S36.419A vs S36.419D

S36.419A (Primary blast injury of unspecified part of small intestine, initial encounter) compared with S36.419D (Primary blast injury of unspecified part of small intestine, subsequent encounter), from the official CMS tabular data. S36.419A and S36.419D code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

S36.419A

Initial encounter

Primary blast injury of unspecified part of small intestine, initial encounter

↔

S36.419D

Subsequent encounter

Primary blast injury of unspecified part of small intestine, subsequent encounter

Same underlying diagnosis, different encounter phase.

The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.

Source: ICD-10-CM Official Guidelines, Section I.C.19.a

Can these codes be reported together?

Same injury, other encounter phase. S36.419A and S36.419D code the same injury at a different phase of treatment, set by the 7th character.

The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.

Side by side

	S36.419APrimary blast injury of unspecified part of small intestine, initial encounter	S36.419DPrimary blast injury of unspecified part of small intestine, subsequent encounter
Billing status	Billable	Billable
Classification	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
Definition	Primary blast injury of unspecified part of small intestine, initial encounter is a billable ICD-10-CM diagnosis code (S36.419A).	Primary blast injury of unspecified part of small intestine, subsequent encounter is a billable ICD-10-CM diagnosis code (S36.419D).
7th character	The appropriate 7th character is to be added to each code from category S36	The appropriate 7th character is to be added to each code from category S36
Includes	injuries to the abdominal wall injuries to the anus injuries to the buttock injuries to the external genitalia	injuries to the abdominal wall injuries to the anus injuries to the buttock injuries to the external genitalia

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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