T81 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Complications of procedures, not elsewhere classified.
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Code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Complications following immunization (T88.0-T88.1)
Complications following infusion, transfusion and therapeutic injection (T80.-)
Complications of transplanted organs and tissue (T86.-)
Specified complications classified elsewhere, such as:
Complication of prosthetic devices, implants and grafts (T82-T85)
Dermatitis due to drugs and medicaments (L23.3, L24.4, L25.1, L27.0-L27.1)
Endosseous dental implant failure (M27.6-)
Floppy iris syndrome (IFIS) (intraoperative) H21.81
Intraoperative and postprocedural complications of specific body system (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95, K91.-, L76.-, M96.-, N99.-)
Plateau iris syndrome (post-iridectomy) (postprocedural) H21.82
Poisoning and toxic effects of drugs and chemicals (T36-T65 with fifth or sixth character 1-4)
The appropriate 7th character is to be added to each code from category T81
A: initial encounter
D: subsequent encounter
S: sequela
Postprocedural shock
Disruption of wound, not elsewhere classified
Infection following a procedure
Complications of foreign body accidentally left in body following procedure
Acute reaction to foreign substance accidentally left during a procedure
Vascular complications following a procedure, not elsewhere classified
Other complications of procedures, not elsewhere classified
Unspecified complication of procedure
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