Table 1.

International Classification of Disease, Ninth Clinical Modification (ICD-9-CM) codes used to identify comorbidities in patients with bipolar disorder.

Comorbidity	ICD-9-CM Diagnosis Code
Medical Comorbidities
Hypertension	401.1, 401.9, 642.00–642.04, 401.0, 402.00–405.99, 437.2, 642.10–642.24, 642.70–642.94
Diabetes	249.00–249.31, 250.00–250.33, 648.00–648.04
Obesity	278.0, 278.00, 278.01, 278.03, 649.10–649.14, 793.91, V85.30–V85.39, V85.41–V85.45, V85.54
Hypothyroidism	243–244.2, 244.8, 244.9
Migraine	339.00–339.05, 339.09–339.12, 339.20–339.22, 339.3, 339.41–339.44, 339.81–339.85, 339.89, 346.0, 346.00–346.03, 346.1, 346.10–346.13, 346.2, 346.20–346.23, 346.30–346.33, 346.40–346.43, 346.50–346.53, 346.70–346.73, 346.8, 346.80–346.83, 346.9, 346.90–346.93, 784.0
Crohn’s Disease	560.89, 560.9
Multiple Sclerosis	340
Asthma	493.00–493.02, 493.10–493.12, 493.20–493.22, 493.81, 493.82, 493.90–493.92
Psychiatric Comorbidities
Drug abuse	292.0, 292.82–292.89, 292.9, 304.00–304.93, 305.20–305.93, 648.30–648.34
Alcohol abuse	291.0–291.3, 291.5, 291.8, 291.81, 291.82, 291.89, 291.9, 303.00–303.93, 305.00–305.03
Anxiety disorder	293.84, 300.00–300.02, 300.09, 300.10, 300.20–300.23, 300.29, 300.3, 300.5, 300.89, 300.9, 308.0–308.4, 308.9, 309.81, 313.0, 313.1, 313.21, 313.22, 313.3, 313.82, 313.83
Personality disorder	301.0, 301.10–301.13, 301.20–301.22, 301.3, 301.4, 301.50, 301.51, 301.59, 301.6, 301.7, 301.81–301.84, 301.89, 301.9
PTSD	309.81
ADHD	314.00, 314.01
Eating disorder	307.1, 307.50–307.54, 307.59

PTSD, Post-traumatic stress disorder; ADHD: Attention-deficit/hyperactivity disorder.