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. Author manuscript; available in PMC: 2021 Nov 1.
Published in final edited form as: J Gastrointest Surg. 2019 Nov 21;24(11):2602–2612. doi: 10.1007/s11605-019-04407-6

Appendix Table 1:

Diagnosis Groupings by ICD9 and ICD10 Codes

Diagnosis
Codes for
Surgery		 ICD10 codes ICD9 codes
Neoplasms
Colorectal cancer

  • 'C182','C184','C186','C187','C188','C189','Z1211','C20','C218','C785','Z1212','Z85048', 'Z85048','Z85038','C19','C785'

  • 'C18','C21'

  • 'C7A021', 'C7A022','C7A023', 'C7A024', 'C7A025', 'C7A026','C7A029'

  • '1536','1531','1532','1533','1538','1539','V7651','1543','1541','1548','1975'

  • '153','154'
Colorectal adenomas/polyps

  • 'Z85030','Z85040','D3A021', 'D3A022', 'D3A023', 'D3A024', 'D3A025', 'D3A026', 'D3A029','K635'

  • 'D12'

  • '2113', '2114'
Other neoplasms

  • 'C78','C80','C16','C17','C25'

  • 'C7A012','C884','C7A010','C7A011', 'C7A019','C7A020','C26','C260','C261','C269','C451,'C480','C481', 'C482','C488','C23','D3A0','D3A00','D3A01','D3A010','D3A011', 'D3A012','D3A019','D3A020','D371', 'D372', 'D373','D376','D378','D379','C49A3','C50912', 'C541','C561','C569','C641','C7A019','C7A020','C7A020','C7A020','C7A020','C7A8','C7A8','C8333','C8333','C8339','C8339','D1339','D175','D175','D175','D1779','D271','D372','D373','D3A00','D3A00','D3A00','D3A012','D3A020','D3A020','D481','D490','D490','D490','D490','D490','Z85028','D374','D375'

  • Exclude:

    'C785'

  • '150','151','152','155','156','157','158','159','195','197','211','235','202','209','180','182','183','184','188'

  • '1715','1719'
Diverticular Disease
Diverticular disease

  • 'K5700','K5701','K5712','K5713','K5720','K5721','K5732','K5733', 'K5740','K5741', 'K5752','K5753','K5780','K5781','K5792','K5793'

  • 'K57'

  • 'K572', 'K5720', 'K5721', 'K573', 'K5730','K5731', 'K5732', 'K5733', 'K574', 'K5740', 'K5741', 'K575', 'K5750', 'K5751', 'K5752', 'K5753','K578', 'K5780', 'K5781', 'K579', 'K5790', 'K591', 'K5792', 'K5793'

  • 'K570', 'K5700', 'K5701', 'K5712', 'K5713', 'K632','N321', 'N322','N82', 'N820', 'N821', 'N823', 'N824', 'N828'

  • Exclude:

    'K570', 'K5700', 'K5701', 'K571', 'K5710', 'K5711', 'K5712', 'K5713'

  • '56201', '5695', '56203', '5695','56201','56203', '56211', '5695', '56213', '5695', '56211', '56213', '56201', '56211','5695','56203', '56213', '5695', '56201',

  • '56211', '56203', '56213', '56211','5695', '56213', '5695', '56211','56213'

  • '5961', '5962', '6191', '56212', '5621', '56210', '56211', '56213','56981','5374','562', '5620', '56200', '56201', '56203'
Inflammatory Bowel Disease
IBD

  • 'K51'

  • 'K5000','K50011','K50012','K50013','K50014','K50018','K50019','K5010','K50111','K50112','K50113','K50114','K50118','K50119','K5080','K50811','K50812','K50813','K50814','K50818','K50819','K5090','K50911','K50912','K50913','K50914','K50918', 'K50919','K5180','K51811','K51812','K51813','K51814','K51818','K51819','K5190', 'K51911','K51912','K51913','K51914','K51918','K51919'

  • '556'

  • '5550','5550','5550', '5609', '5550','56981','5550','5695','5550','5550','5551','5551','5551','5609', '5551','56981','5551', '5695', '5551', '5551', '5552','5552','5552', '5609','5552','56981','5552', '5695', '5552', '5552', '5559','5559', '5559','5609','5559', '56981','5559', '5695','5559','5559','5568', '5560','5561','5568','5568','56089','5568','56981','5568', '5695','5568','5568','5569','5569','5569','56089','5569', '56981','5569', '5695', '5569', '5569'
Other
Hemorrhage

  • 'K625', 'K922','K280', 'K282', 'K284', 'K286'

  • 'K916'

  • ‘K9184'

  • '5789', '2851', '53240', '5693', '56985','53784'
Obstruction/ileus

  • 'K40', 'K41', 'K42', 'K43', 'K44', 'K45','K54','K56'

  • 'K913'

  • Exclude:

    'K564', 'K5641', 'K5649'

  • '5373','5680','5647'

  • '5510'

  • '550','551','552','553','560'

  • Exclude:

    '5603','56030','56032', '56039'
Other inflammatory disease

  • 'A00','A01','A02','A03','A04','A05','A06','A07','A08','A09','A40','A41','K52','K61','K65'

  • 'K51413','K5150', 'K593', 'K5931', 'K5939','K630', 'K631','K9171', 'M79A3','R100','R6521','T814XXA','K35', 'K352', 'K3520', 'K3521', 'K353', 'K3530', 'K3531', 'K3532', 'K3533', 'K358', 'K3580', 'K3589', 'K35890', 'K35891','K36', 'K37', 'K389','K633','S36531A','T8132XA','T8579XA'

  • '038','540','541','542','543','001','002','003','004','005','006','007','008','009','558','567'

  • '566','1173','53540','5695','56983','95890','99592','99831','99591','99660','99669','9982'
Vascular insufficiency

  • 'K55'

  • '557'
Diagnosis
Codes for
Readmissions
and ED Visits		 ICD10 codes ICD9 codes
Acute renal failure

  • 'N17','N19'

  • '5840','5841','5842','5843','5844','5845','5846','5847','5848','5849'

  • '586'
Dehydration/fluid imbalance

  • 'E860','E861','E869'

  • 'I95'

  • 'R000','E87', 'E870', 'E871', 'E872','E873', 'E874', 'E875', 'E876', 'E878'

  • '27651'

  • '458'

  • '7802','7850','7804'
SSI

  • 'T814','L30311', 'L03317', 'L03314', 'L03315', 'L03316', 'L03317','T813', 'T8130', 'T8130XA', 'T8130XD', 'T8130XS','T8131', 'T8131XA', 'T8131XD', 'T8131XS','T8132', 'T8132XA', 'T8132XD', 'T8132XS','T8141', 'T8141XA', 'T8141XD', 'T8141XS','T8142', 'T8142XA', 'T8142XD', 'T8142XS','T8143', 'T8143XA', 'T8143XD', 'T8143XS','T8149', 'T8149XA', 'T8149XD', 'T8149XS', 'T814XXA','K651','486'

  • '038'

  • '9583','9983','9985', '99851

  • '682'

  • '6868', '6869','5672', '56721', '56722','56723', '56729'

  • 'L7682','99830', '99831', '99832', '99883'
Ileus/ nausea/ vomiting

  • 'K560','K567','R11'

  • 'K566'

  • 'K910', 'K913', 'K9130', 'K9131', 'K9132', 'K917', 'K9171', 'K9172','R110', 'R111', 'R1110', 'R1111', 'R1112', 'R1113', 'R1114', 'R112'

  • '5601','7870', '7871', '7872','7873', '7874','5362','560', '5608', '5609','56089', '7870', '78701', '78702', '78703', '78704'
Ileostomy

  • 'Z432','K941', 'K9410', 'K9411', 'K9412', 'K9413', 'K9419','K940', 'K9400', 'K9401', 'K9402', 'K9403', 'K9409', 'Z465', 'Z4659','Z932', 'Z933'

  • 'V552','5696', '56960', '56961', '56962', '56969','V553'
Other postoperative infections

  • 'A0471', 'A0472','A0839', 'A084', 'A088','A09','A41', 'A410', 'A4101', 'A4102','A411', 'A412', 'A413', 'A414', 'A415', 'A4150', 'A4151', 'A4152', 'A413','A419', 'A418', 'A4181', 'A4189', 'A419', 'J101','J189','K65', 'K650', 'K652', 'K658', 'K659','K750','N390','N732'

  • 'A04','A40'

  • '482', '4820', '4821', '4823', '48231', '48232', '48239', '4824','48240', '48241','48242', '48249', '4828', '48281', '48282', '48283', '48284', '48289', '4829','555', '5550', '5551', '5552', '5559','5990','567', '5670', '5671','99859'
Pain

  • 'G89', 'G891', 'G8918','R10', 'R101', 'R1010', 'R1011','R1012', 'R1013', 'R102', 'R103', 'R1030', 'R1031 ','R1032', 'R1033', 'R108', 'R1081', 'R10811', 'R10812','R10813', 'R10814', 'R10815', 'R10816', 'R10817','R10819', 'R1084', 'R109', 'G8929'

  • '7890', '78900', '78901', '78902', '78903', '78904', '78905', '78906', '78907','78909', '7896', '78960', '78961', '78962', '78963', '78964', '78965', '78966','78967', '78969', '338', '3381', '33811', '33818', '33819', '56942', '78096'