Table 1 Number (% changea) of outpatient visits (× 1000) of four hypertension-related coding practices in outpatient claims by the same physician in tertiary medical centers (intervention) and clinics (control group) from 2016Q1 to 2017Q3 in Taiwan (ICD-10-CM code I10 is the Outpatient Volume Control Program (OVCP) monitoring code and I11-I13 are non-OVCP monitoring codes)
2016Q1 | 2016Q2 | 2016Q3 | 2016Q4 | 2017Q1 | 2017Q2 | 2017Q3 | 95% CI of 2017Q3 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Coding practice 1: I10 a primary diagnosis | |||||||||||||||
Medical centers | 333 | (0%) | 330 | (−1%) | 315 | (−5%) | 284 | (−15%) | 188 | (− 44%) | 105 | (−68%) | 85 | (−74%) | − 73.8% to − 74.9% |
Clinics | 1448 | (0%) | 1465 | (+ 1%) | 1443 | (0%) | 1351 | (−7%) | 1221 | (−16%) | 1155 | (−20%) | 1111 | (−23%) | −23.2% to − 23.3% |
Coding practice 2: I10 in secondary diagnosis | |||||||||||||||
Medical centers | 868 | (0%) | 955 | (+ 10%) | 916 | (+ 6%) | 873 | (+ 1%) | 811 | (−7%) | 756 | (−13%) | 734 | (− 15%) | −15.4% to − 15.4% |
Clinics | 511 | (0%) | 533 | (+ 4%) | 532 | (−2%) | 500 | (−2%) | 447 | (−13%) | 430 | (−16%) | 417 | (−18%) | −18.3% to −18.4% |
Coding practice 3: I11 − I13 in primary diagnosis | |||||||||||||||
Medical centers | 117 | (0%) | 134 | (+ 14%) | 131 | (+ 12%) | 129 | (+ 10%) | 140 | (+ 19%) | 192 | (+ 64%) | 203 | (+ 73%) | 72.7 to 73.8% |
Clinics | 254 | (0%) | 257 | (+ 1%) | 256 | (+ 1%) | 244 | (−4%) | 224 | (−12%) | 213 | (−16%) | 206 | (−19%) | −18.9% to −19.2% |
Coding practice 4: I11 − I13 in secondary diagnosis | |||||||||||||||
Medical centers | 143 | (0%) | 159 | (+ 12%) | 154 | (+ 8%) | 151 | (+ 6%) | 152 | (+ 6%) | 153 | (+ 7%) | 152 | (+ 7%) | 6.7 to 6.8% |
Clinics | 99 | (0%) | 103 | (+ 4%) | 103 | (+ 4%) | 99 | (0%) | 89 | (−10%) | 86 | (−13%) | 83 | (−17%) | −16.4% to −16.7% |