Comorbidity	ICD-9-CM Codes
Diabetes	250
Anxiety	300.0
Depression	296.2, 296.3, 298.0, 300.4, 309.1, 311
Hypertension	401-404
Hyperlipidemia	272.0-272.4
Coronary heart disease	410-414
Cerebrovascular disease (stroke)	430-438
Peripheral vascular disease	440, 441, 443, 447.1, 557.1, 557.9, V43.4
Obesity	278.0
Rheumatoid arthritis	714
Crohn’s disease or ulcerative colitis	555-556
Multiple sclerosis	340
Other autoimmune disorders	704.01 (alopecia areata), 579.0 (celiac disease), 710.1 (systemic sclerosis), 710.2 (Sjögren’s syndrome), 709.01, 374.53 (vitiligo), 708 (chronic urticaria), 710.0 (systemic lupus erythematosus), 255.4 (Addison’s disease), 446.5 (giant cell arteritis), 515, 516.31 (pulmonary fibrosis), 582 (chronic glomerulonephritis)
Skin cancer	172 (melanoma skin cancer), 173 (nonmelanoma skin cancer)
Lymphoma	200.0-200.7, 202.1, 202.2, 202.7 (non-Hodgkin’s lymphoma), 201.0-201.9 (Hodgkin’s lymphoma)
Other malignancies	162, 146, 155, 157, 174, 184.4, 187, 156, 189 (cancers of lung, pharynx, liver, pancreas, breast, vulva, penis, bladder, and kidney)
Psoriatic arthritis	696.0

ICD-9-CM = International Classification of Diseases, Ninth Revision, Clinical Modification.