system |
| SKN | Diseases of the skin and subcutaneous tissue |
| SYM | Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified |