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Table 3 CPT Intensity Codes by NYU Severity Ratings (and Rates of Hospitalization)

From: Defining emergency department episodes by severity and intensity: A 15-year study of Medicare beneficiaries

  Modified NYU Rating 1 Modified NYU Rating 2 Modified NYU Rating 3 Total
99281 323 (2.5%) 110 (9.1%) 67 (23.9%) 500 (6.8%)
99282 936 (2.9%) 386 (9.1%) 178 (26.4%) 1500 (7.3%)
99283 2067 (9.6%) 1437 (23.0%) 842 (41.9%) 4346 (20.3%)
99284 1752 (24.9%) 2362 (37.2%) 1743 (54.2%) 5857 (38.6%)
99285 1206 (54.7%) 2643 (62.8%) 2643 (68.8%) 6492 (63.7%)
Total 6284 (21.2%) 6938 (42.0%) 5473 (58.1%) 18695 (39.7%)