Table 3. Most common single diagnosis codes of patients undergoing parathyroidectomy due to primary hyperparathyroidism, 2002–2011.
| ICD-9-CM codes | Description | % | |
|---|---|---|---|
| 1 | 252.0X | Hyperparathyroidism | 82.26 |
| 2 | 227.1 | Benign neoplasm of parathyroid gland | 62.87 |
| 3 | 401.9 | Unspecified essential hypertension | 49.38 |
| 4 | 530.81 | Esophageal reflux | 15.20 |
| 5 | 275.42 | Hypercalcemia | 14.10 |
| 6 | 250.00 | Diabetes mellitus without mention of complication, type II or unspecified type, not stated as uncontrolled | 13.73 |
| 7 | 733.00 | Osteoporosis, unspecified | 11.72 |
| 8 | 272.4 | Other and unspecified hyperlipidemia | 11.04 |
| 9 | 272.0 | Pure hypercholesterolemia | 9.01 |
| 10 | 226 | Benign neoplasm of thyroid glands | 7.78 |
| 11 | 244.9 | Unspecified acquired hypothyroidism | 6.54 |
| 12 | V15.82 | Personal history of tobacco use | 6.50 |
| 13 | 305.1 | Tobacco use disorder | 6.34 |
| 14 | 311 | Depressive disorder, not elsewhere classified | 5.61 |
| 15 | 241.1 | Nontoxic multinodular goiter | 5.56 |
| 16 | 278.00 | Obesity, unspecified | 5.37 |
| 17 | 493.90 | Asthma, unspecified type, unspecified | 5.34 |
| 18 | 414.01 | Coronary atherosclerosis of native coronary artery | 5.24 |
| 19 | 241.0 | Nontoxic uninodular goiter | 4.26 |
| 20 | 715.90 | Osteoarthrosis, unspecified whether generalized or localized, site unspecified | 4.12 |
The frequency was examined using single diagnosis code except “252.0 Hyperparathyroidsim”, whose code has divided to sub-codes during the study period.