Table 1.
ICD‐8, ICD‐9, and ICD‐10 codes for somatic illnesses from the National Patient Register
| Diagnosis | Examples | ICD8 | ICD9 | ICD10 |
|---|---|---|---|---|
| Neurologic diseases | Headaches, migraine, epilepsy, sleep apnea | 320–358 | 320–349, 356–359 | G00–G47, G60–G73, G91 |
| Infectious and parasitic diseases | Colitis, gastroenteritis, viral infection, genital warts | 000–136 | 001–139 | A00–B99 |
| Immune system disorders | Sarcoidosis, hyperimmunglobulin E (IgE)‐syndrome | 279 | D80–D89 | |
| Respiratory diseases | Tonsillitis, acute respiratory infection, asthma | 460–466, 470–486, 490–493, 502–508, 783 | 460–466, 470–478, 480–487, 490–496, 514, 786 | J00–J46, R05–R06 |
| Gastrointestinal disorders | Gallstones, appendicitis, dyspepsia, gastritis | 530–535, 540–542, 563, 570–577 | 530–535, 540–542, 555–558, 570–577 | K25–K37, K70–K85 |
| Skin and subcutaneous tissue disorders | Dermatitis, hives, eczema, psoriasis | 680–698, 701, 708–709 | 680–698, 701, 708–709 | L00–L54, L90–L95 |
| Musculoskeletal system and connective tissues diseases | Lumbago (low back pain), joint pain, internal derangement of knee | 710–718 | 710–721, 725–729 | M00–M68 |
| Genitourinary system disease | Kidney inflammation, kidney stone, kidney infection, urinary tract infection, ureter stone | 580–584, 590, 592, 594, 601, 604 | 580–583, 590, 592, 594, 601, 604 | N00–N08, N10–N12, N20–N21, N41, N45 |
| Circulatory system diseases | Hypertension, tachycardia, pulmonary embolism, cardiac arrhythmia | 390–448, 450 | 390–448, 456 | I00–I79, I98.3 |
| Endocrine system diseases | Polycystic ovarian syndrome, hyperthyroidism, thyrotoxicosis, autoimmune thyroiditis | 240–246, 250, 251–259 | 240–246, 250, 251–259 | E00–E35 |
| Congenital malformations | Congenital non‐neoplastic nevus, congenital malformation of the breast, prominent ear, congenital heart defect | 740–759 | 740–759 | Q00–Q99 |
| Injury, poisoning, and external causes of morbidity and mortality (excluding suicide) | Fall related accidents, concussion, sprain of ankle | N800–N999, E807–E949, E960–E999 | N800–N995, E807–E949, E960–E999 | S00–T98, V01–X59, X85–Y98 |
The most common diagnoses within our overall cohort were used to generate the examples.