Table 1.
ICD 9 and ICD10 codes utilized in the study.
| Disease | ICD9 codes | ICD10 codes |
|---|---|---|
| Post-traumatic stress disorder | 309.81 | F43.1, F43.10, F423.11, F43.12 |
| Gastroesophageal reflux disease | 530.81 | K.21.0, K21.9 |
| Peptic ulcer disease | 533 | K.27 (all subcodes) |
| Functional dyspepsia | 536.8 | K30 (all subcodes) |
| Crohn’s disease | 555 (all subcodes) | K50 (all subcodes) |
| Ulcerative colitis | 556 (all subcodes) | K51 (all subcodes) |
| Diverticular disease | 562 (all subcodes) | K57 (all subcodes) |
| Irritable bowel syndrome | 564.1 | K58 (all subcodes) |
| Constipation | 564.00, 564.01, 564.02, 564.09 | K59.04 |
| Nausea/vomiting | 787 (all subcodes) | R11 (all subcodes) |
| Secondary mental illness | 290–319, except 309.81 (all subcodes) | F01–F48, except F43.1-.11 (all subcodes) |
Table shows the ICD9 and ICD10 codes that were used for data collection.