Table 2.
Top 50 ICPC-2-R diagnosis codes of first-visit patients who presented to the Department of Internal Medicine at the Ikeda City Hospital without a referral on Fridays between April 2012 and March 2016
| Ranking | ICPC-2-R code | ICPC-2-R title | Number of cases | Percentage | Cumulative percentage |
|---|---|---|---|---|---|
| 1 | R74 | Upper respiratory infection, acute | 86 | 11.2 | 11.2 |
| 2 | D73 | Gastroenteritis, presumed infection | 49 | 6.4 | 17.6 |
| 3 | D87 | Stomach function disorder | 33 | 4.3 | 22.0 |
| 4 | R80 | Influenza | 28 | 3.7 | 25.6 |
| 5 | D84 | Esophagus disease | 20 | 2.6 | 28.2 |
| 6 | R96 | Asthma | 19 | 2.5 | 30.7 |
| 7 | A97 | No disease | 15 | 2.0 | 32.7 |
| 7 | D06 | Abdominal pain, localized, other | 15 | 2.0 | 34.6 |
| 9 | D12 | Constipation | 14 | 1.8 | 36.5 |
| 9 | N01 | Headache | 14 | 1.8 | 38.3 |
| 11 | D78 | Neoplasm of digestive system, benign/unspecified | 13 | 1.7 | 40.0 |
| 12 | R05 | Cough | 12 | 1.6 | 41.6 |
| 13 | R81 | Pneumonia | 11 | 1.4 | 43.0 |
| 14 | B80 | Iron-deficiency anemia | 10 | 1.3 | 44.3 |
| 14 | D02 | Abdominal pain, epigastric | 10 | 1.3 | 45.6 |
| 16 | D97 | Liver disease NOS | 9 | 1.2 | 46.8 |
| 16 | K86 | Hypertension, uncomplicated | 9 | 1.2 | 48.0 |
| 16 | L85 | Acquired deformity of spine | 9 | 1.2 | 49.2 |
| 16 | N95 | Tension headache | 9 | 1.2 | 50.3 |
| 16 | T90 | Diabetes, non-insulin dependent | 9 | 1.2 | 51.5 |
| 21 | L02 | Back symptom/complaint | 8 | 1.0 | 52.5 |
| 21 | N17 | Vertigo/dizziness | 8 | 1.0 | 53.6 |
| 23 | A11 | Chest pain NOS | 7 | 0.9 | 54.5 |
| 23 | D75 | Malignant neoplasm colon/rectum | 7 | 0.9 | 55.4 |
| 23 | L01 | Neck symptom/complaint | 7 | 0.9 | 56.3 |
| 23 | L03 | Low back symptom/complaint | 7 | 0.9 | 57.3 |
| 23 | R01 | Pain, respiratory system | 7 | 0.9 | 58.2 |
| 23 | T81 | Goiter | 7 | 0.9 | 59.1 |
| 29 | A91 | Abnormal result investigation NOS | 6 | 0.8 | 59.9 |
| 29 | D98 | Cholecystitis/cholelithiasis | 6 | 0.8 | 60.7 |
| 29 | K90 | Stroke/cerebrovascular accident | 6 | 0.8 | 61.4 |
| 29 | R75 | Sinusitis acute/chronic | 6 | 0.8 | 62.2 |
| 29 | R78 | Acute bronchitis/bronchiolitis | 6 | 0.8 | 63.0 |
| 29 | U70 | Pyelonephritis/pyelitis | 6 | 0.8 | 63.8 |
| 29 | U88 | Glomerulonephritis/nephrosis | 6 | 0.8 | 64.6 |
| 36 | B70 | Lymphadenitis, acute | 5 | 0.7 | 65.2 |
| 36 | D70 | Gastrointestinal infection | 5 | 0.7 | 65.9 |
| 36 | H82 | Vertiginous syndromes | 5 | 0.7 | 66.5 |
| 36 | K96 | Hemorrhoids | 5 | 0.7 | 67.2 |
| 36 | L14 | Leg/thigh symptom/complaint | 5 | 0.7 | 67.8 |
| 36 | P74 | Anxiety disorder/anxiety state | 5 | 0.7 | 68.5 |
| 36 | P76 | Depressive disorder | 5 | 0.7 | 69.2 |
| 36 | T85 | Hyperthyroidism/thyrotoxicosis | 5 | 0.7 | 69.8 |
| 44 | A03 | Fever | 4 | 0.5 | 70.3 |
| 44 | A75 | Infectious mononucleosis | 4 | 0.5 | 70.8 |
| 44 | A76 | Viral exanthem, other | 4 | 0.5 | 71.4 |
| 44 | A85 | Adverse effect medical agent | 4 | 0.5 | 71.9 |
| 44 | B02 | Lymph gland(s) enlarged/painful | 4 | 0.5 | 72.4 |
| 44 | D01 | Abdominal pain/cramps, general | 4 | 0.5 | 72.9 |
| 44 | D08 | Flatulence/gas/belching | 4 | 0.5 | 73.5 |
| 44 | D11 | Diarrhea | 4 | 0.5 | 74.0 |
| 44 | D86 | Peptic ulcer, other | 4 | 0.5 | 74.5 |
| 44 | D92 | Diverticular disease | 4 | 0.5 | 75.0 |
| 44 | L99 | Musculoskeletal disease, other | 4 | 0.5 | 75.6 |
| 44 | N06 | Sensation disturbances, other | 4 | 0.5 | 76.1 |
| 44 | P75 | Somatization disorder | 4 | 0.5 | 76.6 |
| 44 | R72 | Strep throat | 4 | 0.5 | 77.1 |
| 44 | R99 | Respiratory disease, other | 4 | 0.5 | 77.6 |
| 44 | U99 | Urinary disease, other | 4 | 0.5 | 78.2 |
| Others | 167 | 21.8 | 100.0 | ||
| Total | 765 | 100.0 |
Abbreviations: ICPC-2-R, International Classification of Primary Care, Revised Second edition; NOS, not otherwise specified.