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Table 1 Effects of transition to ICD-10-CM on observed injury severity, mechanism of injury, and traumatic brain injury-related hospitalization trends among young adults

From: Impact of ICD-9-CM to ICD-10-CM coding transition on trauma hospitalization trends among young adults in 12 states

  Initial level (Jan 2011) Monthly trend before transition Level change after transition Trend change after transition
Severity of Injury, % (ICDPIC-R Version 1)a
 Mild, GEMmin (ISS: 0–8) 50.1 −0.12* 9.9* 0.01
 Moderate, GEMmin (ISS: 9–15) 32.6 0.04‡ −9.2* −0.04
 Severe, GEMmin (ISS > 15) 17.6 0.07* −0.4 0.04
 Mild, GEMmax (ISS: 0–8) 50.0 −0.12* 7.3* 0.01
 Moderate, GEMmax (ISS: 9–15) 32.5 0.05‡ −12.8* −0.06
 Severe, GEMmax (ISS > 15) 17.7 0.06* 6.0* 0.07‡
Severity of Injury, % (Updated ICDPIC-R)a, b
 Mild, GEMmin (ISS: 0–8) 50.0 −0.12* 4.0* −0.03
 Moderate, GEMmin (ISS: 9–15) 32.6 0.04‡ −4.3* −0.02
 Severe, GEMmin (ISS > 15) 17.6 0.07* 0.6 0.07‡
 Mild, GEMmax (ISS: 0–8) 50.0 −0.12* 1.2 −0.03
 Moderate, GEMmax (ISS: 9–15) 32.6 0.04‡ −7.7* −0.05
 Severe, GEMmax (ISS > 15) 17.5 0.07* 6.7* 0.10‡
Mechanism of Injury, Rate per 100,000c
 Cut/Pierce 1.28 −0.006* −0.04 0.005†
 Drowning 0.01 0.000 0.004† 0.000
 Fall 3.52 −0.008* −0.02 0.002
 Fire/Burn 0.61 −0.001† −0.23* −0.001
 Firearm 1.17 0.002 0.12‡ −0.001
 Machinery 0.29 −0.002* 0.04† 0.001
 MVT 5.50 −0.003 − 0.03 −0.007
 Pedal Cyclist, Other 0.30 −0.001* −0.05‡ −0.001
 Pedestrian, Other 0.04 0.000 0.12* −0.002‡
 Transportation, Other 0.87 −0.004* −0.11† 0.001
 Natural/Environmental 0.16 −0.001* −0.09* 0.000
 Struck by/Against 1.54 −0.007* −0.01 0.007†
 Suffocation 0.01 0.000 0.07* −0.001*
 Other specified 0.38 −0.001* −0.11* 0.001
 Unspecified 0.54 −0.001‡ 0.25* −0.009*
TBI, Rate per 100,000d 4.54 −0.017* 0.60* 0.002
 Skull Fracture 1.44 −0.002 − 0.04 −0.001
 Other/Unspecified Fracture of Skull/Facial Bones 0.15 0.000 0.36* −0.004*
 Intracranial Injury 4.06 −0.016* 0.60* 0.004
  1. ISS Injury Severity Score, GEM General equivalence mappings for linking ICD-9 to ICD-10 codes, TBI Traumatic brain injury
  2. a Excludes patients with any burn injury diagnosis
  3. b ICDPIC-R Updated to recognize ICD-10-CM codes with 7th characters of “B” or “C” and FY 2017, 2018 updates
  4. c Excludes patients without an ECOI code
  5. d Subcategories are not mutually exclusive
  6. *, p < .0001; †, p < .05; ‡, p < .01