ICD‐9‐CM codes	Comorbidity
250.0–250.9	Diabetes
401–405	Hypertension
410–414, 429.7	Ischemic heart disease
428, 416.9	Heart failure/pulmonary heart disease
429 (EXCLUDING 429.7) 093.2, 394–397.1, 424, 746.3–746.6, V42.2, V43.3, 393, 397.9, 398, 423, 391, 420, 421, 422, 425, 745, V15.1, V42.2, V43.2, V45.0, V45.81, V45.82 PROCEDURES: 36.1, 36.0,35, 37.0, 37.1, 37.3, 37.4, 37.5, 37.6, 37.9	Other chronic heart diseases
426.0, 426.10, 426.12, 426.13, 426.7, 426.9, 427, 785.0, 996.01, 996.04, V45.0, V53.3	Arrhythmia
430–438	Cerebrovascular diseases
440–448, 557, 093.0	Peripheral vascular diseases
278.0, 272	Obesity–dyslipidemia
456.0–456.2 570–573 V42.7	Liver disease
0.70, 577.0–577.9, 555, 556	Chronic digestive disease (excluding liver)
582‐588, V42.0, V45.1, V56 PROCEDURES: 38.95, 39.95, 54.98, 55.6	Chronic renal diseases
334.1, 342, 343, 344, 331, 332, 333.4, 333.5, 334‐335, 336.2, 340, 341, 345, 348.1, 348.3, 784.3, 356‐359	Neurological and muscle disease
280, 281, 285.9, 286, 287.1, 287.3–287.5	Anaemia and coagulation disorders
240–246	Thyroid disease
300.4, 301.12, 309.0, 309.1, 311	Depression
293.8, 295–298, 299.1, 290.0–290.4, 294.1, 331.0	Psychiatric disease
531–534, 530.81	Peptic ulcer/oesophageal reflux
710, 714	Rheumatologic/diffuse disease of connective tissue
042, 279	HIV aids/disorders involving immune mechanism