T20.511D vs T20.519D

T20.511D (Corrosion of first degree of right ear [any part, except ear drum], subsequent encounter) compared with T20.519D (Corrosion of first degree of unspecified ear [any part, except ear drum], subsequent encounter), from the official CMS tabular data. T20.511D and T20.519D code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

T20.511D

Right

Corrosion of first degree of right ear [any part, except ear drum], subsequent encounter

↔

T20.519D

Unspecified

Corrosion of first degree of unspecified ear [any part, except ear drum], subsequent encounter

Same condition; these differ only in which side is documented.

These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.

Source: ICD-10-CM tabular list (laterality variant derived from the code title)

Can these codes be reported together?

Same condition, opposite side. T20.511D and T20.519D name the same condition on opposite sides of the body.

Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

Side by side

	T20.511DCorrosion of first degree of right ear [any part, except ear drum], subsequent encounter	T20.519DCorrosion of first degree of unspecified ear [any part, except ear drum], subsequent encounter
Billing status	Billable	Billable
Classification	S00-T88 — Injury, poisoning and certain other consequences of external causes	S00-T88 — Injury, poisoning and certain other consequences of external causes
Definition	Corrosion of first degree of right ear [any part, except ear drum], subsequent encounter is a billable ICD-10-CM diagnosis code (T20.511D).	Corrosion of first degree of unspecified ear [any part, except ear drum], subsequent encounter is a billable ICD-10-CM diagnosis code (T20.519D).
7th character	The appropriate 7th character is to be added to each code from category T20	The appropriate 7th character is to be added to each code from category T20
Includes	burns and corrosions of first degree [erythema] burns and corrosions of second degree [blisters][epidermal loss] burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]	burns and corrosions of first degree [erythema] burns and corrosions of second degree [blisters][epidermal loss] burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]
Use additional code	external cause code to identify place (Y92) code from category T31 or T32 to identify extent of body surface involved	external cause code to identify place (Y92) code from category T31 or T32 to identify extent of body surface involved
Code first	(T51-T65) to identify chemical and intent	(T51-T65) to identify chemical and intent

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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