T85.123A vs T85.123D

T85.123A (Displacement of implanted electronic neurostimulator, generator, initial encounter) compared with T85.123D (Displacement of implanted electronic neurostimulator, generator, subsequent encounter), from the official CMS tabular data. T85.123A and T85.123D code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

T85.123A

Initial encounter

Displacement of implanted electronic neurostimulator, generator, initial encounter

↔

T85.123D

Subsequent encounter

Displacement of implanted electronic neurostimulator, generator, 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. T85.123A and T85.123D 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

	T85.123ADisplacement of implanted electronic neurostimulator, generator, initial encounter	T85.123DDisplacement of implanted electronic neurostimulator, generator, 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	Displacement of implanted electronic neurostimulator, generator, initial encounter is a billable ICD-10-CM diagnosis code (T85.123A).	Displacement of implanted electronic neurostimulator, generator, subsequent encounter is a billable ICD-10-CM diagnosis code (T85.123D).
7th character	The appropriate 7th character is to be added to each code from category T85	The appropriate 7th character is to be added to each code from category T85
Includes	Displacement of implanted electronic neurostimulator generator, brain, peripheral, gastric, spinal Displacement of implanted electronic sacral neurostimulator, pulse generator or receiver	Displacement of implanted electronic neurostimulator generator, brain, peripheral, gastric, spinal Displacement of implanted electronic sacral neurostimulator, pulse generator or receiver
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)	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