K91.2 vs T81.9XXD

K91.2 (Postsurgical malabsorption, not elsewhere classified) compared with T81.9XXD (Unspecified complication of procedure, subsequent encounter), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Relationship

Informational

Excludes2 relationship

T81.9XXD

Unspecified complication of procedure, subsequent encounter

↔

K91.2

Postsurgical malabsorption, not elsewhere classified

Distinct conditions — both may be reported.

“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.-)”

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source: CMS ICD-10-CM tabular instructional notes

Informational

Excludes2 relationship

T81.9XXD

Unspecified complication of procedure, subsequent encounter

↔

K91.2

Postsurgical malabsorption, not elsewhere classified

Distinct conditions — both may be reported.

“postsurgical blind-loop syndrome (K91.2)”

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source: CMS ICD-10-CM tabular instructional notes

Can these codes be reported together?

Yes, when both are documented. T81.9XXD carries an Excludes2 note covering K91.2: “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.-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Yes, when both are documented. T81.9XXD carries an Excludes2 note covering K91.2: “postsurgical blind-loop syndrome (K91.2)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

	K91.2Postsurgical malabsorption, not elsewhere classified	T81.9XXDUnspecified complication of procedure, subsequent encounter
Billing status	Billable	Billable
Classification	K00-K95 — Diseases of the Digestive System (K00-K95)	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
Definition	Postsurgical malabsorption, not elsewhere classified is a billable ICD-10-CM diagnosis code (K91.2).	Unspecified complication of procedure, subsequent encounter is a billable ICD-10-CM diagnosis code (T81.9D).
7th character	—	The appropriate 7th character is to be added to each code from category T81
Includes	Postsurgical blind loop syndrome	—
Use additional code	—	code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) code(s) to identify the specified condition resulting from the complication code to identify devices involved and details of circumstances (Y62-Y82)

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources