Percentage of Visits by Primary Diagnosis Group
| Percentage of Visits, Weighted | |||
|---|---|---|---|
| Primary Diagnosis Group | ICD-9-CM Codes | PRINS | NAMCS Mean (95% CI) |
| ICD-9-CM = International Classification of Diseases, Ninth Revision, Clinical Modification; PRINS = Primary Care Network Survey; NAMCS = National Ambulatory Medical Care Survey; CI = confidence interval. | |||
| * Includes diseases of the blood and organs (280–289); complications of pregnancy, childbirth, and the puerperium (630–677); congenital anomalies (740–759); certain conditions originating in the perinatal period (760–779); and diagnoses that were uncodable (patient left before being seen; patient was transferred to another facility; health maintenance organization did not authorize treatment; entry was “none,” “no diagnosis,” “no disease,” or “healthy”). Unknown includes blank diagnoses, uncodable diagnoses, and illegible diagnoses. | |||
| Infectious and parasitic diseases | 001–139 | 4.7 | 3.5 (3.3–3.7) |
| Neoplasm | 140–239 | 0.8 | 1.1 (1.0–1.2) |
| Endocrine, nutritional, metabolic diseases; immunity disorders | 240–279 | 10.2 | 9.5 (9.0–9.9) |
| Mental disorders | 290–319 | 5.3 | 4.2 (4.0–4.4) |
| Diseases of the nervous system and sense organs | 320–389 | 7.6 | 6.1 (5.9–6.4) |
| Diseases of the circulatory system | 390–459 | 9.9 | 11.9 (11.3–12.6) |
| Diseases of the respiratory system | 460–519 | 15.8 | 16.5 (16.0–17.1) |
| Diseases of the digestive system | 520–579 | 4.0 | 4.2 (4.0–4.4) |
| Diseases of the genitourinary system | 580–629 | 3.6 | 3.6 (3.4–3.8) |
| Diseases of the skin and subcutaneous tissue | 680–709 | 4.4 | 3.7 (3.5–3.9) |
| Diseases of the musculoskeletal and connective tissue | 710–739 | 5.1 | 8.0 (7.6–8.4) |
| Symptoms, signs, and ill-defined conditions | 780–799 | 8.0 | 8.0 (7.7–8.3) |
| Injury and poisoning | 800–999 | 3.7 | 4.5 (4.3–4.8) |
| Supplementary classification | V01–V82 | 15.3 | 13.8 (13.1–14.5) |
| All other diagnoses/unknown | –* | 1.7 | 1.3 (1.2–1.4) |