Skip to main content

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)

From: Physician code creep after the initiation of outpatient volume control program and implications for appropriate ICD-10-CM coding

 2016Q12016Q22016Q32016Q42017Q12017Q22017Q395% CI of 2017Q3
Coding practice 1: I10 a primary diagnosis
 Medical centers333(0%)330(−1%)315(−5%)284(−15%)188(− 44%)105(−68%)85(−74%)− 73.8% to − 74.9%
 Clinics1448(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 centers868(0%)955(+ 10%)916(+ 6%)873(+ 1%)811(−7%)756(−13%)734(− 15%)−15.4% to − 15.4%
 Clinics511(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 centers117(0%)134(+ 14%)131(+ 12%)129(+ 10%)140(+ 19%)192(+ 64%)203(+ 73%)72.7 to 73.8%
 Clinics254(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 centers143(0%)159(+ 12%)154(+ 8%)151(+ 6%)152(+ 6%)153(+ 7%)152(+ 7%)6.7 to 6.8%
 Clinics99(0%)103(+ 4%)103(+ 4%)99(0%)89(−10%)86(−13%)83(−17%)−16.4% to −16.7%
  1. Abbreviations: ICD − 10 – CM International Classification of Disease Tenth Revision Clinical Modification, I10 Essential (primary) hypertension, I11 Hypertensive heart disease, I12 Hypertensive chronic kidney disease, I13 Hypertensive heart and chronic kidney disease, 95% CI 95% confidence intervals
  2. aUsing the number of visits of 2016Q1 as the base for % change