Supplementary Table 1. Procedure Codes Used to Identify Colorectal Surgeries

Supplementary Table 1. Procedure codes used to identify colorectal surgeries.

Code Type Code Description Laparoscopy

Mobilization (take-down) of splenic flexure performed in CPT4 44139 conjunction with partial colectomy (List separately in addition to Open primary procedure) CPT4 44140 Colectomy, partial; with anastomosis Open CPT4 44141 Colectomy, partial; with skin level cecostomy or colostomy Open Colectomy, partial; with end colostomy and closure of distal CPT4 44143 Open segment (Hartmann type procedure) Colectomy, partial; with resection, with colostomy or ileostomy and CPT4 44144 Open creation of mucofistula CPT4 44145 Colectomy, partial; with coloproctostomy (low pelvic anastomosis) Open Colectomy, partial; with coloproctostomy (low pelvic anastomosis), CPT4 44146 Open with colostomy CPT4 44147 Colectomy, partial; abdominal and transanal approach Open Colectomy, total, abdominal, without proctectomy; with ileostomy CPT4 44150 Open or ileoproctostomy Colectomy, total, abdominal, without proctectomy; with continent CPT4 44151 Open ileostomy Colectomy, total, abdominal, without proctectomy; with rectal CPT4 44152 Open mucosectomy, ileoanal anastomosis, with or without loop ileostomy Colectomy, total, abdominal, without proctectomy; with rectal CPT4 44153 mucosectomy, ileoanal anastomosis, creation of ileal reservoir (S Open or J), with or without loop ileostomy CPT4 44155 Colectomy, total, abdominal, with proctectomy; with ileostomy Open Colectomy, total, abdominal, with proctectomy; with continent CPT4 44156 Laparoscopy ileostomy Colectomy, total, abdominal, with proctectomy; with ileoanal CPT4 44157 anastomosis, includes loop ileostomy, and rectal mucosectomy, Laparoscopy when performed Colectomy, total, abdominal, with proctectomy; with ileoanal CPT4 44158 anastomosis, creation of ileal reservoir (S or J), includes loop Laparoscopy ileostomy, and rectal mucosectomy, when performed Colectomy, partial, with removal of terminal ileum with CPT4 44160 Laparoscopy ileocolostomy CPT4 44188 Laparoscopy, surgical, colostomy or skin level cecostomy Laparoscopy CPT4 44204 Laparoscopy, surgical; colectomy, partial, with anastomosis Laparoscopy Laparoscopy, surgical; colectomy, partial, with removal of terminal CPT4 44205 Laparoscopy ileum with ileocolostomy Laparoscopy, surgical; colectomy, partial, with end colostomy and CPT4 44206 Laparoscopy closure of distal segment (Hartmann type procedure) Laparoscopy, surgical; colectomy, partial, with anastomosis, with CPT4 44207 Laparoscopy coloproctostomy (low pelvic anastomosis) Laparoscopy, surgical; colectomy, partial, with anastomosis, with CPT4 44208 Laparoscopy coloproctostomy (low pelvic anastomosis) with colostomy CPT4 44209 Unlisted laparoscopy procedure, intestine (except rectum) Laparoscopy Laparoscopy, surgical; colectomy, total, abdominal, without CPT4 44210 Laparoscopy proctectomy, with ileostomy or ileoproctostomy Laparoscopy, surgical; colectomy, total, abdominal, with CPT4 44211 proctectomy, with ileoanal anastomosis, creation of ileal reservoir Open (S or J), with loop ileostomy, with or without rectal mucosectomy

Code Type Code Description Laparoscopy

Laparoscopy, surgical; colectomy, total, abdominal, with CPT4 44212 Open proctectomy, with ileostomy Laparoscopy, surgical, mobilization (take-down) of splenic flexure CPT4 44213 performed in conjunction with partial colectomy (List separately in Open addition to primary procedure) Laparoscopy, surgical, closure of enterostomy, large or small CPT4 44227 Open intestine, with resection and anastomosis Enterostomy or cecostomy, tube (eg, for decompression or CPT4 44300 Open feeding) (separate procedure) CPT4 44320 Colostomy or skin level cecostomy; (separate procedure) Open Colostomy or skin level cecostomy; with multiple biopsies (eg, for CPT4 44322 Open congenital megacolon) (separate procedure) Revision of colostomy; simple (release of superficial scar) CPT4 44340 Open (separate procedure) CPT4 45111 Proctectomy; partial resection of rectum, transabdominal approach Open Proctectomy, combined abdominoperineal, pull-through procedure CPT4 45112 Open (eg, colo-anal anastomosis) Proctectomy, partial, with rectal mucosectomy, ileoanal CPT4 45113 anastomosis, creation of ileal reservoir (S or J), with or without loop Open ileostomy Proctectomy, partial, with anastomosis; abdominal and transsacral CPT4 45114 Open approach Proctectomy, partial, with anastomosis; transsacral approach only CPT4 45116 Open (Kraske type) Proctectomy, combined abdominoperineal pull-through procedure CPT4 45119 (eg, colo-anal anastomosis), with creation of colonic reservoir (eg, Open J-pouch), with or without proximal diverting ostomy Proctectomy, complete (for congenital megacolon), abdominal and CPT4 45120 perineal approach; with pull-through procedure and anastomosis Open (eg, Swenson, Duhamel, or Soave type operation) Proctectomy, complete (for congenital megacolon), abdominal and CPT4 45121 perineal approach; with subtotal or total colectomy, with multiple Open biopsies CPT4 45123 Proctectomy, partial, without anastomosis, perineal approach Laparoscopy Pelvic exenteration for colorectal malignancy, with proctectomy (with or without colostomy), with removal of bladder and ureteral CPT4 45126 Laparoscopy transplantations, and/or hysterectomy, or cervicectomy, with or without removal of tube(s), with or without removal of ovary(s Excision of rectal procidentia, with anastomosis; abdominal and CPT4 45135 Laparoscopy perineal approach Destruction of rectal tumor (eg, electrodessication, electrosurgery, CPT4 45190 Laparoscopy laser ablation, laser resection, cryosurgery) transanal approach Laparoscopy, surgical; proctectomy, complete, combined CPT4 45395 Laparoscopy abdominoperineal, with colostomy Laparoscopy, surgical; proctectomy, combined abdominoperineal pull-through procedure (eg, colo-anal anastomosis), with creation CPT4 45397 Laparoscopy of colonic reservoir (eg, J-pouch), with diverting enterostomy, when performed ICD9 17.3 Laparoscopic partial excision of large intestine Laparoscopy ICD9 17.31 Laparoscopic multiple segmental resection of large intestine Laparoscopy ICD9 17.32 Laparoscopic cecectomy Laparoscopy ICD9 17.33 Laparoscopic right hemicolectomy Laparoscopy ICD9 17.34 Laparoscopic resection of transverse colon Open

Code Type Code Description Laparoscopy

ICD9 17.35 Laparoscopic left hemicolectomy Open ICD9 17.36 Laparoscopic sigmoidectomy Open ICD9 17.39 Other laparoscopic partial excision of large intestine Open ICD9 45.7 Open and other partial excision of large intestine Open ICD9 45.71 Open and other multiple segmental resection of large intestine Open ICD9 45.72 Open and other cecectomy Open ICD9 45.73 Open and other right hemicolectomy Open ICD9 45.74 Open and other resection of transverse colon Open ICD9 45.75 Open and other left hemicolectomy Laparoscopy ICD9 45.76 Open and other sigmoidectomy Open ICD9 45.79 Other and unspecified partial excision of large intestine Open ICD9 45.8 Total intra-abdominal colectomy Open ICD9 45.81 Laparoscopic total intra-abdominal colectomy Open ICD9 45.82 Open total intra-abdominal colectomy Laparoscopy ICD9 45.83 Other and unspecified total intra-abdominal colectomy Open ICD9 48.5 Abdominoperineal resection of rectum Open ICD9 48.5 Abdominoperineal resection of the rectum, not otherwise specified Open ICD9 48.51 Laparoscopic abdominoperineal resection of the rectum Open ICD9 48.52 Open abdominoperineal resection of the rectum Open ICD9 48.59 Other abdominoperineal resection of the rectum Open ICD9 48.6 Other resection of rectum Open ICD9 48.62 Anterior resection of rectum with synchronous colostomy Open ICD9 48.63 Other anterior resection of rectum Open ICD10 0DBE0ZZ Excision of Large Intestine, Open Approach Open ICD10 0DBE3ZZ Excision of Large Intestine, Percutaneous Approach Open ICD10 0DBE4ZZ Excision of Large Intestine, Percutaneous Endoscopic Approach Other ICD10 0DBE7ZZ Excision of Large Intestine, Via Natural or Artificial Opening Other Excision of Large Intestine, Via Natural or Artificial Opening ICD10 0DBE8ZZ Open Endoscopic ICD10 0DBF0ZZ Excision of Right Large Intestine, Open Approach Open ICD10 0DBF3ZZ Excision of Right Large Intestine, Percutaneous Approach Open Excision of Right Large Intestine, Percutaneous Endoscopic ICD10 0DBF4ZZ Other Approach ICD10 0DBF7ZZ Excision of Right Large Intestine, Via Natural or Artificial Opening Other Excision of Right Large Intestine, Via Natural or Artificial Opening ICD10 0DBF8ZZ Open Endoscopic ICD10 0DBG0ZZ Excision of Left Large Intestine, Open Approach Open ICD10 0DBG3ZZ Excision of Left Large Intestine, Percutaneous Approach Open Excision of Left Large Intestine, Percutaneous Endoscopic ICD10 0DBG4ZZ Other Approach ICD10 0DBG7ZZ Excision of Left Large Intestine, Via Natural or Artificial Opening Other

Code Type Code Description Laparoscopy

Excision of Left Large Intestine, Via Natural or Artificial Opening ICD10 0DBG8ZZ Open Endoscopic ICD10 0DBH0ZZ Excision of Cecum, Open Approach Open ICD10 0DBH3ZZ Excision of Cecum, Percutaneous Approach Open ICD10 0DBH4ZZ Excision of Cecum, Percutaneous Endoscopic Approach Other ICD10 0DBH7ZZ Excision of Cecum, Via Natural or Artificial Opening Other ICD10 0DBH8ZZ Excision of Cecum, Via Natural or Artificial Opening Endoscopic Open ICD10 0DBK0ZZ Excision of Ascending Colon, Open Approach Open ICD10 0DBK3ZZ Excision of Ascending Colon, Percutaneous Approach Open ICD10 0DBK4ZZ Excision of Ascending Colon, Percutaneous Endoscopic Approach Other ICD10 0DBK7ZZ Excision of Ascending Colon, Via Natural or Artificial Opening Other Excision of Ascending Colon, Via Natural or Artificial Opening ICD10 0DBK8ZZ Open Endoscopic ICD10 0DBL0ZZ Excision of Transverse Colon, Open Approach Open ICD10 0DBL3ZZ Excision of Transverse Colon, Percutaneous Approach Open ICD10 0DBL4ZZ Excision of Transverse Colon, Percutaneous Endoscopic Approach Other ICD10 0DBL7ZZ Excision of Transverse Colon, Via Natural or Artificial Opening Other Excision of Transverse Colon, Via Natural or Artificial Opening ICD10 0DBL8ZZ Open Endoscopic ICD10 0DBM0ZZ Excision of Descending Colon, Open Approach Open ICD10 0DBM3ZZ Excision of Descending Colon, Percutaneous Approach Open Excision of Descending Colon, Percutaneous Endoscopic ICD10 0DBM4ZZ Other Approach ICD10 0DBM7ZZ Excision of Descending Colon, Via Natural or Artificial Opening Other Excision of Descending Colon, Via Natural or Artificial Opening ICD10 0DBM8ZZ Open Endoscopic ICD10 0DBN0ZZ Excision of Sigmoid Colon, Open Approach Open ICD10 0DBN3ZZ Excision of Sigmoid Colon, Percutaneous Approach Open ICD10 0DBN4ZZ Excision of Sigmoid Colon, Percutaneous Endoscopic Approach Other ICD10 0DBN7ZZ Excision of Sigmoid Colon, Via Natural or Artificial Opening Open Excision of Sigmoid Colon, Via Natural or Artificial Opening ICD10 0DBN8ZZ Open Endoscopic ICD10 0DTE0ZZ Resection of Large Intestine, Open Approach Open ICD10 0DTE4ZZ Resection of Large Intestine, Percutaneous Endoscopic Approach Other ICD10 0DTE7ZZ Resection of Large Intestine, Via Natural or Artificial Opening Open Resection of Large Intestine, Via Natural or Artificial Opening ICD10 0DTE8ZZ Open Endoscopic ICD10 0DTF0ZZ Resection of Right Large Intestine, Open Approach Open Resection of Right Large Intestine, Percutaneous Endoscopic ICD10 0DTF4ZZ Other Approach ICD10 0DTF7ZZ Resection of Right Large Intestine, Via Natural or Artificial Opening Open Resection of Right Large Intestine, Via Natural or Artificial Opening ICD10 0DTF8ZZ Open Endoscopic ICD10 0DTG0ZZ Resection of Left Large Intestine, Open Approach Open Resection of Left Large Intestine, Percutaneous Endoscopic ICD10 0DTG4ZZ Other Approach

Code Type Code Description Laparoscopy

ICD10 0DTG7ZZ Resection of Left Large Intestine, Via Natural or Artificial Opening Open Resection of Left Large Intestine, Via Natural or Artificial Opening ICD10 0DTG8ZZ Open Endoscopic ICD10 0DTH0ZZ Resection of Cecum, Open Approach Open ICD10 0DTH4ZZ Resection of Cecum, Percutaneous Endoscopic Approach Open ICD10 0DTH7ZZ Resection of Cecum, Via Natural or Artificial Opening Other ICD10 0DTH8ZZ Resection of Cecum, Via Natural or Artificial Opening Endoscopic Open ICD10 0DTK0ZZ Resection of Ascending Colon, Open Approach Open ICD10 0DTK0ZZ Resection of Ascending Colon, Open Approach Open Resection of Ascending Colon, Percutaneous Endoscopic ICD10 0DTK4ZZ Other Approach ICD10 0DTK7ZZ Resection of Ascending Colon, Via Natural or Artificial Opening Open Resection of Ascending Colon, Via Natural or Artificial Opening ICD10 0DTK8ZZ Open Endoscopic ICD10 0DTL0ZZ Resection of Transverse Colon, Open Approach Open Resection of Transverse Colon, Percutaneous Endoscopic ICD10 0DTL4ZZ Other Approach ICD10 0DTL7ZZ Resection of Transverse Colon, Via Natural or Artificial Opening Open Resection of Transverse Colon, Via Natural or Artificial Opening ICD10 0DTL8ZZ Open Endoscopic ICD10 0DTM0ZZ Resection of Descending Colon, Open Approach Open Resection of Descending Colon, Percutaneous Endoscopic ICD10 0DTM4ZZ Other Approach ICD10 0DTM7ZZ Resection of Descending Colon, Via Natural or Artificial Opening Open Resection of Descending Colon, Via Natural or Artificial Opening ICD10 0DTM8ZZ Open Endoscopic ICD10 0DTN0ZZ Resection of Sigmoid Colon, Open Approach Other ICD10 0DTN4ZZ Resection of Sigmoid Colon, Percutaneous Endoscopic Approach Other ICD10 0DTN7ZZ Resection of Sigmoid Colon, Via Natural or Artificial Opening Other Resection of Sigmoid Colon, Via Natural or Artificial Opening ICD10 0DTN8ZZ Other Endoscopic DRG 329 Major small and large bowel procedrues w MCC DRG 330 Major small and large bowel procedrues w CC DRG 331 Major small and large bowel procedrues w/o CC/MCC DRG 332 Rectal resection W MCC DRG 333 Rectal resection W CC DRG 334 Rectal resection W/0 CC/MCC