Visit Counts by ICD-9-CM Diagnostic Categories for Prenatal Visits with 1 or More Secondary and Tertiary Non–Pregnancy-Related Diagnoses, NAMCS 1995–2004
| ICD-9-CM=International Classification of Diseases, 9th Revision, Clinical Modification; NAMCS = National Ambulatory Medical Care Survey. | |
| Visits to obstetricians (ICD-9-CM diagnostic category) | |
| Infectious and parasitic diseases (001–139) | 37 |
| Neoplasms (140–239) | 5 |
| Endocrine, nutritional and metabolic diseases, and immunity disorders (240–279) | 65 |
| Diseases of the blood and blood-forming organs (280–289) | 20 |
| Mental disorders (290–319) | 21 |
| Diseases of the nervous system and sense organs (320–389) | 6 |
| Diseases of the circulatory system (390–459) | 4 |
| Diseases of the respiratory system (460–519) | 22 |
| Diseases of the digestive system (520–579) | 8 |
| Diseases of the genitourinary system (580–629) | 54 |
| Diseases of the skin and subcutaneous tissue (680–709) | 6 |
| Diseases of the musculoskeletal system and connective tissue (710–739) | 13 |
| Congenital anomalies (740–759) | 1 |
| Symptoms, signs, and ill-defined conditions (780–799) | 62 |
| Injury and poisoning (800–999) | 3 |
| Supplementary classification of factors influencing health status and contact with health services (V01-V85) | 106 |
| Total | 433 |
| Visits to family physicians (ICD-9-CM diagnostic category) | |
| Infectious and parasitic diseases (001–139) | 6 |
| Neoplasms (140–239) | 0 |
| Endocrine, nutritional and metabolic diseases, and immunity disorders (240–279) | 2 |
| Diseases of the blood and blood-forming organs (280–289) | 2 |
| Mental disorders (290–319) | 14 |
| Diseases of the nervous system and sense organs (320–389) | 0 |
| Diseases of the circulatory system (390–459) | 2 |
| Diseases of the respiratory system (460–519) | 11 |
| Diseases of the digestive system (520–579) | 2 |
| Diseases of the genitourinary system (580–629) | 13 |
| Diseases of the skin and subcutaneous tissue (680–709) | 0 |
| Diseases of the musculoskeletal system and connective tissue (710–739) | 5 |
| Congenital anomalies (740–759) | 1 |
| Symptoms, signs, and ill-defined conditions (780–799) | 13 |
| Injury and poisoning (800–999) | 2 |
| Supplementary classification of factors influencing health status and contact with health services (V01-V85) | 10 |
| Total | 83 |