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. Author manuscript; available in PMC: 2020 Dec 1.
Published in final edited form as: J Pediatr. 2019 Sep 10;215:56–63.e1. doi: 10.1016/j.jpeds.2019.07.061

Table 1.

(on-line) Severe neonatal morbidity ICD-9 diagnosis and procedure codes

Outcome Subgroup ICD-9 code
BPD 770.7
NEC
NEC_unspec 777.5
NEC_stage2 777.52
NEC_stage3 777.53
Laparotomy 456, 4561, 4562, 4563, 457, 4571, 4572, 4573, 4574, 4575, 4576, 4579, 458, 459, 4590, 4591, 4592,4593, 4594, 4595, 460, 4601, 4602, 4603, 4604, 4605, 461, 4610, 4611, 4613, 4614, 462, 4620, 4621 4622, 4623, 4624, 463, 4631, 4632, 4639, 464, 4640, 4641, 4642, 4643, 468, 4680, 4681, 4682, 4685, 4686, 4687, 541, 541,5411, 5412, 5419
ROP
ROP_stage3 362.25
ROP_stage4 362.26
ROP_stage5 362.27
ROP_surg 142, 1421, 1422, 1423, 1424, 1425, 1426, 1427, 1429, 1434, 144, 1441, 1449, 145, 1451, 1452, 1453, 1454, 1455, 1459
IVH
IVH_grade3 772.13
IVH_grade4 772.14